Abstract: The present invention relates to a glass having a refractive index of at least 1.7 as well as the use of the glass as a cladding glass of a solid-state laser. The invention also relates to a laser component comprising a core of doped sapphire and a cladding glass being placed on said core. The cladding glass is arranged on said core such that light exiting from the core due to parasitic laser activity can enter the cladding glass and can be absorbed there. The present invention also relates to a method for producing the laser component.

Abstract: An optical glass having a small partial dispersion ratio (?g,F), while having a refractive index (nd) and Abbe number (?d) within desired ranges, is obtained. The optical glass, in mol %, comprises 20.0 to 65.0% of an SiO2 component, 1.0 to 25.0% of an Nb2O5 component, and 1.0 to 35.0% of an Na2O component, and has a refractive index (nd) of 1.62 to 1.75, an Abbe number (?d) of 30 to 42, and a partial dispersion ratio (?g,F) of no greater than 0.594.

Abstract: Titanium oxide containing borosilicate glasses, which have been produced without the use of arsenic and antimony compounds, are provided. An environmentally friendly refining method for providing titanium oxide containing borosilicate glass is also provided. The method includes using oxygen containing selenium compounds as refining agents to provide glasses with good transmittance values in the infrared range and show no disturbing discolorations. The glasses of the present disclosure are particularly suitable for the production of IR light conductors, cover glasses for photo sensors, and UV filters.

Abstract: Provided is a medium-refractive-index low-dispersion optical glass that may be precision press-molded, that has a high water resistance, and that has a low specific gravity, as well as a preform for precision press molding and an optical element which use such an optical glass. The optical glass has a composition including, in % by mass, SiO2: 35 to 55%, B2O3: 12 to 27%, Al2O3: 6 to 16%, Li2O: 5 to 12%, MgO: 0 to 10%, CaO: 5 to 17%, ZrO2: 0 to 7%, La2O3: 0 to 7%, ZnO: 0 to 5%, TiO2: 0 to 5%, Nb2O5: 0 to 5%, and Ta2O5: 0 to 5%. SrO and BaO are not included.

Abstract: Ion exchangeable glass articles are disclosed. In one embodiment, a glass article formed from alkali aluminosilicate glass which may include Ga2O3, Al2O3, Na2O, SiO2, B2O3, P2O5 and various combinations thereof. The glass article may generally include about X mol % of Ga2O3 and about Z mol % of Al2O3, wherein 0?X?20, 0?Z?25 and 10?(X+Z)?25. The glass article may also include from about 5 mol % to about 35 mol % Na2O, SiO2 may be present in an amount from about 40 mol % to about 70 mol % SiO2. The glass article may further include Y mol % B2O3 where Y is from 0 to about 10. The glass article may further include (10-Y) mol % of P2O5. Glass articles formed according to the present invention may be ion-exchange strengthened. In addition, the glass articles may have a low liquid CTE which enables the glass articles to be readily formed into complex shapes.

Abstract: An optical glass, comprising, denoted as cation percentages: a content of Si4+ and B3+ (35 to 55); a combined content of La3+, Gd3+, and Y3+ (30 to 55), wherein Gd3+ is 5 to 20%; a content of Ti4+, Nb5+, Ta5+ and W6+ (7 to 20); Zr4+ (2 to 8); and Zn2+ (0 to 10); wherein a cation ratio of Zn2+ to Gd3+ is 0 to 0.80; a cation ratio of Gd3+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0.65 to 2.00; a cation ratio of Ta5+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0 to 0.30; a cation ratio of Ti4+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0.30 to 0.90; and a refractive index nd is 1.890 to 1.950, and an Abbé number ?d of equal to or lower than 39.0, the Abbé number ?d satisfying a relation of ?d?(2.334?nd)/0.012 relative to nd.

