Abstract: A sealing technique is disclosed by which the firing voltage of atmospheric discharge is increased by a pressurizing procedure such that the internal pressure of a sealing chamber is held at room temperature above half (0.5) of the atmospheric pressure even after the completion of sealing. Preferably, the pressurizing procedure is accomplished by a partial modification in the existing sealing facilities (for example, belt furnaces and low temperature furnaces). In another aspect of the invention, the method for sealing a semiconductor device minimizes water in the chamber after sealing by suppressing water expelled from glass frit during sealing or allowing the glass frit to absorb the water expelled therefrom. In other words, sealing is performed first under nitrogen gas atmosphere and then under oxygen gas atmosphere.

Abstract: A pressure sensor including a pressure capsule such as a dual diaphragm quartz capacitance pressure capsule and structure for supporting and sealing same within the pressure environment to be measured. The pressure capsule having two parallel quartz plates spaced by a dielectric ring forming a vacuum chamber therein. The structure providing a force balanced support for compressively loading the pressure capsule through the dielectric ring. The structure further having transfer port therein to communicate the pressure environment to both plates.The method of making the quartz capacitive pressure capsule includes the steps of surface preparation, preglazing of the component parts and vacuum sealing by utilizing a controlled pressure-temperature profile.

Abstract: A method is described for the production of porous bodies from vitreous silica without the use of tools. Vitreous silica wool and/or threads are wound in layers on a form. After the coil has attained a certain minimum thickness, the threads of each succeeding layer are permanently bonded by heating the threads of the preceding layer at the points where the threads cross. The form is removed, and then the threads on the inside of the body are bonded together.The bodies are used for the production of high-purity blocks of silicon for solar cells.

Abstract: A capillary tube is shrunk around a wire heating element, fashioned into the desired configuration, and situated between the exterior surface of a cylindrical inner glass tube and the interior surface of a cylindrical outer glass tube, to form an assembly. The space between the adjacent tube surfaces is evacuated as a heat source is moved along the axis of the assembly to heat each longitudinal section of the assembly, in sequence. The element is thermally expanded as the outer tube surface collapses toward the inner tube surface, resulting in the fusion of the adjacent glass surfaces around the expanded element. In this manner, a channel is formed through the fused glass body which has the configuration and dimensions of the expanded element. During cooling, the element returns to its unexpanded condition. This results in a space between the channel walls and the element, permitting the element to expand, when electrically energized, without breaking the glass body.

Abstract: A composite article is disclosed which embodies a thermally sensitive component enclosed within borosilicate glass bodies having a coefficient of thermal expansion in the range of 30 to 40.times.10.sup.-7 /.degree.C. The bodies are joined by an intermediate layer of sealing material which is a fused mixture of a sealing glass containing an infra-red absorbing oxide and a mill additive having a low coefficient of thermal expansion. There is further disclosed a method of forming the seal between the glass bodies by application of infra-red radiation to the sealing material.

Abstract: This invention is drawn to thermally devitrifiable sealing glasses capable of forming sound seals with glasses, glass-ceramics, and ceramics having coefficients of thermal expansion (0.degree.-300.degree. C.) between about 0.5-5.times.10.sup.-7 /.degree. C. In finely fritted form, the glasses can be sintered and crystallized in situ at about 900.degree.-1000.degree. C. The glasses consist essentially, expressed in weight percent on the oxide basis, of about 1-2% Li.sub.2 O, 0.7-1.5% MgO, 9-13% ZnO, 19-23% Al.sub.2 O.sub.3, 62-68% SiO.sub.2, and at least 1% K.sub.2 O+Rb.sub.2 O+Cs.sub.2 O in the indicated proportions of 0-3% K.sub.2 O, 0-4% Rb.sub.2 O, and 0-6% Cs.sub.2 O.

Abstract: A method for making lightweight mirrors. The method consists of metallizing a precise pattern onto the back surface of a mirror element so as to provide a surface to which stiffening ribs or other components, such as flexure components, may readily be soldered.The method according to the present invention avoids the expense of conventional machining techniques and provides a better quality bond than is attainable by normal cementing. It also eliminates the risk of distortion and spoilage that is borne in fusing by firing to the softening point of the glass.

