不同烧结温度对PMN基铁电陶瓷B位有序度的影响  

Effect of Sintering Temperature on B-Site Order of Pb(Mg_(1/3)Nb_(2/3))O_3 -Based Ferroelectric Ceramics

作　　者：杨超[1] 刘敬松[1] 张敏芳[1] 游美容[1] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,绵阳621010

出　　处：《无机化学学报》2013年第10期2145-2149,共5页Chinese Journal of Inorganic Chemistry

基　　金：四川省教育厅青年基金(No.09ZB095)资助项目

摘　　要：本文研究了不同烧结温度下,CuO添加对0.94PMN-0.06PT(PMN-6PT)弛豫铁电陶瓷B位化学有序度的影响。拉曼和XRD分析结果表明,不同的烧结温度下,离子取代不同,对B位有序度的影响不同。烧结温度在950℃时,主要是Cu2+进入晶格,不影响B位化学有序度;烧结温度在1 080℃时,主要是Cu1+进入晶格,B位化学有序度改变。介温测试所表现出来的弛豫特性与拉曼分析有序度的结果相一致。The effect of CuO doping on B-site order of 0.94Pb （Mg1/3Nb2/3）O3-0.06PbTiO3 （abbreviated as PMN- 6PT） ceramics with different sintering temperatures was studied. The Raman and XRD results revealed that under different sintering temperature, ion substitution was different, which had different influence to B-site order. Sintering temperature at 950 ℃, Cu2＋ ions entered the crystal lattice and made no difference in the B-site order. However, Sintering temperature at 1 080 ℃, Cu1＋ ions entered the crystal lattice and had an effect in the B-site order. The dependence of dielectric constant on temperature illustrated an obvious relaxor characteristic for CuO doped PMN-based ceramics, which was in accord with Raman spectra analysis.

关 键 词：烧结温度 弥散度 有序度 拉曼分析 

分 类 号：TB34[一般工业技术—材料科学与工程]