Abstract: The invention relates to red-dyed glass, comprising the components of a base glass, coloring additives, reductants, and stabilizers, wherein the coloring additives comprise copper oxides and neodymium oxides and wherein the reductants comprise tin oxides and wherein the stabilizers comprise antimony oxides, wherein the fraction of the copper oxides in the red-dyed glass is between 0.02 and 0.08 weight percent.

Abstract: A housing/enclosure/cover can include an ion-exchanged glass exhibiting the following attributes (1) radio, and microwave frequency transparency, as defined by a loss tangent of less than 0.03 and at a frequency range of between 15 MHz to 3.0 GHz; (2) infrared transparency; (3) a fracture toughness of greater than 0.6 MPa·m1/2; (4) a 4-point bend strength of greater than 350 MPa; (5) a Vickers hardness of at least 450 kgf/mm2 and a Vickers median/radial crack initiation threshold of at least 5 kgf; (6) a Young's Modulus ranging between about 50 to 100 GPa;; (7) a thermal conductivity of less than 2.0 W/m° C., and (9) and at least one of the following attributes: (i) a compressive surface layer having a depth of layer (DOL) greater and a compressive stress greater than 400 MPa, or, (ii) a central tension of more than 20 MPa.

Abstract: The borosilicate glass for pharmaceutical packaging has a transmission ? in the visible range of more than 80% at a wavelength of 400 nm, a transmission ? in the UV range of at most 0.1% at wavelengths under 260 nm (each at a sample thickness of 1 mm), a transformation temperature Tg of 550° C. to 590° C. and a processing temperature VA of 1100° C. to 1200° C. The glass has a composition, in wt. % on an oxide basis, of SiO2, 60-80; B2O3, 5-15; Al2O3, 2-10; TiO2, 0.5-7; ? Li2O+K2O+Na2O, 3-10; ? alkaline earth oxides, 0.5-10; ZrO2, 0-3; and Fe2O3, 0-0.2. The glass is suitable for packaging UV-sensitive substances but nevertheless permits optical quality control.

Abstract: An optical glass has a refractive index (nd) of 1.60 or over and excellent transmittance and internal quality. The optical glass comprises 0.1-4 mass % of Ta2O5 to total mass of glass calculated on oxide basis, has ratio of 0.95<Ta2O5/(Ta2O5+(ZrO2)+TiO2+Nb2O5+WO3)×5)?1.00, and further comprises SiO2+B2O3+Al2O3+BaO in a total amount of 81% or over.

Abstract: A glass composition of the present invention includes the following components, in terms of mass % and mass ppm: 60 to 79% SiO2; 0 to 13% B2O3 (exclusive of 13%); 0 to 10% Al2O3; 0 to 10% Li2O; more than 0% but not more than 20% Na2O; 0 to 15% K2O; 0 to 10% MgO; 0 to 15% CaO; 0 to 15% SrO; 0 to 15% BaO; 0 to 10% ZnO; 0 to 15% Nb2O5; 0 to 20% Ta2O5; more than 0.02% but not more than 10% TiO2; and 0.5 to 50 ppm T-Fe2O3 (where T-Fe2O3 denotes a total iron oxide obtained by converting all of iron compounds into Fe2O3).

Abstract: A glass fiber having a low dielectric constant and low dielectric loss tangent consists essentially of by weight, as a glass composition, 52 to 60% of SiO2, 11 to 16% of Al2O3, 20 to 30% of B2O3, and 4 to 8% of CaO, and substantially no MgO, substantially no Li2O, substantially no Na2O, substantially no K2O, and substantially no Ti2O. The glass fiber also may contain up to 2% F2 by weight. The glass fiber is ideal for use as reinforcement for printed wiring boards, and has excellent dielectric properties at frequencies of about 18 GHz or higher.

Abstract: A bioactive glass having a composition substantially comprising 30 to 60 mol % of CaO, 40 to 70 mol % of SiO2 and 20 mol % or less of Na2O has low glass transition temperature and/or crystallization temperature, and a sintered calcium phosphate obtained by using the bioactive glass as a sintering aid has excellent biocompatibility, mechanical strength and sinterability.

