Semiconductor ceramic composition and PTC thermistor

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United States of America Patent

PATENT NO 10014097
SERIAL NO

15222050

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Abstract

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A semiconductor ceramic composition including a compound represented by the following general formula (1) as a main component.

description='In-line Formulae' end='lead'(BavBixAyREw)m(TiuTMz)O3  (1)description='In-line Formulae' end='tail'

(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.)

description='In-line Formulae' end='lead'0.01≤x≤0.15  (2)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'x≤y≤0.3  (3)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0≤(w+z)≤0.01  (4)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'v+x+y+w=1  (5)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'u+z=1  (6)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.950≤m≤1.050  (7)description='In-line Formulae' end='tail'

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.

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Patent Owner(s)

  • 501 TDK CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujita, Kazutaka Tokyo, JP 10 45
Itoh, Kazuhiko Tokyo, JP 43 551
Shimura, Yoshikazu Tokyo, JP 16 16

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