Abstract: Bismuth oxychloride nacreous pigment coated with a rare earth metal compound is described. The coated pigment is prepared by adding a rare earth metal salt solution to a suspension of bismuth oxychloride pigment crystals to form a further suspension containing the pigment crystals and cerium hydroxide. The cerium hydroxide is then precipitated out of the further suspension to coat the pigment crystals. The coated pigment is endowed with improved weather fastness.

Abstract: The present invention relates to a novel method of manufacturing a composite body, such as a ZrB.sub.2 -ZrC-Zr composite body, by utilizing a post-treatment technique which may improve the oxidation resistance of the composite body. Moreover, the invention relates to novel products made according to the process. The novel process modifies at least a portion of a composite body by exposing said body to a source of second metal.

Abstract: The present invention provides an improved fuel cell electricity generation rocess which includes a desulfurizer, an adsorber, a reformer, a shift converter, and a fuel cell wherein reformed gas from the reformer is treated using a non-porous gas separation membrane comprising a polymer in place of the converter at a temperature of 50.degree.-150.degree. C. and a pressure of 2-10 kg/cm.sup.2 to separate carbon monoxide contained in the reformed gas.

Abstract: A process for superpolishing hard ceramic substrates, and super polished substrates having surface finishes below about 20 angstroms RMS. The process comprises applying a pitch to a lap tool and forming channels in the pitch. The pitch is wetted with a polishing compound comprising colloidal alumina and powder of a substance harder than that being polished. The substrate is brought into contact with the wetted pitch, and a relative motion is applied thereto to polish the substrate.

Abstract: A method for producing an oxide superconductor formed according to a chemical composition formula (R.sub.1-x Ca.sub.x)(Ba.sub.1-y Sr.sub.y).sub.2 Cu.sub.4 O.sub.8 and having a transition temperature of 77K or above, comprising the step of causing a reaction between (R.sub.1-x Ca.sub.x)(Ba.sub.1-y Sr.sub.y).sub.2 Cu.sub.3 O.sub.7-z and a Cu material such as CuO, wherein R stands for one or more rare earth elements selected from the group consisting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm and Yb, and wherein 0.01.ltoreq.x.ltoreq.0.25, 0.ltoreq.y.ltoreq.0.5, and 0.ltoreq.z.ltoreq.1. The advantage of this production method is that this production method does not require a hot static pressing process which takes a long time.

Abstract: Cement compositions which have improved properties such as increased stability, reduced settling tendencies, enhanced fluid loss properties and the like and methods of using such cement compositions are provided. The cement compositions are comprised of water, hydraulic cement and an aqueous colloidal silicic acid suspension wherein the colloidal silicic acid particles have a specific surface area in the range of from about 50 m.sup.2 /g to about 1000 m.sup.2 /g.

Abstract: The invention concerns new diorganotin compounds derived from N-cyclohexyl-N'-hydroxy diazenium oxide, as well as bactericides and fungicides which are suitable as disinfectants, as preservatives for wood and other materials, for bactericidal and fungicidal finishing of textiles, plastics, building materials or as biocides for paint systems and which contain these diorganotin compounds as active ingredients.

Abstract: The invention relates to a method for producing fine grained, sintering active nitride and/or carbonitride powder of titanium as well as, optionally, of other metals of the IVA, VA and VIA group of the periodic table of elements. In order to achieve, without any considerable comminution, a grain of high purity with a low grain size, the following steps are performed:The introduction into the reactor of a reaction mixture consisting of oxides of titanium and, optionally, of other metals of the IVA, VA and VIA group of the periodic system and a carbonaceous material;providing a nitrogen atmosphere in the reactor at a decreased pressure;heating the content of the reactor to a temperature of between 800.degree. C. and 2000.degree. C., preferably between 1000.degree. C. and 1900.degree. C., and keeping the temperature within a range of between 1400.degree. C. and 1800.degree. C.

Abstract: A self temperature limiting electrical conducting composite comprising a dispersion of an electrical conducting aggregate and an electrical insulating aggregate in a polymer. The electrical conducting aggregate is preferably a natural or synthetic graphite. The electrical insulating aggregate is preferably silica (SiO.sub.2) or calcite. The polymer is preferably an acrylate.

Abstract: An improved casting composition utilizes an aqueous finely dispersed silica binder to provide reduced drying times and reduced cracking and explosion of troughs, runners and other containment equipment designed for use by the iron and steel industry. The composition is prepared by mixing 8-14% by weight of the aqueous silica binder with 55-90% by weight of a refractory base material and up to 35% by weight of silicon carbide. Preferably, the composition will also include 5-10% by weight of calcined alumina, 1-10% by weight of microsilica, and 0.02-1% by weight of a setting agent. Troughs and runners manufactured from the composition also exhibit increased strength and improved resistance to oxidation, corrosion and erosion.

Abstract: Macro defect free cementitious products are obtained by curing or firing a cementitious composition comprising water, a reactive filler and a water soluble alkali metal silicate.The products show good strength and heat and water stability, by contrast with known mdf products where leaching out of the polymers used results in decreased strength.

Abstract: Correction stick comprising a gelatinizer, white pigments, dispersant, water-soluble or dispersible film-forming resin and a gelation modifier, said gelatinizer being alkali metal salts or ammonium salts of aliphatic carboxylic acids having carbon atoms of 8 to 36 and said gelation modifier being organic or inorganic salts which form univalent metallic positive ion in an aqueous solution such as sodium or potassium positive ion or sequestering agents or the mixture thereof with the organic or inorganic salts.