Abstract: A method of treating sensitive teeth includes (1) attaching a fluoride releasing glass composition to a person's tooth, and (2) allowing fluoride to be slowly released over time in order to reduce chronic and/or acute tooth sensitivity. A preferred glass composition comprises the general empirical formula given below, expressed in approximate weight percent of the element: P: 16-24, F: 5-30, O: 20-40 and at least one of Na, K, Li, or Al in an amount up to a total of about 40 weight percent and optionally, up to about 5 weight percent of boron and/or silicon.

Abstract: The invention relates to a photostructurable body, in particular glass or glass-ceramic, in which the glass is a multicomponent glass and/or the glass-ceramic is a multicomponent glass-ceramic, in each case having a positive change in refractive index ?n as a result of the action of light.

Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.

Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43 W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.

Abstract: A glass composition having the general empirical formula given below, expressed in weight percent of the element: P: 16–24, F: 5–30, O: 20–40 and at least one of Na, K, Li or Al in an amount up to a total of 40 wt. % and optionally, up to 5 wt. % of boron and/or silicon. The composition may be used for the treatment and/or prevention of dental caries by providing a slow fluoride releasing device that may be attached to a tooth to release fluoride into the saliva or an individual.

Abstract: The invention relates to an antimicrobial, anti-inflammatory and disinfecting glass, whereby the glass comprises: 30–95 wt. % SiO2,0–40 wt. % Na 2O, 0–40 wt. % K2O, 0–40 wt. % Li2O, 0–35 wt. % CaO, 0–10 wt. % MgO, 0–10 wt. % Al2O3, 0–15 wt. % P2O5 wt. % B2O3?, 0–10 wt. % NaF, 0–10 wt. % LiF, 0–10 wt. % KF, 0–10 wt. % CaF2, 0–5 wt. % Ag2O, 0–10 wt. % MgF2,0–2 wt. % Fe2O3and 0–10 wt. % XJy, where X?Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Ag or Zn and y=1 or y=2 and the sum of XJy> is 10 ppm.

Abstract: The aluminum-free borosilicate glass has a composition in percent by weight based on oxide content of: SiO2, 65–77; B2O3, 7–20; Li2O, 0–2; Na2O, 0–4; K2O, 3–12; MgO, 0–2; CaO, 0–2; with MgO+CaO, 0–3; BaO, 0–3; ZnO, 0–2; ZrO2, 0.8–12; TiO2, 0–10; CeO2, 0–1; and F?, 0–0.6. This glass advantageously has a coefficient of thermal expansion ? (20° C.; 300° C.) of between 3.0×10?6/K and 6×10?6/K, good chemical resistance and a working point VA of between 990° C. and 1290° C.

Abstract: The invention concerns an optical colored glass with a composition (in percent by weight based on oxide) of SiO2 30–75; K2O 5–35; B2O3>4–17; ZnO 5–37; F 0.01–10; CdO 0.1–1, S+Se+Te 0.1–1.5 as well as the use of this glass as a long-pass cutoff filter.

Abstract: An alkaline-earth aluminosilicate glass having a composition (in % by weight, based on oxide) of SiO2>55-64; Al2O3 13-18; B2O3 0-5.5; M5O 0-7; CaO 5.5-14; SrO 0-8; BaO 6-17; ZrO2 0-2; CeO2 0-0.3; TiO2 0-0.5; CoO 0.01-0.035; Fe2O3 0.005-0.05; and NiO 0-0.

Abstract: The invention relates to a bioactive glass as additive for polymers, wherein the bioactive glass contains 40 to 90 percent by weight SiO2; 4 to 45 percent by weight CaO; 0 to 35 percent by weight Na2O; 2 to 16 percent by weight P2O5; 0 to 25 percent by weight CaF2; 0 to 10 percent by weight B2O3; 0 to 8 percent by weight K2O and/or 0 to 5 percent by weight MgO. The invention also relates to a polymer comprising bioactive glass, wherein 1 to 30 percent by weight of bioactive particles are contained in relation to its overall weight The invention further relates to the utilization of bioactive glass in households, packaging, food processing, sealing materials, garments, medicine, sanitation, automotive industry, building industry, plastic coatings and adhesives.