Abstract: A method of manufacturing glass-lined tube. An undercoat of glass is fused onto the surfaces of nozzle-shaped flange-pieces, from their outer peripheral edges to their molded and curved inner faces, welding flange components then welded to either end of the metal tube to form a complete flange at each end. The inner faces of the weld zones are then shaped by grinding and polishing. A glass tube that is greater in length than the metal tube is fitted loosely into the latter tube. The glass tube is supported at either end within the wells of conical caps which are fitted around the flanges by air-permeable spacer-rings, with the ends of the glass tube extending beyond the outward faces of the flange joints and with the glass tube being securely positioned at the center line of the metal tube.

Abstract: A process is disclosed for producing non-woven, yet internally cohesive, boron nitride fiber batts, suitable for use as an electric cell separator in a lithium-sulfide battery. Molten boron oxide is centrifugally spun into strands and attenuated by an annular gas stream into fibers at a controlled relative humidity. The fibers are funnelled into a chamber and subjected to a turbulent air flow, which causes random orientation and intertwining of the fibers, resulting in multiple mechanical bonds thereamong. The compacted boron oxide fiber bundle thus produced is heated in an anhydrous ammonia atmosphere to convert boron oxide in the fibers into boron nitride (BN).

Abstract: A thermal stress-resistant rotary regenerator type ceramic heat exchanger comprising a plurality of ceramic honeycomb structural matrix segments bonded by a ceramic binder is produced by extruding a plurality of ceramic honeycomb structural matrix segments, firing the segments, bonding the segments with one another by application of a ceramic binder, said ceramic binder after the subsequent sintering having substantially the same mineral composition as said ceramic matrix segments and the thickness of 0.1 to 6 mm, and a difference in thermal expansion being not greater than 0.1% at 800.degree. C. relative to the ceramic matrix segments, drying the bonded segments, and firing the dried bonded segments.

Abstract: A method and apparatus for collecting fibrous material in which a stream of fibrous material is directed towards a collection surface and a flow of gases is discharged substantially parallel to the stream and sufficiently close to the stream to expand the stream as it moves toward the collection surface.

Abstract: The forming of hermetic seals suitable for sealing materials having dissimilar thermal expansions which are formed by reacting an effective amount of a metal powder, selected from the group consisting of aluminum, antimony and zirconium, with glass frit having a softening point of <750.degree. C. and a coefficient of thermal expansion sufficiently compatible with the materials being sealed to yield seals characterized by a coefficient of thermal expansion closely matching or similar to those of the materials being sealed and a use temperature equal to or greater than 1000.degree. C. The seals of this invention are particularly suitable for bonding ceramic to ceramic.

Abstract: A capacitive pressure transducer having a first flexible electrically insulative diaphragm disposed apart from a second electrically insulative member, including a second flexible diaphragm, and where the diaphragm and member include metalized portions thereon forming the plates of a pressure sensing capacitor.The transducer further includes a pair of electrically insulative sealing rings disposed concentrically about one another which function to space said diaphragm and member apart and which form a hermetically sealed cavity therebetween, to establish the pressure sensitive region of the diaphragm and to reduce the tensile forces in the inner most sealing ring.

Abstract: A window pane construction comprises first and second light-transmissive panel members having peripheries which are sealed together and defining a viewing pane portion between the peripheries of the panes. The panes are spaced apart to define a hollow air space therebetween and, for this purpose, one pane member is advantageously made trough-shaped and the bottom of the trough defines a viewing pane portion of this pane. A shade member is positioned in the hollow space and it may comprise, for example, a windup window shade type or a venetian blind type. The shade member is connected to actuating means which is mounted outside the two light-transmissive panes and connected to the shade member for adjusting the position of at least a portion of the member in order to vary the light penetration through the two panes.

Abstract: A gapped bar is formed of a pair of rectangular parallelopiped magnetic core block having coil-winding grooves jointed to each other through a medium of a non-magnetic thickness. The gapped bar is provided with a plurality of non-magnetic glass mold parts disposed to limit at least the front gap portion to a predetermined track width. Then, a head core is formed by cutting the gapped bar at the glass mold parts at a predetermined angle to the longitudinal axis of the gapped bar and then effecting required processing such as finishing of the cut surface. Finally, an annealing is effected on thus formed head core at a temperature higher than the deformation point of the glass constituting the mold glass part.

Abstract: A method for fabricating a liquid crystal display element is disclosed, in which two substrates to be provided with electrodes are prepared, at least one of the substrates having a specific portion extending outwardly beyond the peripheral edge of the other substrate when they are assembled. A sealing material layer is formed on the surface provided with the electrode of the substrate, which layer includes a specific section extending along the peripheral edge of the specific portion and being formed on the substrate having the specific portion. The substrates are disposed one above the other through the sealing material layer, with the peripheral edge of one of the substrates corresponding to the peripheral edge of the specific portion of the other substrate being positioned within the range of the width of the specific section of the sealing material layer. The thus assembled substrates and sealing material layer are heated.

