摘要:
Mercury metal-halide HID lamp having a discharge-sustaining filling comprising sodium halide and scandium halide is improved by providing a thin transparent layer comprising boron oxide adhered to and reacted with the exterior surface portion of the vitreous silica arc tube. Such a coating substantially inhibits migration of sodium ions through the arc tube. The coating also imparts devitrification resistance to any vibreous silica surface to which it is applied. The layer comprising boron oxide preferably is applied to the vitreous silica substrate by forming a clear, partially hydrolyzed solution principally comprising boron alkoxide and silicon alkoxide which is applied to the vitreous silica substrate. The substrate and applied solution are then heated to react the glass-forming constituents of the applied solution with the arc tube.
摘要:
A liquid polymer is formed in a low temperature polymerization reaction involving organo-metallic sodium and aluminum compounds, at least one of which is partially hydrolyzed. The polymer is hydrolyzed, dried to form an amorphous sodium Beta-alumina precursor, and then heated, at between 1,200.degree. C. and about 1,550.degree. C., to form a ceramic, comprising ion-conductive sodium Beta-alumina which is useful as a solid electrolyte.
摘要:
A composite material having a fiber system embedded in a host matrix material. The fiber system has a protective reaction barrier around the embedded fibers to prevent deleterious chemical or mechanical reaction between the fiber and matrix. The fiber coating is applied by immersion of the fiber system into an alkoxide solution of the desired oxide precursor with controlled immersion and withdrawal rates with subsequent drying, heating to convert to a pure oxide state, and where required, post processing, to convert the oxide coating to a carbide or nitride, for example.
摘要:
The absorption of neutrons of a nuclear reactor without producing fissions is reduced by providing selected isotopes of zirconium for fabrication of parts such as cladding, thimble tubes and grids. Specifically, the zirconium is enriched in .sup.90 Zr or is depleted in .sup.91 Zr. The selected isotopes are produced by irradiating Zr(OC.sub.4 H.sub.9).sub.4.sup.t, Zr(OC.sub.5 H.sub.11).sub.4.sup.t and/or Zr(OC.sub.3 H.sub.7).sub.4.sup.t, with radiation from a CO.sub.2 laser tuned to the vibrations of the CO(.sup.90 Zr) bond or the O(.sup.91 Zr) bond.
摘要:
Antireflective silica coating for vitreous material is substantially non-reflecting over a wide band of radiations. This is achieved by providing the coating with a graded degree of porosity which grades the index of refraction between that of air and the vitreous material of the substrate. To prepare the coating, there is first prepared a silicon-alkoxide-based coating solution of particular polymer structure produced by a controlled proportion of water to alkoxide and a controlled concentration of alkoxide to solution, along with a small amount of catalyst. The primary solvent is alcohol and the solution is polymerized and hydrolized under controlled conditions prior to use. The prepared solution is applied as a film to the vitreous substrate and rapidly dried. It is thereafter heated under controlled conditions to volatilize the hydroxyl radicals and organics therefrom and then to produce a suitable pore morphology in the residual porous silica layer. The silica layer is then etched in order to enlarge the pores in a graded fashion, with the largest of the pores remaining being sufficiently small that radiations to be passed through the substrate are not significantly scattered. For use with quartz substrates, extremely durable coatings which display only 0.1% reflectivity have been prepared.
摘要:
Disclosed is a nasicon compound and a method of making it. The nasicon compound is rhombohedral at room temperature and has the general formulaM.sub.1+x+O.02y+0.04z M'.sub.2-0.02(y+z) M".sub.0.02y M"'.sub.0.02z M"".sub.x M""'.sub.3-x O.sub.12where M is selected from lithium, sodium, calcium, and silver, M' is selected from zirconium, titanium or hafnium, M" is selected from yttrium, scandium or lanthanum, M"' is selected from magnesium, calcium, strontium or barium, M"" is selected from silicon and germanium, M""' is selected from phosphorous and arsenic, x is about 1.6 to about 2.2, y is about 0 to about 15, and z is about 0 to about 15. The preferred compound isNa.sub.1+x Zr.sub.2 Si.sub.x P.sub.3-x O.sub.12.A sodium sulfur battery using the nasicon compound is also disclosed.
