Abstract: A composition which comprises a solvent extract of peat or a pyrolysis product of peat or a montan wax and petroleum bitumen of the paving grade type.

Abstract: A method for forming extremely homogeneous metal and ceramic composites wherein a dispersion of metal and/or ceramic powders in a polymer solution, such as a solution of an organic binder, is precipitated by the addition of a second, miscible solvent in which the polymer is insoluble. The resulting precipitated second phase is compacted, dried and processed to form an extremely uniform composite with excellent physical properties. The method has advantages over other processes since it is relatively flexible and inexpensive yet yields a high quality product.

Abstract: A transparent and fast curing composition suitable for use as a shatter-resistant coating on a glass, porcelain, or ceramic surface, wherein the composition comprises:(A). at least about 62 to about 71 parts by weight of a solid, benzene soluble resin copolymer consisting essentially of R.sub.3 SiO.sub.1/2 units and SiO.sub.4/2 units,(B). from about 29 to about 38 parts by weight of an essentially cyclic free, polydiorganosiloxane, the viscosity of the polydiorganosiloxane having a value of from about 500 to about 1,000,000 centipoises at 25.degree. C., the total of (A) and (B) being 100 parts by weight;(C). an organopolysiloxane having silicon bonded hydrogen atoms,(D). a platinum containing catalyst in sufficient quantity to provide at least 0.1 part by weight of platinum for every one million parts by weight of the combined weight of (a), (b), and (c).The composition forms a coating which is transparent, fast curing, and stable at elevated temperatures.

Abstract: A silicon nitride sintered body comprised of 1.5 to 3.0% by weight of Y.sub.2 O.sub.3, 0.1 to 1.0% by weight of Al.sub.2 O.sub.3 and 96 to 98.4% by weight of Si.sub.3 N.sub.4 wherein the Y.sub.2 O.sub.3 /Al.sub.2 O.sub.3 weight ratio is at least 2.5, and having a density of at least 3.0 g/cm.sup.3, exhibits a high oxidation resistance and a high strength at a high temperature. This silicon nitride sintered body is prepared by sintering a powdery mixture consisting essentially of 1.5 to 3.0% by weight of Y.sub.2 O.sub.3 powder, 0.1 to 1.0% by weight of Al.sub.2 O.sub.3 powder, and 96 to 98.4% by weight of Si.sub.3 N.sub.4 powder, the Y.sub.2 O.sub.3 /Al.sub.2 O.sub.3 weight ratio being at least 2.5, the oxygen content in the Si.sub.3 N.sub.4 powder being less than 2.0% by weight and the total metallic impurity content in the Si.sub.3 N.sub.4 being less than 200 ppm, at a temperature of 1,850.degree. to 2,000.degree. C. in a non-oxidizing atmosphere.

Abstract: Boron/nitrogen preceramic polymers are prepared by reacting (a) the product of mass thermolysis of a compound of Formula (1): ##STR1## in which A is a halogen atom and R is a hydrogen atom, a hydrocarbon radical, or an organosilyl or hydrogenoorganosilyl radical, with (b) an amino compound containing at least one --NH.sub.2 group; the resulting polymers are facilely pyrolyzed into boron nitride ceramic materials.

Abstract: A glass composition consisting essentially of the following components present in the glass in the following mole percent ranges is shown:CHART I ______________________________________ CHEMICAL COMPOSITION RANGES mole percent ______________________________________ SiO.sub.2 58-68 Al.sub.2 O.sub.3 0-2 K.sub.2 O + Rb.sub.2 O + Cs.sub.2 O 0-3 PbO 10-15 Bi.sub.2 O.sub.3 0.3-2.1 MgO + CaO + BaO 10-20.4 B.sub.2 O.sub.3 0-4 As.sub.2 O.sub.3 + Sb.sub.2 O 0.1-1.1 ______________________________________A glass composition for manufacturing a high performance microchannel plate is also shown. A microchannel plate made from a glass composition consisting essentially of components in the glass range as defined above is also shown. A method for making a non-porous glass tubing comprising a hollowed out central area and having a transformation temperature in range of about 570.degree. C. to about 610.degree. C., a liquidus temperature below 1000.degree. C.

Abstract: An improved dry ground calcium carbonate filler is provided which is less sensitive to variations in relative humidity and does not promote premature viscosity increase in polyester molding compound. This filler is dry ground from a Caribbean micritic limestone to produce Class I and Class II fillers which are acceptable for use in polyester molding compound applications. A polyester molding compound containing this dry ground filler produces a composite having superior izod impact resistance and surface quality. In some situations filler loading levels may be increased 10-15% in the SMC/BMC without detrimental effects on the final composite.

Abstract: Polycrystalline ceramic bodies having uniform transparent optical characteristics are produced by providing a green compact, presintering that compact at a temperature in the range from about 1,350.degree. C. to about 1,650.degree. C. until the closed porosity stage is reached, hot isostatic pressing the presintered compact to collapse substantially all pores disposed at grain boundaries and resintering the hot isostatically pressed compact at a temperature in the range from 1,700.degree. C.-1,950.degree. C. to cause grain growth under conditions in which pores, within those grains which are consumed by the growth of other grains, collapse as the grain boundary of the growing grain passes through the location of the pore in the smaller grain being consumed.

