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    • 13. 发明申请
    • SEMICONDUCTOR CERAMIC COMPOSITION AND PROCESS FOR PRODUCING THE SAME
    • 半导体陶瓷组合物及其制造方法
    • US20100012905A1
    • 2010-01-21
    • US12444895
    • 2007-10-26
    • Takeshi ShimadaKazuya Toji
    • Takeshi ShimadaKazuya Toji
    • H01B1/08
    • H01C7/025C04B35/4682C04B35/62675C04B35/62685C04B2235/3201C04B2235/3208C04B2235/3234C04B2235/3251C04B2235/3294C04B2235/3298C04B2235/3418C04B2235/5436C04B2235/6562C04B2235/6565C04B2235/6584H01C17/06533
    • It is intended to provide a semiconductor ceramic composition in which a part of Ba in BaTiO3 is substituted with Bi—Na, which is capable of restraining the evaporation of Bi in the calcination step, is capable of restraining the compositional deviation of Bi—Na thereby suppressing the formation of different phases, is capable of further reducing the resistivity at room temperature, and is capable of restraining the fluctuation of the Curie temperature; and to provide a production process of the same. When a calcined Ba(TiM)O3 powder (M is a semiconductor dopant) and a calcined (BaNa)TiO3 powder are separately prepared and the Ba(TiM)O3 powder is calcined at a relatively high temperature while the (BaNa)TiO3 powder is at a relatively low temperature, both at the most suitable temperatures for them, then the evaporation of Bi may be retarded and the compositional deviation of Bi—Na may be thereby suppressed to inhibit the formation of different phases; and when these calcined powders are mixed, formed and sintered, then a semiconductor ceramic composition which has a low resistivity at room temperature and is capable of restraining the fluctuation of the Curie temperature can be obtained.
    • 旨在提供一种半导体陶瓷组合物,其中BaTiO 3中的Ba的一部分被Bi-Na代替,Bi-Na能够抑制在煅烧步骤中Bi的蒸发,因此能够抑制Bi-Na的组成偏差 抑制不同相的形成,能够进一步降低室温下的电阻率,并且能够抑制居里温度的波动; 并提供相同的生产工艺。 当分别制备煅烧的Ba(TiM)O 3粉末(M为半导体掺杂剂)和煅烧(BaNa)TiO 3粉末时,并且在较高温度下煅烧Ba(TiM)O 3粉末,而(BaNa)TiO 3粉末为 在相对较低的温度下,在它们最适合的温度下,则Bi的蒸发可能被延迟,并且可以抑制Bi-Na的组成偏差以抑制不同相的形成; 并且当将这些煅烧粉末混合,形成和烧结时,​​可以获得在室温下具有低电阻率并且能够抑制居里温度波动的半导体陶瓷组合物。