摘要
通过改变铌存在形式的方法制备Pb[(Mg1/3Nb2/3)0.8(Sc1/2Nb1/2)0.2]O3(PMNSN)陶瓷。用X射线衍射和透射电镜检测1:1 B位的有序结构,洛伦兹关系和居里温度范围描述极化弛豫行为,研究了陶瓷在300 K和10 kHz时的介电调谐性能。结果表明,该陶瓷具有高介电可调性、低介电损耗等优点,是一种很有应用价值的介电调谐材料。
Pb[（Mg1/3Nb2/3）0.8（Sc1/2Nb1/2）0.2]O3 （PMNSN） ceramics were prepared by the method of modifying niobium type. Detecting the 1：1 B-site ordered structure by XRD and TEM, and describing the dielectric relaxation behavior by Lorentz relation and a small polaron over the curie temperature range, the dielectric tunability properties were investigated at 300 K and 10 kHz. The results show that the prepared PMNSN ceramics have a high dielectric tunability （～ 75% at 30 kV/cm）, low dielectric loss （- 0.003） and high figure of merit （- 250）, it is a promising dielectric tunable material.
出处
《铸造技术》
CAS
北大核心
2013年第3期272-274,共3页
Foundry Technology
关键词
陶瓷
介电调节
极化极性
ceramics
dielectrics properties
polar nanore^ions