摘要翻译:公开了一种鼻子化合物及其制备方法。 鼻腔化合物在室温下为菱面体,具有通式M1 + x + O.02y + 0.04zM'2-0.02(y + z)M'0.02yM“'0.02zM”“xM” “3-xO 12其中M选自锂,钠,钙和银,M'选自锆,钛或铪,M”选自钇,钪或镧,M“选自镁 ,钙,锶或钡,M“选自硅和锗,M”选自磷和砷,x为约1.6至约2.2,y为约0至约15,z为 为约0至约15.优选的化合物为Na + 1Z x Zr 2 S x P 3-x O 12。 还公开了使用纳西奇化合物的钠硫电池。
摘要:
The invention comprises a method for coupling an optical fiber to an optical device. Ends of optical fibers are ion polished. Micro-manipulators are used to position the polished end in abutting relationship with the optical device. A liquid which contains glass constituents is used to coat the junction of the optical fiber and the optical device. The liquid is subjected to a temperature cycle which fuses the glass constituents to the optical fiber and to the optical device.
摘要:
A clear solution is prepared by reacting metal alkoxide with a mixture of critical amounts of water and/or acid in an alcohol diluted medium. Alkoxides may be Ti(OR).sub.4 or Ta(OR).sub.5, or another metal alkoxide such as Si(OR).sub.4 in admixture with these alkoxides. Acids may be HCl or HNO.sub.3. Quarter wave inorganic optical coatings are deposited by applying the alkoxide solution to a substrate then heating the coating at over 350.degree. C. The coatings reduce reflectivity on silicon solar cells. The index of refraction of the coating can be varied by several techniques, including altering the proportion of titanium and silicon in the coating firing temperature, firing atmosphere. Thicknesses of the coating can be controlled by varying the rpm in spin application, withdrawal rate in dipping application, by concentration of the solution, by the type of solvent or the degree of polymerization of the titanium complexes.
摘要:
A clear solution is prepared by reacting metal alkoxide with a mixture of critical amounts of water and/or acid in an alcohol diluted medium. Alkoxides may be Ti(OR).sub.4 or Ta(OR).sub.5, or another metal alkoxide such as Si(OR).sub.4 in admixture with these alkoxides. Acids may be HCl or HNO.sub.3. Quarter wave inorganic optical coatings are deposited by applying the alkoxide solution to a substrate then heating the coating at over 350.degree. C. The coatings reduce reflectivity on silicon solar cells. The index of refraction of the coating can be varied by several techniques, including altering the proportion of titanium and silicon in the coating firing temperature, firing atmosphere. Thicknesses of the coating can be controlled by varying the rpm in spin application, withdrawal rate in dipping application, by concentration of the solution, by the type of solvent or the degree of polymerization of the titanium complexes.
摘要:
Energy-conserving incandescent lamp wherein the envelope has provided on the interior surface thereof a very efficient and economically applied heat mirror which is highly transmissive for visible radiations and highly reflective for infrared radiations, thereby to enhance the conversion of electric energy to visible energy. The heat-mirror coating comprises a two layer Ag/TiO.sub.2 or a three layer TiO.sub.2 /Ag/TiO.sub.2 coating of predetermined thickness. The three layer coating is formed by first applying to the envelope interior surface a thin layer of clear aliphatic alcohol solution having contained therein partially hydrolyzed metallic alkoxide which substantially comprises titanium alkoxide, and which solution contains at most only a limited amount of selected mineral acid. The applied clear solution layer is heat treated to convert same to a thin continuous layer substantially comprising titania. A thin silver layer is applied over the first applied titania coating, preferably by vacuum metallizing, and a second thin layer of solution containing the partially hydrolyzed metallic alkoxide which substantially comprises titanium alkoxide is applied over the silver layer. Thereafter the applied second layer is heat treated to convert same to titania, with the heat treating temperatures and atmospheres controlled so as not to affect the applied silver layer. The two layer coating is applied by omitting the first TiO.sub.2 coating step.
摘要翻译:节能白炽灯,其中外壳在其内表面上设置了一种非常有效且经济上应用的热反射镜,其对于可见光辐射是高度透射的并且对于红外辐射具有高反射性,从而增强电能转换成可见光能量。 热镜涂层包括预定厚度的两层Ag / TiO 2或三层TiO 2 / Ag / TiO 2涂层。 通过首先向包封内表面施加薄层的透明脂族醇溶液,其中含有基本上包含钛醇盐的部分水解的金属醇盐,并且该溶液至多仅含有限量的选择的无机酸形成三层涂层。 将所施加的透明溶液层进行热处理以将其转化为基本上包含二氧化钛的薄连续层。 优选通过真空金属化将薄银层涂覆在第一涂覆的二氧化钛涂层上,并且将含有基本上包含钛醇盐的部分水解的金属醇盐的第二薄层溶液涂覆在银层上。 此后,将所施加的第二层热处理以将其转化为二氧化钛,其中热处理温度和气氛被控制为不影响施加的银层。 通过省略第一TiO 2涂覆步骤来施加双层涂层。