Abstract: A process for the manufacture of a liquid crystal container for a liquid crystal display element, which process comprises the steps of applying a low-melting glass frit paste to at least one of a pair of glass substrates, subjecting this glass substrate to primary firing in an open condition in which the paste is in no contact with any matters, and while holding the pair of the glass substrates in their accurate relative positions, subjecting the glass substrates to secondary firing to seal the pair of the glass substrates with the glass frit. The process preferably comprises the step of applying, prior to the step of secondary firing, a low-melting glass frit paste to one of the glass substrates so as to reliably hold the pair of the glass substrates in the accurate relative positions.

Abstract: A solder glass suspension for sealing glass or other ceramic parts is provided having the characteristics of a reversible gel, exhibiting high viscosity during storage and after extrusion onto a sealing surface, but relatively low viscosity under shear stress during extrusion. The use of the suspension for sealing glass or ceramic parts is also described.

Abstract: A magnetic head having a sputter-deposited glass film of the gap forming area of the magnetic core, said glass film being made of borosilicate glass having the composition consisting of 65-85 mol % of SiO.sub.2, 8-30 mol % of B.sub.2 O.sub.3 and containing 2-15 mol % of alkali metal oxide Na.sub.2 O and K.sub.2 O and 0.1-5 mol % of Al.sub.2 O.sub.3, with the molar ratio of boron oxide to alkali metal oxides being defined by the following formula: ##EQU1## The magnetic head provides sharpness of the recording leakage flux, thus giving excellent electromagnetic conversion characteristics.

Abstract: A seal glass for unitizing an array of glass nozzles of an ink jet printer. The seal glasses are corrosion resistant to alkaline and acidic inks, and have low softening points, medium high expansivities and anneal points and are compatible with the nozzle glasses.

Abstract: A process for preparing at least a double thickness glass design piece with a rounded surface comprising gluing together with a heat destructible glue first and second glass pieces with the same contours, the second piece being smaller than the first by a margin completely surrounding the larger of 1/8 inch, firing the two pieces with the second piece being on top to fuse them and until the top edge of the top piece has rounded into the bottom piece and gradually cooling the fused design piece to room temperature.

Abstract: A method and apparatus is provided for manufacturing microchannel-plate-iall structures (MIW's) wherein the electrical properties of the microchannel plate are protected by the localized application of a cover gas.

Abstract: A cathode ray tube has an envelope comprised of a first glass and a faceplate comprised of a second glass, both glasses having different thermal coefficients of expansion. The envelope and faceplate are joined by a cylindrical, stress-absorbing glass member flame-sealed at one end to the envelope and frit-sealed at the other end to the faceplate. Importantly, the thermal coefficient of expansion of the stress-absorbing member is less than the coefficients of either the envelope or the faceplate.

Abstract: A process for the manufacture of pole structures for magnetic transducing heads is described in which the configuration of the non-magnetic gaps is formed by abrading the ferrite pole structure through a mask to erode recesses in the gap area which have inclined walls. The final dimension of the gap defining face of one or the magnetic elements is determined by removing material from the masked face of the structure until the dimension between the recesses has the desired value.

Abstract: An inexpensive glass capacitive pressure sensor. Conductive capacitor electrodes are disposed on two flat glass plates, one serving as a diaphragm, the other as a substrate. The electrodes are positioned in a spaced apart, substantially parallel relationship to form the plates of a parallel plate capacitor. The glass plates are sealed together with a sealing glass mixture to bound a volume between the conductors. The volume is at a reference pressure, preferably a substantial vacuum. Differences between the pressure to be measured and this reference pressure cause a flexing of the glass diaphragm which is detected by measuring the capacitance between the two electrodes. A suitable sealing glass mixture which provides a hermetic seal between the glass plates is comprised of, in weight percent, 8-10 SiO.sub.2, 1-2 Al.sub.2 O.sub.3, 55-60 PbO, 7-9 PbF.sub.2, 7-10 ZnO, 4-6 CdO, and 10-15 B.sub.2 O.sub.3. The sealing glass mixture must be vacuum fined to permit hermetic sealing within a vacuum.

