| 학회 | 한국재료학회 |
| 학술대회 | 2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 | 27권 2호 |
| 발표분야 | A. 전자/반도체 재료 분과 |
| 제목 | Transient lquid phase sintering of BaTiO3-(Bi,Na)TiO3 relaxor ferroelectric ceramics |
| 초록 | Barium titanate – bismuth sodium titanate (BaTiO3- (Bi,Na)TiO3, BT-BNT) is well-known as a ceramic with stable high-temperature dielectric properties. But the sintering temperature of BT-BNT ceramic is high as approximately 1200℃ ~ 1250℃. Thus, co-firing of BT-BNT with base metal electrodes is limited. In this study, nanoparticle synthesis of BT-BNT and introduction of various sintering additives were tested to reduce the sintering temperature of BT-BNT. BT and BNT were synthesized as nanoparticles through hydrothermal synthesis. Through hydrothermal synthesis, BT particles of 90-120 nm and BNT particles of 100-150 nm were obtained. Upon sintering, small amount of sintering additives such as CuO-Bi2O5 and ZnO-Bi2O5 were added to BT-BNT nanoparticles. The CuO-Bi2O5 and ZnO-Bi2O5 additives in near eutectic composition could form transient liquid phase to enhance the mass transport upon sintering of the BT-BNT ceramics, consequently the sintering temperature could be successfully lowered to 900℃. To investigate the characteristics of the BT-BNT sintered body, the following analysis was performed. The microstructure observed by Fe-SEM and crystal structure and phase formation figured out via XRD. The dielectric properties such as high-temperature dielectric permittivity, loss are measured in the wide frequency range. |
| 저자 | 김백천1, 송태영2, 김한울1, 권도균2 |
| 소속 | 1한국항공대, 2신소재공학과 |
| 키워드 | BT-BNT; Nanoparticle; Low-temperature sintering; Sintering additives |
