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公开(公告)号：US5242873A
公开(公告)日：1993-09-07
申请号：US182370
申请日：1988-04-18
IPC分类号： C04B35/486
CPC分类号： C04B35/486
摘要： An electrically conductive material for use in solid oxide fuel cells, electrochemical sensors for combustion exhaust, and various other applications possesses increased fracture toughness over available materials, while affording the same electrical conductivity. One embodiment of the sintered electrically conductive material consists essentially of cubic ZrO.sub.2 as a matrix and 6-19 wt. % monoclinic ZrO.sub.2 formed from particles having an average size equal to or greater than about 0.23 microns. Another embodiment of the electrically conductive material consists essentially at cubic ZrO.sub.2 as a matrix and 10-30 wt. % partially stabilized zirconia (PSZ) formed from particles having an average size of approximately 3 microns.
摘要翻译： 用于固体氧化物燃料电池的导电材料，用于燃烧排气的电化学传感器和各种其它应用在提供相同的导电性的同时具有比现有材料更高的断裂韧性。 烧结导电材料的一个实施方案基本上由立方ZrO 2作为基体和6-19wt。 ％的单斜晶ZrO2由平均尺寸等于或大于约0.23微米的颗粒形成。 导电材料的另一个实施方案基本上以立方ZrO 2为基质，10-30重量％ ％部分稳定的氧化锆（PSZ）由平均尺寸约3微米的颗粒形成。
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2.发明授权Method of producing improved microstructure and properties for ceramic superconductors 失效陶瓷超导体的改进微结构和性能的制备方法
公开(公告)号：US5525586A
公开(公告)日：1996-06-11
申请号：US306927
申请日：1994-09-15
CPC分类号： H01L39/2419
摘要： A ceramic superconductor is produced by close control of oxygen partial pressure during sintering of the material. The resulting microstructure of YBa.sub.2 Cu.sub.3 O.sub.x indicates that sintering kinetics are enhanced at reduced p(O.sub.2). The density of specimens sintered at 910.degree. C. increased from 79 to 94% theoretical when p(O.sub.2) was decreased from 0.1 to 0.0001 MPa. The increase in density with decrease in p(O.sub.2) derives from enhanced sintering kinetics, due to increased defect concentration and decreased activation energy of the rate-controlling species undergoing diffusion. Sintering at 910.degree. C. resulted in a fine-grain microstructure, with an average grain size of approximately 4 .mu.m. Such a microstructure results in reduced microcracking, strengths as high as 191 MPa and high critical current density capacity.
摘要翻译： 陶瓷超导体是通过在材料烧结过程中紧密控制氧分压而产生的。 所得到的YBa2Cu3Ox微观结构表明烧结动力学在降低的p（O 2）下得到增强。 当p（O2）从0.1降低到0.0001 MPa时，在910℃下烧结的样品的密度从理论上从79增加到94％。 由于增加的缺陷浓度和速率控制物质经历扩散的活化能降低，p（O 2）的密度增加来自增强的烧结动力学。 在910℃下烧结导致细晶粒微观结构，平均晶粒尺寸约为4μm。 这种微观结构导致微裂纹减少，强度高达191MPa和高临界电流密度容量。
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3.发明授权High temperature refractory of MgCr.sub.2 O.sub.4 matrix and unstabilized ZrO.sub.2 particles 失效MgCr2O4基体的高温耐火材料和不稳定的ZrO2颗粒
公开(公告)号：US4647547A
公开(公告)日：1987-03-03
申请号：US807097
申请日：1985-12-10
IPC分类号： C04B35/043 , C04B35/047 , C04B35/42 , C04B35/04
CPC分类号： C04B35/0435 , C04B35/0476 , C04B35/42
摘要： A high chromia refractory composite has been developed with improved thermal shock resistance and containing about 5-30 wt. % of unstabilized ZrO.sub.2 having a temperature-dependent phase change resulting in large expansion mismatch between the ZrO.sub.2 and the chromia matrix which causes microcracks to form during cooling in the high chromia matrix. The particle size preferably is primarily between about 0.6-5 microns and particularly below about 3 microns with an average size in the order of 1.2-1.8 microns.
摘要翻译： 已经开发了高耐火耐火复合材料，具有改善的耐热冲击性，并含有约5-30wt。 ％的不稳定的ZrO 2具有温度依赖性相变，导致ZrO 2和氧化铬基体之间的大的膨胀失配，这导致在高铬酸性基质中的冷却期间形成微裂纹。 粒度优选主要在约0.6-5微米之间，特别是低于约3微米，平均尺寸约为1.2-1.8微米。
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