Abstract: An optical fiber coupler comprising a glass sleeve having a link piece of single material glass optical fiber having a refractive index higher than the sleeve mounted in a central section of the sleeve. The central section of the sleeve is collapsed to secure the link piece therein, leaving portions of the sleeve beyond the link piece of sufficient cross-section to freely receive optical fibers therein to be optically coupled. An index matching adhesive is used to secure the fibers in the sleeve abutting the link piece.

Abstract: A magnetic head is manufactured by depositing a layer of spacer material onto the facing surfaces of the magnetic cores; the thickness of each layer being approximately one-half the length of the intended gap and the thicknesses of both layers together being approximately equal to the thickness (length) of the gap. A layer of bonding glass is deposited onto the surfaces of the spacer layers and the cores are pressed together at an elevated temperature to fuse the glass layers and extrude most of the glass.

Abstract: A method for manufacturing a lead-through of a metal element consisting of a fernico alloy through a component of ceramic material. A suspension is supplied of glass powder having molar percentage compositions within defined limits. The suspension is deposited on the ceramic material at the area of the lead-through and the assembly is heated for several minutes in an nitrogen atmosphere at a temperature near 1000.degree. C. followed by cooling of the assembly to room temperature.

Abstract: A high impact sight glass assembly and production method are described, in which the glass lens is fused into an enamel coated metal ring such that the glass lens is fused to the enamel coating and the entire glass area is under compression. The glass lens is placed in the bore of a flange, and the lens and flange ring are heated, whereby the lens flows to conform to the bore of the flange and is fused to the enamel coating.

Abstract: An improved arc tube end seal and the method of forming that seal in a high pressure sodium discharge lamp is disclosed. The method includes precoating the refractory metal end cap with a slurry of metallic silicon and baking the end cap prior to accomplishing the bonding of the end cap to the arc tube with a conventional sealing frit.

Abstract: Bonding of an element comprising sapphire, ruby or blue sapphire to another element of such material with a eutectic mixture of aluminum oxide and zirconium oxide. The bonding mixture may be applied in the form of a distilled water slurry or by electron beam vapor deposition. In one embodiment the eutectic is formed in situ by applying a layer of zirconium oxide and then heating the assembly to a temperature above the eutectic temperature and below the melting point of the material from which the elements are formed. The formation of a sapphire rubidium maser cell utilizing eutectic bonding is shown.

Abstract: Glass or ceramic-to-metal composites or seals wherein the glass or ceramic is bonded to an iron base alloy consisting essentially of from 1-5% silicon and from 1-10% chromium, remainder iron. The alloy develops a thermal oxide film which consists essentially of chromium oxide and .alpha.Fe.sub.2 O.sub.3 which may comprise from 10 to 100% of the oxide film thickness on the metal. The invention also includes a process of bonding the glass or ceramic to the metal which eliminates the need of a prolonged heat treatment performed in a special atmosphere.

Abstract: A method of making a thin film magnetic head assembly having a spaced substrate and superstrate with a thin film magnetic transducer mounted therebetween by the steps of positioning at least one spacing member between the substrate and superstrate, placing a quantity of insulating bonding material of selected characteristics adjacent the spaced substrate and superstrate and controllably heating the substrate, superstrate, thin film magnetic transducer and spacing member sub-assembly to a bonding temperature located in a bonding temperature range and maintaining the sub-assembly at a bonding temperature to enable the bonding material to substantially fill the space by capillary action thereby encapsulating the thin film magnetic transducer bonding the substrate, superstrate and thin film magnetic transducer into an integral assembly is shown.

Abstract: A method of bonding hard and/or soft magnetic ferrite parts comprises the steps of applying an oxide glass which contains iron oxide in an amount corresponding to about 50 to about 200% of the iron oxide proportion in the eutectic point of the respective glass-forming multi-component system, about 0.4 to about 0.8 mole percent of a wetting agent selected from the group consisting of SiO.sub.2, P.sub.2 O.sub.5 and B.sub.2 O.sub.3 and about 0.1 to aout 0.4 mole percent of alkali oxides BaO, SrO, CaO, K.sub.2 O, Na.sub.2 O and Li.sub.2 O to at least one of the surfaces to be bonded together. The oxide glass may be applied prior to or after prefiring or main firing and the frit or the raw material weight-in quantity of the glass may be used. Finally, the ferrite parts are fused at temperatures in excess of the glass softening point.

