摘要
以溶胶低温燃烧合成法制备了BaSr Ti O3超细粉末,与商品MgO纳米粉体同为原料,按质量比1∶1的比例制备了BST/MgO复相陶瓷材料。分别在1 150,1 200,1250℃,利用SEM、XRD和LCR对制备出的BST/MgO复相陶瓷的显微结构与介电性能进行了测试分析。结果表明,BaSr Ti O3/MgO复相陶瓷可在1 250℃烧结致密,烧结温度比固相法低150℃左右。介电常数下降至160左右,介电常数对偏压的调谐性达到20%以上(1 kV/mm)。
Ba Sr TiO3/MgO multiphase ceramic material was prepared by using nano-particle Ba Sr TiO3 powders synthesized with low-temperature combustion synthesis of sol and 50% MgO nano-powders as starting materials. The phase composition, grain size and morphology of BaSrTiO3/MgO multiphase ceramic material were observed and analyzed by XRD and SEM. The dielectric properties and tunability were tested by LCR. The results show that Ba Sr TiO3 / MgO multiphase ceramic material can be sintered at 1 250℃, which is about 150℃ lower than temperature sintered by using solid-state reaction method. The dielectric constant was decreased to about 160. The dielectric constant tunability reached more than 20% under applying 1 kV/mm de bias field at 10 kHz.
出处
《青岛大学学报（自然科学版）》
CAS
2007年第3期38-41,共4页
Journal of Qingdao University(Natural Science Edition)
基金
青岛市自然科学基金(05-1-JC-89)
关键词
钛酸锶钡
氧化镁
低温燃烧合成
调谐性能
barium strontium titanate
MgO
low-temperature combustion synthesis
tunability