Abstract: A material for treating heavy metals and metal ions. The material contains as its main components quicklime and cement, and also contains, with respect to the quicklime and the cement, 0.05 to 0.35% by weight of potassium chloride, 0.03 to 0.20% by weight of magnesium chloride, 0.03 to 0.20% by weight of sodium chloride, 0.03 to 0.25% by weight of calcium chloride, 0.00002 to 0.01% by weight of cobalt chloride, 0.00002 to 0.01% by weight of citric acid, and 0.001 to 0.02% by weight of sodium sulfate. Harmful heavy metals and metal ions contained in effluents, slurries and sludges can be securely and inexpensively confined in a state in which they are prevented from elution. A coating of a fatty acid may be formed on the surface of the quicklime.

Abstract: A pyrolytic boron nitride with a highly oriented crystalline morphology of twinned boron nitride crystallites is produced by addition of a trace amount of zirconium into the boron nitride.

Abstract: This invention relates to materials produced by diluting in a solvent a preceramic mixture of a partially hydrolyzed silicate ester and a metal oxide precursor selected from the group consisting of an aluminum alkoxide, a titanium alkoxide, and a zirconium alkoxide. The preceramic mixture solvent solution is applied to a substrate and ceramified by heating. One or more ceramic coatings containing silicon carbon, silicon nitrogen, or silicon carbon nitrogen can be applied over the ceramified SiO.sub.2 /metal oxide coating. A CVD or PECVD top coating can be applied for further protection. The invention is particularly useful for coating electronic devices.

Abstract: This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C.sub.4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinkder during finish milling.

Abstract: A dispersion consisting essentially of magnetic particles, a dialkylester of phthalic acid which functions as a dispersing medium, and optionally, a dispersing agent is particularly useful as a precursor to a composition suitable for casting onto a cellulose acid ester support film to form a transparent magnetic recording layer for use in photographic films. The dispersion provides magnetic recording layers exhibiting fewer particle agglomerations and reduced light scattering and photographic prints prepared from films containing such magnetic layers exhibit virtually no increase in graininess attributable to the magnetic recording layer.

Abstract: A method of preparing an organosilazane including reacting a first halosilane having the formula RR.sup.1 SiX.sub.2, wherein X is F, Cl, Br, or I, and each R and R.sup.1, independently, is X, H, or a lower alkyl group; a first primary amine compound having the formula R.sup.2 NH.sub.2, wherein R.sup.2 is H or a lower alkyl group; and a second primary amine compound having the formula R.sup.3 NH.sub.2, wherein R.sup.3 is H or a lower alkyl group, R.sup.3 being different from R.sup.2, to form the organosilazane.

Abstract: A refractory brick for use in rotary cement kilns has improved properties by the addition of small quantities of MnO.sub.2 to the composition used to form the brick.

Abstract: A process is disclosed for manufacturing water reducing plasticizing and hardening-retarding plasticizing additives for concrete, using sugarcane derivatives that modify the structural characterisitics of the concrete, resulting in improved plasticity and density and altering of the curing time.

Abstract: A cementing composition for forming a low density cement slurry comprising a hydraulic cement and shot coke.

Abstract: This invention relates to a new ceramic-metal composite body and a method for producing the same. Particularly, a compliant layer composition is utilized for preventing the rupture of a ceramic article and/or the yielding or failure of a metal during the pouring, solidification and cooling of a molten metal which has been cast around the ceramic. A slurry composition for the compliant layer includes plaster of paris, a liquid vehicle and a filler material. The slurry composition is coated on the ceramic article and thereafter is heat-treated to form a compliant layer. Ceramic-metal composite bodies comprising low strength hollow articles and high expansion coefficient metals may be manufactured according to the method of this invention.

Abstract: A gunnable plastic refractory is made by adding a hydrocolloid, for example a polysaccharide ether such as methylcellulose, to the refractory composition and adjusting the moisture content to be from about 4% to about 10%. The workability index of the refractory mix is from about 8% to about 30%. The refractory can be gunned without stoppages caused by clogging of hoses and the rebound rate is low.

Abstract: The present invention relates to a ferroelectric ceramic material which is a Perovskite solid solution comprising a solid solution represented by the formula:Pb.sub.1-a M.sub.a (Mg.sub.1/3 p0 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3containing in the solution at least one oxide selected from the group A noted below and at least one oxide selected from the group B noted below.Group A : La.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 ;Group B : ZnO, SnO.sub.2 and Ta.sub.2 O.sub.5.The proposed ferroelectric ceramic material has a large piezoelectric strain constant d. The present invention is further directed to ferroelectric ceramic which is a Perovskite solid solution comprising a solid solution represented by the formula:Pb.sub.1 -aM.sub.a (Mg.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3wherein M is Ba or Sr, x+y+z is 1, a is from 0 to 0.10, x is from 0.05 to 0.70, y is from 0.25 to 0.50 and z is from 0.05 to 0.