Abstract: A method and apparatus for coating a seal edge of a funnel portion of a television cathode ray tube with frit slurry, which method includes the steps of arranging at least one pair of nozzle bodies containing frit slurry adjacent to the seal edge, predetermining initial points and terminal points on the seal edge corresponding to the number of pairs of nozzle bodies, moving the paired nozzle bodies from one of the initial points, in opposite directions, along the seal edge while discharging the viscous material on the seal edge and having two of the nozzle bodies meeting each other at one of the terminal points. The whole seal edge is in this manner coated with a continuous uniform layer of frit slurry.

Abstract: An output/input coupler for multi-mode glass fibers characterized by a substrate, a main line having at least one flat surface, and at least one branch line having one flat surface. The main line and branch line are arranged on the substrate with the flat surfaces being in spaced parallel facing relationship. Preferably, the main line has the square cross section and the flat surface of each branch line extends at an angle to the axis of the branch line so that the branch line has a wedge-shaped configuration in the plan view. A transparent material may be imposed in the space between the spaced parallel facing surfaces of the main and branch lines. This transparent material may be a liquid crystal material whose optical properties are changed by the application of an electric field created by a pair of electrodes which overlie the space between the parallel facing surfaces.

Abstract: Marginal edge portions of a pair of glass sheets are welded together to make a multiple glazed unit by sequentially imposing a voltage on marginal edge portions of a sheet followed by alternately imposing a voltage on opposed corners of the sheet.

Abstract: Marginal edge portions of a pair of glass sheets are welded together to make a multiple glazed unit by sequentially imposing a voltage on marginal edge portions of a sheet during side heating cycles followed by alternately imposing a voltage on opposed corners of the sheet during diagonal heating cycles. During the last side heating cycle, the voltage applied to the next to last marginal edge heated is for a shorter time period than the time period in which the first marginal edge was heated. In this manner, the average resistance of the electrical paths during the first diagonal heating cycle is substantially equal.

Abstract: A method of controlling the spacing between the panels in large area liquid crystal cells consisting of the application of an array of spacer dots on one panel and an array of tie dots on the other panel. Upon firing the panels, the spacer dots remain rigid to define the spacing whereas the tie dots soften and deform.

Abstract: The lifetime of multiple capillary nozzle assemblies embedded in a glass mass, of a multiple nozzle ink-jet printer, can be increased and the thermal and mechanical compatibility of the resulting package enhanced by fabrication of the nozzles from glass compositions comprised of SiO.sub.2, ZrO.sub.2, Na.sub.2 O, K.sub.2 O and MgO. Inclusion of ZrO.sub.2 as well as minor amounts of BaO, MgO, CaO, and Al.sub.2 O.sub.3 enhances the alkali resistance of the glass nozzles. Also, the high SiO.sub.2 content of the glasses combined with the presence of ZrO.sub.2, MgO, CaO, and Al.sub.2 O.sub.3 imparts an acid resistance to the nozzles.

Abstract: A sealing glass and a sealing glass paste for sealing the face plate and funnel portion of a color television tube wherein PbO-containing sealing glass frit contains from an effective amount of a powder, such as Pb.sub.3 O.sub.4 powder, which powder prevents the reduction of PbO to Pb metal during the sealing process, which reduction would otherwise result in a dielectric breakdown in the seal. A sealing glass paste consisting essentially of a PbO--B.sub.2 O.sub.3 --ZnO sealing glass frit and containing an effective amount of said powder, based upon the weight of the frit, together with hydroxypropyl cellulose binder for the frit and a solvent for the binder. A method for sealing the face plate of a color television tube to its funnel portion with a PbO-containing solder glass wherein the reduction of PbO to metallic lead during the sealing step is obviated by the addition of a sufficient amount of Pb.sub.3 O.sub.4 or BaO.sub.2 powder in the solder glass and paste made therewith, which Pb.sub.3 O.sub.

Abstract: An electrical terminal device comprises a metallic body or support cut through which an iron-chronmium alloy, conductive lead wire extends in an insulated and sealed manner. The free ends of the lead wire or wires extend out of the cup. A glass-to-metal seal is provided between the wires and the cup. The free ends of the lead wires are partially plated or coated with a layer of an oxidation resistant metal. A portion intermediate the free ends is provided with a layer of chromium oxide to improve the seal between the lead wire and a fused glass bead held in an aperture in said support cup. The method of manufacturing such devices comprises partially plating a nickel, copper or other metal which is resistant to oxidation in a hydrogen atmosphere at high temperature and humidity, on the surface of the terminal end portions of the lead wires, while the intermediate portion where the conductor is secured to a glass bead is left free of such a plating.

