| $[BaTiO_3]_{0.9}＋[BaZrO_3, SnO_2, La_2O_3, ZrO_2]_{0.1}$의 Dielectric Properties 및 Temperature Characteristics에 미치는 $Bi_2O_3$의 영향 |
| 이병하, 이경희, 윤영호1, 손상철1, 유광수2 |
명지대학교 무기재료공학과
1삼화콘덴서 공업(주)
2한국과학기술원 광전세라믹스연구실 |
| Effect of $Bi_2O_3$ on Dielectric Properties and Temperature Characteristics of $[BaTiO_3]_{0.9}＋[BaZrO_3, SnO_2, La_2O_3, ZrO_2]_{0.1}$ |
|
|
|
|
|
|
|
| ABSTRACT |
|
Widely used dielectrics, barium titanate was promising material for ceramic capacitor. It was produced by specific formulation with various dopants-La2O3, ZrO2, SnO2, CaZrO3, CaTiO3, CaSnO3, Bi2O3, and etc.-according to demanded properties of capacitor. In this study, we would examinate the study of dielectric properties and temperatuer characteristics (T.C.) with the amount of Bi2O3. The sample was prepared with [BaTiO3]10＋[BaZrO3, SnO2, La2O3, ZrO2]10 and Bi2O3 varied from 1.0, 1.5, 2.0, 2.5 to 3.0wt%. After milling and mixing for 15hrs, each sample was dried and then pressed at 700kg/$textrm{cm}^2$ into pellets. Pellets were fired at 131$0^{circ}C$, for 3hrs in air. As the result of measurements, dielectric constant, break down voltage, and insulation resistance were increased with the amount of Bi2O3, and the resonant frequency was shifted from high frequency to low frequency range. In the case of temperature characteristics, capacitance change rate was symmetrically changed at -$25^{circ}C$ and ＋85$^{circ}C$ respectively. Therefore, it is recognized that the temperature characteristics can be moderated with doping Bi2O3 in our study. |
|
PDF Links
Full text via DOI 
Download Citation 
