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    SEMICONDUCTOR CERAMIC AND POSITIVE TEMPERATURE COEFFICIENT THERMISTOR
    4.
    发明公开
    SEMICONDUCTOR CERAMIC AND POSITIVE TEMPERATURE COEFFICIENT THERMISTOR 有权
    HALBLEITERKERAMIK发烧友麻省理工学院温室温泉

    公开(公告)号：EP2377836A1

    公开(公告)日：2011-10-19

    申请号：EP09831970.0

    申请日：2009-12-11

    申请人： Murata Manufacturing Co., Ltd.

    发明人： KISHIMOTO Atsushi ,  KATSU Hayato ,  GOTO Masato ,  ABE Naoaki ,  NAKAYAMA Akinori

    IPC分类号： C04B35/46 ,  H01C7/02

    CPC分类号： H01C7/025 ,  C04B35/4682 ,  C04B35/6262 ,  C04B35/62645 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3208 ,  C04B2235/3224 ,  C04B2235/3227 ,  C04B2235/3262 ,  C04B2235/3298 ,  C04B2235/6584 ,  C04B2235/79 ,  C04B2235/87 ,  Y10T428/256

    摘要： A semiconductor ceramic of the present invention includes a Ba m TiO 3 -based composition, as a main component, having a perovskite structure represented by general formula A m BO 3 . The molar ratio m between an A site and a B site satisfies 1.001 ≤ m ≤ 1.01. Part of Ba constituting the A site is replaced with Bi, Ca, a rare-earth element, and at least one of Li and Na. The content of the Ca when the total number of moles of the elements constituting the A site is 1 mole is 0.05 to 0.20 (preferably 0.125 to 0.175) on a molar ratio basis. A PTC thermistor includes a component body 1 formed of the semiconductor ceramic. Accordingly, there is provided a lead-free semiconductor ceramic that substantially does not contain lead and that has desired PTC characteristics and high reliability,

    摘要翻译： 本发明的半导体陶瓷包括具有由通式A m BO 3表示的钙钛矿结构作为主要成分的Ba m TiO 3基组合物。 A位点与B点之间的摩尔比m满足1.001‰‰‰1.01。 构成A位点的Ba的一部分被Bi，Ca，稀土元素和Li和Na中的至少一种所取代。 构成A位的元素的总摩尔数为1摩尔时，Ca的含量为摩尔比为0.05〜0.20（优选为0.125〜0.175）。 PTC热敏电阻包括由半导体陶瓷形成的部件主体1。 因此，提供了一种基本上不含铅并且具有期望的PTC特性和高可靠性的无铅半导体陶瓷，

    SEMICONDUCTOR CERAMIC AND POSITIVE TEMPERATURE COEFFICIENT THERMISTOR
    5.
    发明公开
    SEMICONDUCTOR CERAMIC AND POSITIVE TEMPERATURE COEFFICIENT THERMISTOR 审中-公开
    HALBLEITERKERAMIK发烧友麻省理工学院温室温泉

    公开(公告)号：EP2371788A1

    公开(公告)日：2011-10-05

    申请号：EP09831968.4

    申请日：2009-12-11

    申请人： Murata Manufacturing Co. Ltd.

    发明人： ABE Naoaki ,  KATSU Hayato ,  GOTO Masato ,  KISHIMOTO Atsushi ,  NAKAYAMA Akinori

    IPC分类号： C04B35/46 ,  H01C7/02

    CPC分类号： C04B35/4682 ,  C04B35/638 ,  C04B2235/3201 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3281 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/604 ,  C04B2235/6584 ,  C04B2235/72 ,  C04B2235/79 ,  C04B2235/85 ,  C04B2235/9661 ,  H01C7/025 ,  Y10T428/2993

    摘要： A semiconductor ceramic of the present invention includes a BaTiO 3 -based composition, as a main component, having a perovskite structure represented by general formula A m BO 3 . Part of Ba constituting an A site is replaced with an alkali metal element, Bi, Ca, Sr, and a rare-earth element. Assuming that the molar ratio of the Ca is x and the molar ratio of the Sr is y, the contents of the Ca and the Sr when the total number of moles of the elements constituting the A site is 1 mole are determined so as to satisfy 0.05 ≤ x ≤ 0.20, 0.02 ≤ y ≤ 0.12, and 2x + 5y ≤ 0.7. A PTC thermistor includes a component body 1 formed of the semiconductor ceramic. Accordingly, even when an alkali metal element and Bi are contained, there is provided a lead-free semiconductor ceramic with high reliability in which the discoloration of a surface is not caused and the degradation of resistance over time can be suppressed even after the application of an electric current for a long time.

    摘要翻译： 本发明的半导体陶瓷包括具有由通式A m BO 3表示的钙钛矿结构作为主要成分的BaTiO 3基组合物。 构成A位置的Ba的一部分被碱金属元素Bi，Ca，Sr和稀土元素代替。 假设Ca的摩尔比为x，Sr的摩尔比为y，则构成A位的元素的总摩尔数为1摩尔时的Ca和Sr的含量被确定为满足 0.05‰¤‰¤0.20，0.02‰¤‰0.12，2x + 5y‰0.7。 PTC热敏电阻包括由半导体陶瓷形成的部件主体1。 因此，即使在含有碱金属元素和Bi的情况下，也可以提供一种高可靠性的无铅半导体陶瓷，其中不会引起表面变色，即使在施加了金属元素后也能够抑制电阻随时间的劣化 电流很长时间。