Abstract: The invention relates to the use of ions of weakly basic oxides as linking ions for polyacids in cements, preferably polyelectrolyte cements. Suitable ions comprise elements of the scandium series, for example, Sc3+, Y3+, La3+, Ce4+ and all subsequent tri- and tetra-valent lanthanides and the ions Mg2+, Zn2+, Ga2+, In2+. The application of said ions permits a regulation of the cement reaction without surface treatment of the glass powder.

Abstract: An optical colored glass with a composition (in percent by weight based on oxide) of SiO2 30-75; K2O 5-35; TiO2 0-5; B2O3>4-17; ZnO 5-37; F 0.01-10 MIMIIIY2II 0.1-3, whereby MI=Cu+, Ag+, MIII=In3+, Ga3+, Al3+, YII=S2−, Se2−, Te2−, as well as the use of this glass as a long-pass cutoff filter.

Abstract: An optical glass having a positive anomalous dispersion comprises, in mass %, 1 SiO2 40-60% B2O3 3-9% TiO2  3-15% Nb2O5 0.1-5.0% Al2O3  3-15% WO3 0.5-5.

Abstract: Potassium-zinc-silicate glasses are described which because of their high chemical stability as well as their optical properties and favorable working properties are suitable in particular as coating or veneering materials for ceramic dental suprastructures and thus for the preparation of all-ceramic dental restorations, such as crowns or bridges.

Abstract: An optical colored glass with a composition (in percent by weight based on oxide) of SiO2 30-75; K2O 5-35; TiO2 0-5; B2O3>4-17; ZnO 5-37; F 0.01-10 MI MIII Y2II 0.1-3, whereby MI=Cu+, Ag+, MIII=In3+, Ga3+, Al3+, YII=S2−, S2−, Te2−, as well as the use of this glass as a long-pass cutoff filter.

Abstract: The invention concerns an optical colored glass with a composition (in percent by weight based on oxide) of

Abstract: The invention concerns an optical colored glass of the composition (in % in weight on oxide basis) SiO2 50-62; K2O 10-25; Na2O 0-14; Al2O3 0-2; B2O3 3-5; ZnO 13.5-37; F 0-1; TiO2 0-7; In2O30-2; Ga2O3 0-2; SO30-1; SeO20-1; C 0-1; MIMIIIY2II 0.1-3, whereby MI=Cu+ and/or Ag+ and/or MIII=In3+ and/or Ga3+ and/or Al3+ and/or YII═S2− and/or Se2− and at least 0.1% in weight of the oxide (M2O3) of the MIII, which is/are present in MIMIIIYII2, and with at least 0.2% in weight of the oxide, of the YII, which is/are present in MIMIIIYII2.

Abstract: According to one aspect of the present invention an optically active glass contains Sb2O3, up to about 4 mole % of an oxide of a rare earth element, and 0-20 mole % of a metal halide selected from the group consisting of a metal fluoride, a metal bromide, a metal chloride, and mixtures thereof, wherein this metal is a trivalent metal, a divalent metal, a monovalent metal, and mixtures thereof. In addition, any of the glass compositions described herein may contain up to 15 mole % B2O3 substituted for an equivalent amount of Sb2O3.

