Crystallization and dielectric properties of lead-free glass-ceramic composites with Gd_2O_3 addition

作     者：Zhou, Yi Zhang, Qingmeng Luo, Jun Tang, Qun Du, Jun 

作者机构：Advanced Electronic Materials Institute General Research Institute for Nonferrous Metals Beijing 100088 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2012年第31卷第3期

页      面：281-284页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China (No. 51107005) 

主　　题：Gd2O3 addition glass-ceramic composites crystallization dielectric properties ferroelectricity 

摘      要：Lead-free glass-ceramic composites in barium sodium niobate silica system with Gd2O3 addition were synthesized through melt-casting fol-lowed by controlled crystallization technique. Crystallization and dielectric properties of the Gd2O3 adding glass-ceramic composites were investigated. With the increase in the concentration of Gd2O3, the glass transition temperature and the crystallization temperature of the pre-cursor glass shift towards the higher temperature. The crystallization behavior that occurred during the heat treatment procedure leads to the enhancement of dielectric constant. All the three compositions of glass-ceramic composites exhibit ferroelectricity when tested at room tem-perature. Both the values of the remanent polarization and coercive field are enhanced regularly with the gradual increase in the concentration of Gd2O3 additive under the same testing field.