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公开(公告)号：US20160027560A1
公开(公告)日：2016-01-28
申请号：US14774824
申请日：2014-02-17
Applicant: TDK CORPORATION
Inventor： Kazuhiko ITOH , Yoshikazu SHIMURA
CPC classification number: H01C7/025 , C04B35/4682 , C04B2235/3201 , C04B2235/3208 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3239 , C04B2235/3251 , C04B2235/3262 , C04B2235/3298 , C04B2235/3418 , H01C1/1406 , H01C7/008 , H01C7/02
Abstract: A barium titanate based PTC thermistor ceramic composition without using Pb. Its Curie temperature is shifted to a temperature higher than 120° C. The PTC thermistor can readily turn semiconductive even if it is sintered in air. The resistivity at 25° C. is low and the variation rate of the resistivity at 25° C. with time is little. The PTC thermistor ceramic composition includes a sintered body having a barium titanate based compound represented by formula (1) as the main component, (Ba1-x-y-wBixAyREw)α(Ti1-zTMz)O3 (1), wherein, 1.02y≦x≦1.5y (2), 0.007≦y≦0.125 (3), 0≦(w+z)≦0.01 (4), 0.97≦α≦1.06 (5), and the sintered body contains Ca in a ratio of 0.01 mol or more and less than 0.05 mol relative to 1 mol of Ti site in terms of element.
Abstract translation: 不使用Pb的钛酸钡基PTC热敏电阻陶瓷组合物。 其居里温度转移到高于120℃的温度。即使在空气中烧结，PTC热敏电阻也可以容易地转动半导体。 25℃时的电阻率较低，25℃时的电阻率随时间的变化率很小。 PTC热敏电阻陶瓷组合物包括具有由式（1）表示的钛酸钡系化合物作为主要成分的（Ba1-xy-wBixAyREw）α（Ti1-zTMz）O3（1）的烧结体，其中，1.02y＆nlE; x＆ ; 1.5y（2），0.007＆nlE; y＆nlE; 0.125（3），0＆nlE;（w + z）＆nlE; 0.01（4），0.97＆nlE;α＆nlE; 1.06（5） 相对于元素换算的Ti部位为1摩尔，为0.01摩尔以上且小于0.05摩尔。
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Patent Agency Ranking
公开(公告)号：US20170226018A1
公开(公告)日：2017-08-10
申请号：US15422087
申请日：2017-02-01
Applicant: TDK CORPORATION
Inventor： Kazutaka FUJITA , Kazuhiko ITOH , Yoshikazu SHIMURA , Hiroki MORIKOSHI , Tomohiro TERADA
IPC: C04B35/495 , H01C7/02 , H01C1/14
CPC classification number: C04B35/495 , C04B35/462 , C04B35/4682 , C04B35/62615 , C04B35/6263 , C04B35/62645 , C04B2235/3201 , C04B2235/3208 , C04B2235/3215 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3236 , C04B2235/3239 , C04B2235/3251 , C04B2235/3255 , C04B2235/3262 , C04B2235/3268 , C04B2235/3298 , C04B2235/3418 , C04B2235/3427 , C04B2235/79 , C04B2235/9607 , H01C1/14 , H01C7/02 , H01C7/025
Abstract: A semiconductor ceramic composition represented by formula (1), (BavBixAyREw)m(TiuTMz)O3 (1), wherein, A represents at least one element selected from Na and K, RE represents at least one element selected from Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er; 0.750y≦x≦1.50y (2), 0.007≦y≦0.125 (3), 0≦(w+z)≦0.010 (4), v+x+y+w=1 (5), u+z=1 (6), 0.950≦m≦1.050 (7), 0.001 to 0.055 mol of Ca is contained, and 0.0005 to 0.005 mol of at least one selected from Mg, Al, Fe, Co, Cu and Zn is contained.
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公开(公告)号：US20170229219A1
公开(公告)日：2017-08-10
申请号：US15409989
申请日：2017-01-19
Applicant: TDK CORPORATION
Inventor： Kazuhiko ITOH , Yoshikazu SHIMURA , Kazutaka FUJITA , Hiroki MORIKOSHI , Tomohiro TERADA
IPC: H01C7/02 , H01C1/14 , C04B35/645 , C04B35/468 , C04B35/626
CPC classification number: H01C7/022 , C04B35/4682 , C04B35/6261 , C04B35/6264 , C04B35/62675 , C04B35/645 , C04B2235/3201 , C04B2235/3208 , C04B2235/3215 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3236 , C04B2235/3239 , C04B2235/3251 , C04B2235/3255 , C04B2235/3268 , C04B2235/3298 , C04B2235/3436 , C04B2235/5445 , C04B2235/602 , C04B2235/612 , C04B2235/656 , C04B2235/782 , C04B2235/784 , C04B2235/786 , C04B2235/96 , H01C1/14 , H01C7/025 , H01L41/1871
Abstract: A semiconductor ceramic composition which is a BaTiO3 based semiconductor ceramic composition, wherein, part of Ba is replaced by at least A (at least one alkali metal element selected from Na and K), Bi and RE (at least one element selected from rare earth elements including Y), and part of Ti is replaced by at least TM (at least one element selected from the group including of V, Nb and Ta), the relationships of 0.7≦{(the content of Bi)/(the content of A)}≦1.43, 0.017≦{(the content of Bi)+(the content of A)}≦0.25, and 0
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公开(公告)号：US20160005517A1
公开(公告)日：2016-01-07
申请号：US14751812
申请日：2015-06-26
Applicant: TDK CORPORATION
Inventor： Yoshikazu SHIMURA , Kazuhiko ITOH , Kazutaka FUJITA
IPC: H01C7/02 , H01C1/14 , C04B35/462 , H01C7/00
CPC classification number: H01C7/025 , C04B35/462 , C04B35/4682 , C04B2235/3201 , C04B2235/3213 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3239 , C04B2235/3251 , C04B2235/3262 , C04B2235/3272 , C04B2235/3281 , C04B2235/3284 , C04B2235/3298 , C04B2235/3418 , C04B2235/79 , H01C1/14 , H01C7/008 , H01C7/02
Abstract: A semiconductor ceramic composition with small resistivity at room temperature and large temperature coefficient of resistance is provided; the composition is represented by formula, (Ba1-x-y-wBixAyREw)m(Ti1-zTMz)O3 (1), (wherein, A is at least one element from Na or K, RE is at least one element from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er, TM is at least one element from the group consisting of V, Nb and Ta, and w, x, y, z (each in mol) and the mole ratio m of Ba site to Ti site satisfy the following in equations, 0.007≦x≦0.125 (2) x≦y≦2.0x (3) 0≦(w+z)≦0.010 (4) 0.940≦m≦0.999 (5)), and further includes Sr in a proportion of 0.010 mol or more and 0.050 mol or less relative to 1 mol of Ti site, and the mole ratio u of Sr and the mole ratio x of Bi satisfy the following in equation, u≦1.8x−0.008 (6).