Abstract: An article of manufacture that has a component capable of being sealed with a copper aluminosilicate glass. The sealing glass has a coefficient of thermal expansion (CTEs) of in the range between 20-82×10-7/° C., over a range of 25-500° C.) and a softening points in the range of 660-1000° C. The glass has a composition consisting essentially, in terms of weight percent on an oxide basis, of 35-68 SiO2, 3-25 Al2O3, 2-26 B2O3, 0-20 R2O, 0-30 RO, 2-33 CuO, 0-4 F, 0-10 MxOy, where R2O is an alkali oxide selected from the group consisting of Li2O, Na2O, and K2O, and RO is an alkaline earth oxide selected from the group consisting of CaO, MgO, ZnO, SrO, and BaO, and MxOy is a transition metal oxide selected from the group consisting of Co2O3, TiO2, NiO, MnO2, and Fe2O3. The present invention also pertains to a method of sealing the article.

Abstract: The object of the present invention is colorless inorganic glasses, as well as products manufactured from said glasses. Said glasses are of the type containing copper halides or copper cadmium halides and having a sharp optical absorption cutoff between 370 nm and 425 nm essentially having the composition below, expressed in cationic percentages: 23-73% SiO2 15-45% B2O3  0-24% Al2O3  0-12% Li2O  0-20% Na2O  0-12% K2O 0-5% CaO + BaO + SrO 0.125-1%    Cu2O 0-1% CdO 0-5% ZrO2 with   0-1.75% Cl 0.

Abstract: A glass consisting essentially of antimony oxide. An optically active glass consisting essentially of antimony oxide and up to about 4 mole % of an oxide of a rare earth element. A rare earth-doped, antimony oxide-containing glass including 0-99 mole % SiO2, 0-99 mole % GeO2, 0-75 mole % (Al, Ga)2O3, 0.5-99 mole % Sb2O3, and up to about 4 mole % of an oxide of a rare earth element. The oxide of the rare earth element may comprise Er2O3. The glass of the invention further includes fluorine, expressed as a metal fluoride. An optical energy-producing or light-amplifying device, in particular, an optical amplifier, comprising the above-described glass. The optical amplifier can be either a fiber amplifier or a planar amplifier, either of which may have a hybrid composition. Embodiments of the glass of the invention can be formed by conventional glass making techniques, while some of the high content antimony oxide embodiments are formed by splat or roller quenching.

Abstract: The present invention provides a new and improved lead-free and cadmium-free glass enamel composition that displays good flow at traditional glass enamel firing temperatures and upon firing produces an enamel finish that displays no cracking, good chemical resistance, good weatherability, and improved color values. The glass enamel composition of the present invention includes a glass component, an oxidizer, a pigment system, and optional vehicles and fillers. The presence of the oxidizer in the composition, which can be included as part of the glass component, as a separately added material, or both, improves the color values of the fired enamel as compared to enamels formed using similar glass enamel compositions having no oxidizer present.

Abstract: A novel silica based bioactive glass composition that can be used in conjunction with a delivery agent such as a toothpaste, gel saliva, etc. having a particle size range <90 &mgr;m which will form a rapid and continuous reaction with body fluids due to the immediate and long term ionic release of Ca and P from the core silica particles, to produce a stable crystalline hydroxy carbonate apatite layer deposited onto and into the dentin tubules for the immediate and long term reduction of dentin hypersensitivity.

Abstract: Zinc-containing optical glass materials with a refractive index nd between 1.52 and 1.66, an Abbe number &ngr;d of between 35 54 and a composition (in % by weight based on oxide) of: SiO2 38-58, ZnO 0.3-42, PbO 0-<30, ZnO+PbO 20-55, Li2O 0-<3, Na2O 0-14, K2O 0-12, Li2O+Na2O+K2O≧2, F 0-3, MgO 0-6, CaO 0-<5, SrO 0-6, BaO 0-<0.9, B2O3 0-<1, Al2O3 0-<1.5 and ZrO2 0-<2 and, if appropriate, refining agents in the customary amounts.

