放电等离子烧结与传统烧结法制备(Ba,Sr)TiO_3陶瓷的性能比较

Comparison Between Spark Plasma Sintering and Conventional Sintering of(Ba,Sr)TiO_3 Ceramics

研究分别采用了放电等离子烧结方法（Spark Plasma Sintering，SPS）和普通烧结方法，对（Ba，Sr）TiO3陶瓷进行不同温度下的烧结（1200～1300℃），进而研究了放电等离子烧结对（Ba，Sr）TiO3陶瓷性质的改良能力。实验表明，同温度下SPS法烧结的（Ba，Sr）TiO3陶瓷具有更大的相对介电常数，更低的电流损耗。同时，从SEM照片中观测到SPS烧结法可以较好的改进陶瓷的表面致密度。另外，1240℃下用SPS方法烧结的（Ba，Sr）TiO3陶瓷有着最优良的性质。

（Ba,Sr）TiO3 powders were synthetic in both Spark Plasma Sintering（SPS） method and conventional method at the temperature 1200 1300℃, respectively. The result revealed that the sample which prepared in SPS method was always has a higher dielectric constant with a relatively low dielectric loss at a specific temperature. Also the SEM photos showed the densification of ceramic surface could be improved through the rapid sintering of SPS. Moreover, we observed that 1240℃ is the best temperature for sintering after we tried several others.