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    • 58. 发明公开
    • 반도체 자기 조성물과 그 제조 방법
    • 半导体陶瓷组合物及其制造方法
    • KR1020090082198A
    • 2009-07-29
    • KR1020097008638
    • 2007-10-26
    • 히다찌긴조꾸가부시끼가이사
    • 시마다,타케시토지,카즈야
    • C04B35/46H01C7/02
    • H01C7/025C04B35/4682C04B35/62675C04B35/62685C04B2235/3201C04B2235/3208C04B2235/3234C04B2235/3251C04B2235/3294C04B2235/3298C04B2235/3418C04B2235/5436C04B2235/6562C04B2235/6565C04B2235/6584H01C17/06533
    • This invention provides a semiconductor ceramic composition comprising BaTiO3, in which a part of Ba has been replaced with Bi-Na, which semiconductor ceramic composition can suppress the vaporization of Bi in a calcination process, can prevent a deviation of composition of Bi-Na to suppress the formation of a dissimilar phase, can realize a further reduction in electrical resistivity at room temperature, and can suppress a variation in Curie temperature, and a process for producing the same. Calcined powder of Ba(TiM)O3, wherein M represents an element which has been converted to a semiconductor, and calcined powder of (BiNa)TiO3 are provided separately from each other. The calcined powder of Ba(TiM)O3 is calcined at an optimal temperature which is a relatively high temperature. On the other hand, the calcined powder of (BiNa)TiO3 is calcined at an optimal temperature which is a relatively low temperature. According to the above constitution, the vaporization of Bi can be suppressed, and a deviation of composition of Bi-Na can be prevented to suppress the formation of a dissimilar phase. A semiconductor ceramic composition, which has low resistivity at room temperature and can suppress a variation in Curie temperature, can be produced by mixing these calcined powders together, molding the mixture, and sintering the molded product.
    • 本发明提供一种包含BaTiO3的半导体陶瓷组合物,其中Ba的一部分已被Bi-Na替代,该半导体陶瓷组合物可以在煅烧过程中抑制Bi的蒸发,可以防止Bi-Na的组成偏差 抑制异相的形成,可以实现室温下电阻率的进一步降低,并且可以抑制居里温度的变化及其制造方法。 Ba(TiM)O 3的煅烧粉末,其中M表示已经转化为半导体的元素,(BiNa)TiO 3的煅烧粉末彼此分开设置。 Ba(TiM)O 3的煅烧粉末在相对较高温度的最佳温度下煅烧。 另一方面,(BiNa)TiO 3的煅烧粉末在相对较低温度的最佳温度下煅烧。 根据上述结构,可以抑制Bi的汽化,可以防止Bi-Na的组成偏差,抑制异相的形成。 通过将这些煅烧粉末混合在一起,将混合物成型并烧结成型制品,可以制得室温下电阻率低且可以抑制居里温度变化的半导体陶瓷组合物。