公开(公告)号：US06218928B1

公开(公告)日：2001-04-17

申请号：US09068337

申请日：1998-05-08

申请人： Masuo Okada ,  Takahiro Sawaguchi ,  Masatada Yodogawa ,  Dai Matsuoka

发明人： Masuo Okada ,  Takahiro Sawaguchi ,  Masatada Yodogawa ,  Dai Matsuoka

IPC分类号： H01C710

CPC分类号： C04B35/475 ,  C01G29/00 ,  C01G29/006 ,  C01P2002/54 ,  C01P2006/40 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3251 ,  C04B2235/3294 ,  C22C29/04 ,  C22C29/12 ,  C22C29/16 ,  H01C7/022 ,  H01C7/023 ,  H01C17/06553

摘要： The PTC thermistor material of the invention comprises a matrix phase and electrically conductive phases substantially uniformly dispersed in the matrix phase, said conductive phases having a resistivity lower than that of the matrix phase, and has a resistivity changing sharply in the vicinity of the melting point of the conductive phases. The matrix phase is made up of any one of a polycrystalline ceramic material, a glass-polycrystalline ceramic composite material, a glass, a crystallized glass, and a polymer material, and the conductive phases are made up of a metal containing bismuth as a main component. It is thus possible to achieve a PTC thermistor material which can be controlled in terms of various properties such as the temperature at which PTCR property becomes available and the rate of resistivity change and so can be applied to circuit parts through which large currents pass in a normal operation state. Further, the PTC thermistor material can be easily manufactured with the stable PTCR property maintained. Furthermore, the PTC thermistor material can be operated with an increased rated current albeit being of small size, and has a high degree of shape freedom.

摘要翻译： 本发明的PTC热敏电阻材料包括基体相和基本均匀分散在基体相中的导电相，所述导电相的电阻率低于基体相的电阻率，并且在熔点附近具有电阻率的急剧变化 的导电相。 基体相由多晶陶瓷材料，玻璃 - 多晶陶瓷复合材料，玻璃，结晶玻璃和聚合物材料中的任何一种构成，并且导电相由含有铋作为主体的金属构成 零件。 因此，可以实现一种PTC热敏电阻材料，其可以根据PTCR性质变得可用的温度和电阻率变化的温度等各种性质来控制，并且可以应用于大电流通过的电路部件 正常运行状态。 此外，可以容易地制造PTC热敏电阻材料，其保持稳定的PTCR性能。 此外，PTC热敏电阻材料可以以增加的额定电流工作，尽管尺寸小，并且具有高的形状自由度。