초소형 회로보호용 적층 PTC 써미스터의 출발원료 및 Sr 첨가에 따른 전기적 특성 (The Electrical Properties of the Laminated PTC Thermistor for Micro Circuit Protection as a Function of Starting Material and Sr Addition)

서지정보

· 발행기관 : 한국세라믹학회
· 수록지 정보 : 한국세라믹학회지 / 48권 / 6호 / 525 ~ 530페이지
· 저자명 : 이미재, 김빛남, 황종희, 김진호, 박성철, 송준백

초록

We investigated the electrical properties the starting material and sintering condition on the laminated PTC thermistor for micro circuit protection. The influences of BaTiO_3 powder with the 0.3 and 0.45 μm size and the electrical characteristics (Ba,Sr)TiO_3 sintered at 1350~1400℃ for 2 h in a reducing atmosphere (1% H_2/N_2). The sintered (Ba,Sr)TiO_3 was increased pore and the grain size was decreased according to increasing Sr additions. In relative permittivity, the phase transition temperature of (Ba,Sr)TiO_3 was decreased for 2.5℃ according to increasing 0.01 mole Sr additions, and the phase transition dose not appeared about 0.3 mole Sr addition. The (Ba,Sr)TiO_3 was show the low resistance from 0.01 mole to 0.05 mole by Sr addition, regardless of sintering temperature. The (Ba,Sr)TiO_3 was show 10^2 jump order at 0.1 and 0.2 mole Sr addition, and PTCR of the sintered (Ba_0.7Sr_0.3)TiO_3 does not appeared about 0.3 mole Sr addition, regardless of the sintering temperature and starting material size.

영어초록

We investigated the electrical properties the starting material and sintering condition on the laminated PTC thermistor for micro circuit protection. The influences of BaTiO_3 powder with the 0.3 and 0.45 μm size and the electrical characteristics (Ba,Sr)TiO_3 sintered at 1350~1400℃ for 2 h in a reducing atmosphere (1% H_2/N_2). The sintered (Ba,Sr)TiO_3 was increased pore and the grain size was decreased according to increasing Sr additions. In relative permittivity, the phase transition temperature of (Ba,Sr)TiO_3 was decreased for 2.5℃ according to increasing 0.01 mole Sr additions, and the phase transition dose not appeared about 0.3 mole Sr addition. The (Ba,Sr)TiO_3 was show the low resistance from 0.01 mole to 0.05 mole by Sr addition, regardless of sintering temperature. The (Ba,Sr)TiO_3 was show 10^2 jump order at 0.1 and 0.2 mole Sr addition, and PTCR of the sintered (Ba_0.7Sr_0.3)TiO_3 does not appeared about 0.3 mole Sr addition, regardless of the sintering temperature and starting material size.

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