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公开(公告)号:US3969123A
公开(公告)日:1976-07-13
申请号:US548940
申请日:1975-02-11
CPC分类号: C04B35/495 , C01G41/00
摘要: This invention relates to ceramic compositions of tungsten and tantalum oxides including 0 to 33 1/3 mole percent of a metal oxide such as hafnia. These ceramics are characterized by melting points greater than about 1400.degree.C and selectively controlled coefficients of thermal expansion of essentially zero to a negative value in the temperature range of 20.degree. to 1000.degree.C.
摘要翻译: 本发明涉及钨和钽氧化物的陶瓷组合物,包括0至33 1/3摩尔%的金属氧化物如哈夫尼亚。 这些陶瓷的特征在于大于约1400℃的熔点,并且在20℃至1000℃的温度范围内选择性地控制的热膨胀系数基本为零至负值。