Abstract: A method for bonding together a pair of members comprising positioning a layer of soldering glass between the pair of members, melting the glass, bonding the members into the molten glass and cooling the members. One of the members may be conductive with the soldering glass coated thereon, or the soldering glass may be coated on a conductive element which becomes bonded between the pair of members.

Abstract: The alpha alumina part is heated to between 1400.degree. C and 1600.degree. C for 10 to 20 hours in a mass of alkaline carbonate or aluminate. It is then disposed in contact with a blank of the alkaline beta alumina part in a sintering enclosure suitable for establishing an atmosphere which is rich in alkaline metal and in heating this enclosure to between 1600.degree. C and 1700.degree. C for between 30 minutes and 4 hours, so as to sinter the alkaline beta alumina part while effecting the connection thereof to the alpha alumina part. The invention is used in manufacturing sodium-sulphur type electric cells.

Abstract: A sealing glass composition comprises a PbO-containing glass frit, two particulate refractory fillers having controlled particle size distributions, and optionally at least one additive to prevent the chemical reduction of the PbO when the frit is fired in the presence of reducing conditions. The sealing glass composition is useful as a package sealant. It is especially useful as a solder glass for sealing a face plate portion to a funnel portion of a color television picture tube at temperatures of about 400.degree. C. A particulate glass composition for use in preparing the sealing glass composition, a sealing glass paste and methods of using the sealing glass and paste are provided.

Abstract: There is disclosed an improved gaseous discharge display panel device and process of manufacturing same. A large number of cathode substrate electrode and mask structures are printed and fired on a single glass sheet, the electrodes being printed first and dried/cured at a higher temperature than subsequently applied mask and electrical crossovers, which are cured at lower temperatures. Upon completion of fabrication of the electrode and dielectric mask structures and crossover connections, the glass plate is simply scored and separated to provide individual back substrate and electrode mask structures which are then assembled with a like formed annode plate structure. Individual devices are then assembled with use of a seal rod preformed to have a gap in the seal structure and a laser facturable mercury dispensing giver.

Abstract: The novel embodiments disclosed herein also illustrate a novel method for making a recuperator structure. A multiplicity of elongated tubes are formed of a glass that is thermally crystallizable to a low expansion glass-ceramic. In one embodiment, each of the tubes is sealed at each end and contains an expansible fluid medium. Each of the tubes has a portion intermediate the ends thereof which is substantially straight. Pluralities of the multiplicity of tubes are tightly packed into a first plurality of layers with the axes of the intermediate portions of the tubes in each layer essentially parallel to each other. The first plurality of layers are arranged with the straight intermediate tube portions thereof in a stacked array with respect to each other, and with the axes of the intermediate portions of the tubes in each layer essentially parallel to the axes of the corresponding intermediate tube portions in the other first plurality of layers.

Abstract: Glass substrates having electrical conductors deposited thereon used in gas panel fabrication with vitreous or crystalline solder glass attached thereto are disclosed as well as a method of applying and attaching said solder glass to such substrates.

Abstract: Disclosed is a ceramic structural material, which is particularly useful in combination with an assembly or matrix of integrally fused tubes forming a series of longitudinal parallel passageways. Also disclosed is a method for making such ceramic structural material from rods and frit that are thermally crystallizable into a glass-ceramic. One embodiment of the method involves bundling the rods into a desired configuration, with the frit interposed in the interstices between the rods, and heating the combined rod-frit bundle to sinter or fuse the rods and frit together in a heat treatment schedule that also nucleates and thermally crystallizes the fused rod-frit structure to the final ceramic product. A gas turbine regenerator comprising a combination of the ceramic structural material and a matrix is also disclosed along with the method of making same.

Abstract: A stacking method is employed to assemble a structure which includes a plurality of substantially identical, uniformly spaced parallel glass plates. The method includes the use of a fixture having a slotted surface in which rigid cylindrical spacers can be slidably disposed. Each glass plate is placed with its edge surface on the slotted surface and spaced from the adjacent plates by at least two of the cylindrical spacers, each of the spacers being disposed in a separate slot. Reference planes which are perpendicular to the surface of the fixture are provided so as to maintain the plates in the desired spatial relation. Then, a glass base is bonded onto the opposing edge surface of each of the spaced glass plates. The glass plates and glass base are preferably chosen to be of the same material. The spacers are chosen to be of a material having an expansion coefficient slightly greater than that of the glass plates and glass base.