Mg-Fe 산화물계 NTC 서미스터의 特性 = Properties of Mg-Fe Oxide Systems for NTC Thermistor

국문 초록 (Abstract)

조정식 Mg₁-χFe₂+χO₄(이하 Mg계)에서 x를 0.0, 0.025, 0.1, 0.2로 변화시키고, 소결온도를 1100°C~1250°C로 50°C간격으로 변화시켰다. 그 결과, NTC 서미스터의 특성을 잘 나타내었고, 저항온도계수 α는 Mg계일 때 -1.6%/°C로 높은 값을 나타내었고, B정수는 1500 [K]에서 2920 [K]의 범위를 나타내었다. 본 조성의 실험결과로써 Mn-Ni-Co계 서미스터를 Mg-Fe 산화물계 NTC 서미스터로 대체가 가능함을 확인할 수 있었다.

다국어 초록 (Multilingual Abstract)

Mg_{1-x}Fe_{2+x}O₄was prepared by sintering at from 1100℃ to 1250℃ with 50 C intervals, while x was varied from 0.0 to 0.025. 0.1, and 0.2. The results showed the typical properties of NTC(Negative Temperature Coefficient) thermistor. The best temperature coefficient of resistance, α was -1.6%/℃ in the Mg-based sample at 25 C. Thermistor parameter, B was in the range of 1500 [K]∼2920 [K]. As a result, the possibility that Mn-Ni-Co based thermistor could be substituted by the composition used in this study was confirmed.