| 67Pb(Mg1/3Nb2/3)O3-33PbTiO3单晶的微结构与铁电畴 |
| |
| 引用本文： | 李东林,王评初,罗豪甦,潘晓明,张申,殷之文. 67Pb(Mg1/3Nb2/3)O3-33PbTiO3单晶的微结构与铁电畴[J]. 材料研究学报, 2000, 14(5): 457-462 |
| |
| 作者姓名： | 李东林 王评初 罗豪甦 潘晓明 张申 殷之文 |
| |
| 作者单位： | 中国科学院上海硅酸盐研究所无机功能材料开放实验室 |
| |
| 基金项目： | 国家自然科学基金;59995520; |
| |
| 摘 要： | 用偏光显微镜(PLM)和透射电镜(TEM)观察了67Pb(Mg1/3Nb2/3)O3-33PbTiO3单晶的畴结构.在PLM下,光学质量不同的晶体具有不同的畴结构,透明晶体具有毫米尺度的大畴,透明性差的晶体的带状孪生畴宽约为0.1mm;在TEM下,雾状晶体中存在着复杂的微米尺度的孪生畴,而均匀晶体中存在着不规则的微米尺度的180°畴.原位EDS分析表明,在孪生晶体中存在Nb-Ti-Mg-Pb-O非晶相.透明晶体的介电和压电常数显著地高于雾状晶体.讨论了化学不均性对畴结构的影响.
|
| 关 键 词： | 铁电畴 铁电相变 畴结构 67PMN－33PT铁电单晶 |
| 文章编号： | 1005-3003(2000)05-0457-06 |
| 修稿时间： | 1999-11-03 |
MICROSTRUCTURE AND DOMAIN STRUCTURE OF 67Pb(Mg1/3Nb2/3)O3-33PbTiO3 SINGLE CRYSTAL |
| |
| LI Donglin,WANG Pingchu,LUO Haosu,PAN Xiaoming,ZHANG Shen,YIN Zhiwen. MICROSTRUCTURE AND DOMAIN STRUCTURE OF 67Pb(Mg1/3Nb2/3)O3-33PbTiO3 SINGLE CRYSTAL[J]. Chinese Journal of Materials Research, 2000, 14(5): 457-462 |
| |
| Authors: | LI Donglin WANG Pingchu LUO Haosu PAN Xiaoming ZHANG Shen YIN Zhiwen |
| |
| Abstract: | Ferroelectric domains in 67Ph(Mgl/3Nb2/3)O3--33PbTiO3 single crystals were studied by means of polarized light microscope (PLM) and transmission electron microscopy (TEM) PLM photographs revealed that the domain structures vary with crystal quality. The transparent crystals are usually characterized by large domains millimeters in size. Banded twin domains were found in translucent crystals. TEM study gave similar domain structure to those observed by PLM. The complicated twins were observed in translucent crystals. The irregular 180' domains with size of micrometers were observed in transparent crystals. The in situ EDS analysis showed that the crystals with twins contain Nb-Ti-Mg-Ph--O non--crystalline phase. Dielectric and pizoelectric constants of transparent crystals are better than translucent crystals. Electrical properties and the relevance of domains to corresponding microstructures were briefly discussed. |
| |
| Keywords: | Pb(Mg1/3Nb2/3)O3-based ferroelectric crystal ferroelectric domain ferroelectric transition |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
