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Semiconductor ceramic composition and ptc thermistor
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<=2.0x (3), 0!<=(w+z)!<=0.01 (4), 0.94!<=m!<=0.999 (5)). And the semiconductor ceramic composition includes Ca in a proportion of 0.01~0.055 mol in terms of element relative to 1 mol of Ti sites.
Semiconductor ceramic composition and ptc thermistor
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<=2.0x (3), 0!<=(w+z)!<=0.01 (4), 0.94!<=m!<=0.999 (5)). And the semiconductor ceramic composition includes Ca in a proportion of 0.01~0.055 mol in terms of element relative to 1 mol of Ti sites.
Semiconductor ceramic composition and ptc thermistor
YOSHIKAZU SHIMURA (author) / KAZUHIKO ITOH (author)
2015-04-15
Patent
Electronic Resource
English