Abstract: The object of the present invention is brown solar glasses, absorbing UV or IR radiation, as well as solar ophthalmic lenses in said glasses. Said glasses have the following composition, expressed in percentages by weight: SiO2: 64-71; B2O3: 2-8; Al2O3: 0-4; ZrO2: 0-2; Li2O: 0-4; Na2O: 6-10; K2O: 7-16; CaO: 0-5.5; ZnO: 0-5.5; TiO2; 0-2; Fe2O3: 3-9; Co3O4: 0-0.030; NiO: 0-0.2; SeO2: 0.0030-0.1; As2O3: 0-0.1; Sb2O3: 0-0.1; SnO2: 0-0.1; Cl: 0-2; Br: 0-2; F: 0-2.

Abstract: A glass composition comprising, in mole percent of the total composition: glass-forming compounds in a total amount of 75 to 85%, wherein said glass forming compounds comprise 40 to 65% SiO2, 10 to 20% Bi2O3 and 0.1 to 3% Al2O3, and glass modifiers in a total amount of 15 to 25%, wherein said glass modifiers comprise 1 to 23 % ZnO, 0.1 to 5% CuO, 0.1 to 5 CaO and 0.1 to 2% MgO, thick film formulations containing said composition and uses thereof.

Abstract: A process for making bioactive glasses is described including preparing a reaction mixture of reactants capable of forming a sol-gel, aging the reaction mixture, near equilibrium drying a gel resulting from the reaction mixture, and heating the -near equilibrium-dried gel described. Also described are near equilibrium-dried bioactive glass compositions.

Abstract: The present invention provides a porcelain enamel coating composition for use in forming a coating composition upon a metal substrate having an infrared reflectivity of at least 50% at 2.5 .mu.-microns measured with a Perkin Elmer Lambda 19 UV/VIS/NIR spectrometer with a labsphere RSA-PE 19 reflectance spectroscopy accessory. The coating composition comprises a glass component and a separate and distinct addition of cerium oxide. Preferably, the coating composition comprises from about 0.20% to about 3.0% by weight of the cerium oxide.

Abstract: A transparent class ceramic composition includes an oxide component, a rare earth component, a halide component, and a substantially pure rare earth-halide (e.g., REF.sub.3) crystal component. A method for making a transparent oxyfluoride glass includes preparing an oxyfluoride glass containing rare earth ions by a conventional melting method and subjecting the glass to a heat treatment thereby precipitating fluoride fine crystals containing a large amount of rare earth ions.

Abstract: The invention relates to glasses which absorb UV radiation and which have the following composition, in wt. %: SiO.sub.2 30-52; ZnO 0-8; B.sub.2 O.sub.3 12-22; PbO 0-2; ZrO.sub.2 5-14; Y.sub.2 O.sub.3 0-15; Al.sub.2 O.sub.3 0-12; La.sub.2 O.sub.3 5-25; Li.sub.2 O 1.5-3.5; TiO.sub.2 0-2; Na.sub.2 O 0-6; HfO.sub.2 0-2; K.sub.2 O 2-9; Nb.sub.2 O.sub.5 0-2; MgO 0-5; Ta.sub.2 O.sub.5 0-2; CaO 0-5; MoO.sub.3 0-2; SrO 0-9; WO.sub.3 0-2; BaO 0-14; SnO 0-4; Sb.sub.2 O.sub.3 0-4; SnO.sub.2 0-4; AS.sub.2 O.sub.3 0-4; CdO 0-1; CuO 0.15-1; F 0-2; Cl 0-3; Br 0-3; I 0-2 with the following conditions: Li.sub.2 O+Na.sub.2 O+K.sub.2 O (X.sub.2 O) 7-14; MgO+CaO+SrO+BaO (XO) 12-20; ZrO.sub.2 +Al.sub.2 O.sub.3 <15; F+Cl+Br+I 0.2-4.0; TiO.sub.2 +PbO+Nb.sub.2 O.sub.5 .ltoreq.2; AS.sub.2 O.sub.3 +Sb.sub.2 O.sub.3 +SnO.sub.2 +SnO 0.05-4.0 and a ratio R=(M.sub.2 O+2MO-Al.sub.2 O.sub.3 -ZrO.sub.2)/B.sub.2 O.sub.3 where M.sub.