Abstract translation: 提供了一种在室温下具有低电阻率和较大的电阻温度系数的半导体陶瓷组合物; 该组成由式（Ba1-xy-wBixAyREw）m（Ti1-zTMz）O3（1）表示，（其中，A是至少一种来自Na或K的元素，RE是至少一种元素， Y，La，Ce，Pr，Nd，Sm，Gd，Dy和Er，TM是由V，Nb和Ta组成的组中的至少一种元素，w，x，y，z（各摩尔） Ba位置与Ti位置的摩尔比m满足下列公式：0.007＆nlE; x＆nlE; 0.125（2）x＆nlE; y＆nlE; 2.0x（3）0＆nlE;（w + z）＆nlE; 0.010（4）0.940＆ ; 0.999（5）），并且还包括相对于1份Ti部位为0.010摩尔以上且0.050摩尔以下的Sr，Sr的摩尔比u和Bi的摩尔比x满足下式 方程，u＆nlE; 1.8x-0.008（6）。
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公开(公告)号：US20170040092A1
公开(公告)日：2017-02-09
申请号：US15222050
申请日：2016-07-28
Applicant: TDK CORPORATION
Inventor： Kazutaka FUJITA , Kazuhiko ITOH , Yoshikazu SHIMURA
CPC classification number: H01C7/027 , C04B35/4682 , C04B35/6261 , C04B35/62625 , C04B35/6263 , C04B35/62645 , C04B35/64 , C04B2235/3201 , C04B2235/3208 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3234 , C04B2235/3239 , C04B2235/3251 , C04B2235/3253 , C04B2235/3255 , C04B2235/3262 , C04B2235/3298 , C04B2235/3418 , C04B2235/602 , C04B2235/606 , C04B2235/6562 , C04B2235/6565 , C04B2235/658 , C04B2235/79 , C04B2235/9607 , H01C1/1406 , H01C7/025
Abstract: A semiconductor ceramic composition including a compound represented by the following general formula (1) as a main component. (BavBixAyREw)m(TiuTMz)O3 (1) (wherein, A represents both elements of Na and K; RE is at least one element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er; and TM is at least one element selected from the group consisting of V, Nb and Ta.) 0.01≦x≦0.15 (2) x≦y≦0.3 (3) 0≦(w+z)≦0.01 (4) v+x+y+w=1 (5) u+z=1 (6) 0.950≦m≦1.050 (7) further, 0.001 mol to 0.055 mol of Ca is included and the ratio of Na/(Na+K) is 0.1 or more and less than 1.
Abstract translation: 此外，含有0.001mol〜0.055mol的Ca，Na /（Na + K）的比例为0.1以上且小于1。
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公开(公告)号：US20150097650A1
公开(公告)日：2015-04-09
申请号：US14502123
申请日：2014-09-30
Applicant: TDK Corporation
Inventor： Yoshikazu SHIMURA , Kazuhiko ITOH
CPC classification number: H01C7/025 , C04B35/4682 , C04B35/6264 , C04B35/62675 , C04B35/62695 , C04B35/63416 , C04B2235/3201 , C04B2235/3208 , H01C1/1406 , H01C7/008 , H01C7/027
Abstract: A semiconductor ceramic composition which includes a compound represented by the following formula (1) as a main component, (Ba1-x-y-wBixAyREw)m(Ti1-zTMz)O3 (1) (wherein, A is at least one element selected from Na or K, RE is at least one element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy and Er, TM is at least one element selected from the group consisting of V, Nb and Ta, w, x, y, z and m satisfy the following relationships of (2)˜(5), 0.007≦x≦0.125 (2), x
Abstract translation: 包含下述式（1）表示的化合物作为主要成分的（Ba1-xy-wBixAyREw）m（Ti1-zTMz）O3（1）的半导体陶瓷组合物（其中，A为选自Na 或K，RE为选自Y，La，Ce，Pr，Nd，Sm，Gd，Dy和Er中的至少一种元素，TM为选自V，Nb和Ta中的至少一种元素 （2）〜（5），0.007＆nlE; x＆nlE; 0.125（2），x
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