摘要:
Disclosed is a method of making a pyrochlore comprising, obtaining a solution comprising a solvent and a metal precursor or salt thereof capable of forming a pyrochlore, wherein the metal precursor or salt thereof is dissolved in the solvent, subjecting the solution to a drying step to obtain a non-gelled or non-polymerized pyrochlore precursor material in powdered form, and subjecting the pyrochlore precursor material to a calcination step to obtain a pyrochlore.
摘要:
Provided is a catalyst for purifying an exhaust gas, the catalyst excelling in catalytic performance and oxygen storage capacity (OSC). The catalyst for purifying an exhaust gas of the present invention is a catalyst for purifying an exhaust gas which comprises a ceria-zirconia composite oxide (A) having a pyrochlore structure and a ceria-zirconia composite oxide (B) having a cubic crystal structure, wherein at least a part of the ceria-zirconia composite oxide (A) is composited with the ceria-zirconia composite oxide (B).
摘要:
A composite positive active material including a composite represented by Formula 1:
Formula 1 δLi 2 MO 3 ·(1-δ)[xLi 2 MnO 3 ·(1-x)Li d Ni a Co b M' c O 2 ]
wherein, in Formula 1, M is titanium (Ti) or zirconium (Zr); M' is manganese (Mn), vanadium (V), magnesium (Mg), gallium (Ga), silicon (Si), tungsten (W), molybdenum (Mo), iron (Fe), chromium (Cr), copper (Cu), zinc (Zn), titanium (Ti), aluminum (Al), boron (B), or a combination thereof; and 0
摘要:
A subject of the invention relates to providing a powder for a translucent zirconia sintered body which is necessary for the production of a zirconia sintered body having a high sintered-body density and high strength and giving an excellent sense of translucency, without conducting any special sintering, such as HIP sintering. The invention relates to a technique for obtaining, through normal-pressure sintering, a translucent zirconia sintered body characterized by comprising zirconia which contains 2-4 mol% yttria as a stabilizer and has an alumina content of 0.2 wt% or lower, and by having a relative density of 99.8% or higher and a total light transmittance, as measured at a thickness of 1.0 mm, of 35% or higher. It is preferred that a powder containing 0-0.2 wt% alumina with a particle diameter of 0.01-0.5 µm, having a BET specific surface area of 5-16 m 2 /g and an average particle diameter of 0.3-0.7 µm, and having a rate of sintering shrinkage in normal-pressure sintering (Δρ/ΔT; g/cm 3 ·°C) of 0.0125 or higher but 0.0160 or lower should be subjected to normal-pressure sintering in the atmosphere.
摘要翻译:本发明的课题在于提供一种半导体氧化锆烧结体用粉末,该粉末用于制造烧结体密度高,强度高,氧化锆烧结体具有良好的透光性的氧化锆烧结体而不需要进行特别的烧结 如HIP烧结。 本发明涉及一种通过常压烧结获得透光性氧化锆烧结体的技术,其特征在于,包含含有2〜4摩尔%氧化钇作为稳定剂且氧化铝含量为0.2重量%以下的氧化锆, 在1.0mm的厚度下测得的相对密度为99.8%或更高,总透光率为35%或更高。 优选含有0-0.2重量%的粒径为0.01-0.5μm的氧化铝的粉末,其BET比表面积为5-16平方米/克,平均粒径为0.3-0.7微米,并且具有 常压烧结中的烧结收缩率(Δρ/ΔT; g / cm 3·℃)为0.0125以上且0.0160以下时,应在大气中进行常压烧结。
摘要:
The present invention provides a production method that can produce a garnet-type compound containing zirconium and lithium, the compound being in the form of fine particles, with high productivity. The method produces a garnet-type compound containing Zr, Li, and element M 1 (wherein M 1 is at least one element selected from the group consisting of La, Sc, Y, and Ce) as constituent elements. The method includes a first step of (1) mixing a first raw material and a second raw material to obtain a precipitate, the first raw material being a solution containing a zirconium carbonate complex and having a pH of at least 7.0 and not more than 9.5, and the second raw material containing a compound containing the above element M 1 as a constituent element; and (2) a second step of mixing the precipitate and a third raw material containing Li as a constituent element to obtain a mixture, and then firing the mixture at a temperature of less than 1,000°C to obtain a fired product. The first raw material is prepared by mixing, at a prescribed molar ratio, at least a compound that contains a carbonate species and a compound that contains a zirconium species.
摘要翻译:本发明提供的制造方法做了能产生含锆和锂化合物以细颗粒的形式石榴石型化合物,具有高的生产率。 该方法产生含有的Zr,栗石榴石型化合物,和元素M 1(worin M 1为选自由La,SC,Y中选出的至少一种元素,和Ce)作为构成元素。 该方法包括:(1)将第一原料和第二原料以获得沉淀物的第一步骤中,将第一原料是含有碳酸锆络合物和具有pH值至少为7.0且不大于9.5的溶液中 和所述第二原料包含含有上述元素M 1作为构成元素的化合物; 和(2)在低于1000℃的温度下混合的沉淀物和第三原料的含Li作为构成元素以获得混合物,然后煅烧该混合物的第二步骤,以得到烧结物。 第一原料是通过混合制备,以规定的摩尔比,至少一个化合物确实含有碳酸盐物质和化合物并含有锆物种。
摘要:
L'invention concerne une composition à base d'oxydes de zirconium et de cérium dans un rapport atomique Zr/Ce > 1, et comprenant en outre de l'oxyde de lanthane et un oxyde d'une terre rare autre que le cérium et le lanthane, caractérisée en ce qu'après calcination 6 heures à 1150°C elle possède une surface spécifique d'au moins 10m 2 /g. La composition est obtenue en formant un mélange comprenant un sol d'un composé de zirconium et des composés de cérium, de lanthane et de ladite terre rare, en mettant en présence ce mélange et une solution d'un composé basique, en effectuant un chauffage et en calcinant le précipité ainsi obtenu. La composition peut être utilisée comme catalyseur.
摘要:
The present invention provides a proton-conducting oxide comprising a perovskite crystal structure represented by a composition formula A a B 1-x B' x O 3-δ . A represents strontium. B represents zirconium. B' represents at least one selected from the group consisting of yttrium and ytterbium. The value of a is more than 0.84 and less than 1.0. The value of x is more than 0.0 and less than 0.2. The present invention provides a proton-conducting oxide having a capability to maintain high proton conductivity even if the proton-conducting oxide is exposed to the air atmosphere for a long time.
摘要翻译:本发明提供一种包含由组成式A a B 1-x B'x O 3-'表示的钙钛矿晶体结构的质子传导性氧化物。 A代表锶。 B代表锆。 B'表示选自由钇和镱组成的组中的至少一种。 a的值大于0.84且小于1.0。 x的值大于0.0且小于0.2。 本发明提供即使将质子传导性氧化物长时间暴露于大气中也具有保持高质子传导能力的质子传导性氧化物。