Abstract: A pharmaceutical preparation, including a glass phase which is bioactive silica containing glass in the form of a paste, suspension or solution mixed in a physiologically suitable liquid or bound to a physiologically suitable vehicle, and which preparation reduces the pulpal irritation or a tooth and/or strengthens the structure of a tooth. Bioactive silica containing glass may be a material which contains only Si-oxide or Si-hydroxide and which allows the formation and movement of Si--OH-groups. Preferably, the preparation also contains calcium and phosphate sources.

Abstract: A novel silica based bioactive glass composition that can be used in conjunction with a delivery agent such as a toothpaste, gel saliva, etc. having a particle size range <90 .mu.m which will form a rapid and continuous reaction with body fluids due to the immediate and long term ionic release of Ca and P from the core silica particles, to produce a stable crystalline hydroxy carbonate apatite layer deposited onto and into the dentin tubules for the immediate and long term reduction of dentin hypersensitivity.

Abstract: A bone grafting material for use in medicine is glass wool which has the mean diameter of 100 .mu.m or less and whose composition is:SiO.sub.2 40-62% (w/w)Na.sub.2 O 10-32% (w/w)CaO 10-32% (w/w)P.sub.2 O.sub.5 0-12% (w/w)CaF.sub.2 0-12% (w/w)B.sub.2 O.sub.3 0-20% (w/w),When the grafting material is used for treatment of periodontal disease, the grafting material is completely replaced by newly formed bone, whereby dental ankylosis of the grafting material to a tooth root does not occur and the newly formed bone and the tooth root are bound with a tissue like a periodontal membrane.

Abstract: The present invention relates to a rare earth-containing, alkali silicate frit which may be applied to a metal substrate to provide a porcelain enamel coating which has good thermal stability, an acid resistance of A on the PEI scale and improved cleanability, wherein the frit contains, based on the total weight of the frit:______________________________________ Oxide Wt. % ______________________________________ R.sub.2 O 10-30 MgO 0-5 B.sub.2 O.sub.3 0-5 SiO.sub.2 45-60 TiO.sub.2 0-10 F 0.5-5 CoO 0-3 NiO 0-5 X 12-30 ______________________________________whereinR represents an alkali metal andX represents a rare earth oxide having an atomic number of 57-60, preferably cerium oxide.The present invention is also directed to porcelain enamel coatings, especially for appliances, prepared from this rare earth-containing, alkali silicate frit.

Abstract: Zinc-containing, lead- and cadmium-free glass frits with a softening point of less than 510.degree. C. are disclosed. Obligatory components of the glass-frit composition are 31-50 mole % ZnO, 10-44 mole % SiO.sub.2, 11-35 mole % B.sub.2 O.sub.3 and 11-25 mole % Na.sub.2 O. The glass frits can be used as base frit for the production of decorative coating masses which can be stoved below 630.degree. C., preferably masses for the decorating of glass.

Abstract: The invention provides: a glass composition comprising about 20 to about 85% of SiO.sub.2, about 2 to about 75% of B.sub.2 O.sub.3, about 15% or less of Al.sub.2 O.sub.3, about 30% or less of at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O and Cs.sub.2 O, about 0.1 to about 10% of ZnO, about 10% or less, calculated as total amount in combination with ZnO, of at least one of MgO, CaO, BaO, SrO and PbO, about 10% or less of at least one of ZrO.sub.2, La.sub.2 O.sub.3, Y.sub.2 O.sub.3, Ta.sub.2 O.sub.3 and Gd.sub.2 O.sub.3, and about 0.05 to about 15% of at least one copper halide.

Abstract: A CeO.sub.2 -containing enamel frit is disclosed which, upon enamelling, produces an opaque enamel coating with excellent adhesion and acid resistance. The frit can be used to enamel an unpickled or lightly pickled steel plate or article.