Abstract: A low brightness pigment and method is provided from a heretofore rejected waste kaolin stream. Kaolin processing rejects are high in iron-stained TiO.sub.2. After separating the stained TiO.sub.2 from the high brightness kaolin and concentrating the resulting fraction, the material can be processed to produce a low brightness pigment suitable of many applications where lower brightness is desirable, such as coating paper board without mottling.

Abstract: A surface treating tape has a sheet-like backing covered with closely spaced protuberances which are coated with an abrasive layer which contains premium abrasive particles. The surface finishing tape is useful for finishing magnetic disks and other substrates to provide a precision finish.

Abstract: An improved gunning composition for use in the steel industry includes between 60-75% by weight of a refractory base material, 10-20% by weight of silicon carbide, 7-15% by weight of ball clay, 4-8% by weight of a silica binder material, and, optionally, 5-10% by weight of a graphite material. The silica binder replaces binders composed of petroleum pitch or clay. The silica binder causes the composition to have (1) better adhesion, (2) less cracking, (3) improved strength, and (4) increased resistance to oxidation, corrosion and erosion.

Abstract: Disclosed is an ink composition which comprises an aqeuous liquid vehicle and particles of an average diameter of 100 nanometers or less which comprise micelles of block copolymers of the formula ABA, wherein A represents a hydrophilic segment and B represents a hydrophobic segment, and wherein dye molecules are covalently attached to the micelles, said dye molecules being detectable when exposed to radiation outside the visible wavelength range. Optionally, silica is precipitated within the micelles. In a specific embodiment, the dye molecules are substantially colorless. In another specific embodiment, the ink also contains a colorant detectable in the visible wavelength range.

Abstract: A process of electrolessly metallizing a body on the surface thereof with a metal coating incorporating particulate matter therein, which process comprises contacting the surface of said body with a stable electroless metallizing bath comprising a metal salt, an electroless reducing agent, a complexing agent, an electroless plating stabilizer, a quantity of particulate matter which is essentially insoluble or sparingly soluble in the metallizing bath, and a particulate matter stabilizer (PMS), and maintaining said particulate matter in suspension in said metallizing bath during the metallizing of said body for a time sufficient to produce a metallic coating with said particulate matter dispersed therein.

Abstract: A glass sealant comprises a mixture of about 70-90% of a solder glass powder of a low-melting lead-borate glass with a transformation temperature of 330.degree. C. or lower, 1-20% by weight of cordierite powder, and 1-25% by weight of mullite powder, with the combined content of cordierite and mullite powder being from about 10-30%. The lead-borate glass comprises from about 82-88% by weight of PbO, 12-17% by weight of B.sub.2 O.sub.3, 0-1% by weight of SiO.sub.2, and 0-1% by weight of Al.sub.2 O.sub.3. Both the cordierite and mullite powder are preferably synthetically produced to reduce the .alpha.-radiation. The synthetically produced cordierite powder preferably still contains up to about 9% by weight of a non-crystalline vitreous phase. The grain size of the powders is preferably under 100 microns. This glass sealant has well-balanced properties relative to thermal expansion, melting temperature, dielectric constant, loss angle, mechanical strength, thermal shock resistance, and chemical resistance.

Abstract: A ceramic composition of matter which is sinterable at low temperatures is composed ofa) 40 to 90% by weight of a finely disperse, high-melting oxidic material andb) 10 to 60% by weight of a finely disperse glass having a softening point of 500.degree. to 850.degree. C., a coefficient of thermal expansion (=CTE) of 2 to 5.times.10.sup.-6 K.sup.-1 (measured in the interval from 0.degree. to 400.degree. C.) and a dielectric constant of less than 5 (measured at 10.sup.6 Hz and 20.degree. C.). The finely disperse oxidic material is composed of a mixture of MgO, Al.sub.2 O.sub.3 and SiO.sub.2 in an Al.sub.2 O.sub.3 /MgO weight ratio of 1.8-4 with an SiO.sub.2 weight fraction of 42-65% by weight or an equivalent quantity of corresponding oxide precursors which, on heating, decompose to give these oxides. The MgO or the MgO precursor has a mean grain size of 0.05 to 3 .mu.m and the SiO.sub.2 or the SiO.sub.2 precursor has a mean grain size of 2 to 20 .mu.m. The composition sinters at 900.degree.-1100.degree. C.

Abstract: A solid oxide fuel cell includes a plurality of flat plate-like laminates spaced substantially in parallel with one another. One surface of each of the laminates is covered with a flat air electrode film, while the other surface is covered with a flat fuel electrode film. The fuel cell further includes a plurality of oxidizing gas flow passages each arranged between the adjacent laminates and facing the flat air electrode film, a plurality of fuel gas flow passages each arranged between the adjacent flat laminates and facing the flat fuel electrode films and at least air electrode films, solid electrolyte films and fuel electrode films interposed between the oxidizing and fuel gas flow passages. Oxidizing gas supply pipes are each extended from an opening at one end of each of the oxidizing gas flow passages into the gas flow passage, and closure members each close the other end of the oxidizing gas flow passage.