Ni 양이온 함량과 소성 온도 변화에 따른 NiMnCoO₄계 세라믹스의 미세구조와 전기적 특성 변화 연구

• 영문명: Effects of Ni cation ratio and sintering temperature on microstructure and electrical properties of NiMnCoO₄-based ceramics
• 발행기관: 한국세라믹학회
• 저자명: 박민성(Min Sung Park) 문황제(Hwang Je Mun) 강유빈(Yubin Kang) 즈엉짱안(Trang An Duong) 부아린(Nga-Linh Vu) 안창원(Chang Won Ahn) 이재신(Jae-Shin Lee) 한형수(Hyoung-Su Han)
• 간행물 정보: 『세라미스트』제27권 제3호, 347~358쪽, 전체 12쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2024.09.30

국문 초록

Negative temperature coefficient (NTC) thermistors as temperature sensors play an important role in various electrical/electronic devices and are widely applied in the fields such as, automotive sensor modules, home appliances and control applications. The electrical properties of NTC thermistors can be effectively controlled by regulating the content of their chemical components or changing the microstructures. Therefore, this study investigated the effects of Ni cation ratio and sintering temperature on microstructures, crystal structures, and electrical properties of NiMnCoO4-based ceramics. With increasing Ni content, it was found that sinterability of NiMnCoO4-based ceramics was decreased with forming rock-salt phase of NiO, resulting in degrading resistivity. Furthermore, the spinel structures were detected by X-ray diffraction analysis regardless of sintering temperatures. Notably, values of average grain size for sintered samples were increased with increasing sintering temperature. Besides, it was clarified that electrical properties were significantly influenced by average grain size. The room temperature resistivity was increased from approximately 300 kΩ·cm for the sintered sample at 1100°C to about 600 kΩ·cm for for the sintered sample at 1300o C. On the other hand, the B(25/85) constant was not significantly influenced by the sintering temperature. Accordingly, it is expected that the results of this study are useful for controlling electrical properties of MnCoNiO4-based ceramics.

목차

1. 서론

2. 실험방법

3. 결과 및 고찰

4. 결론

CONFLICTS OF INTEREST

ACKNOWLEDGEMENTS

REFERENCES

키워드

Hopping Negative temperature coefficient (NTC) Semiconductor Thermistor Transition elements