| 학회 |
한국재료학회 |
| 학술대회 |
2014년 봄 (05/15 ~ 05/16, 창원컨벤션센터) |
| 권호 |
20권 1호 |
| 발표분야 |
B. 나노 재료(Nanomaterials) |
| 제목 |
Hydrothermal Synthesis of Sub-10 nm Ultrafine BaTiO3 Nanopowder |
| 초록 |
BaTiO3 has been widely used as a primary material in various electronic devices including thermistors, electro-optical devices, and multilayer ceramic capacitors (MLCCs) due to its prominent dielectric properties. The advances in portable devices necessitate the fabrication of miniaturized MLCCs maintaining high capacity. BaTiO3 nanoparticles are embedded in both dielectric layers and electrode layers. The BaTiO3 nanoparticles in electrode layers act as a sintering additive to mitigate the shrinkage mismatch between Ni electrode particles and BaTiO3 dielectric particles which is caused by different sintering temperatures of those layers. As the thicknesses of layers decrease, the sizes of the active dielectric BaTiO3 powders and the Ni powders are essential to be reduced below 100 nm. Moreover, the size BaTiO3 powder for sintering retardation of Ni layers should be minimized for better coverage on Ni particles. In this study, sub-10nm-sized BaTiO3 nanopowders are synthesized via facile hydrothermal process with addition of polar aprotic solvents. The phase and morphology of resulting BaTiO3 nanoparticles were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The specific surface areas of the synthesized powders were measured by BET(Brunauer-Emmett-Teller) to estimate the sizes. |
| 저자 |
Changyeon Baek1, San Moon1, Chang-Hak Choi2, Do Kyung Kim1
|
| 소속 |
1KAIST, 2Samsun Electromechanics |
| 키워드 |
BaTiO3; hydrothermal synthesis; sub-10nm
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| E-Mail |
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