| 掺铁Pb(Mg1/3Nb2/3)O3-0.26PbTiO3单晶的生长及性能研究 |
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| 引用本文： | 唐艳学,罗豪甦,赵祥永.掺铁Pb(Mg1/3Nb2/3)O3-0.26PbTiO3单晶的生长及性能研究[J].科学通报,2009,54(17):2483-2488. |
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| 作者姓名： | 唐艳学 罗豪甦 赵祥永 |
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| 作者单位： | 上海师范大学光电材料与器件重点实验室;中国科学院上海硅酸盐研究所; |
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| 基金项目： | 国家自然科学基金(批准号:60807036);;上海市教育发展基金会晨光计划(编号:2007CG57);;上海市科委(编号:08JC1417200);;上海师范大学(编号:SK200818)资助项目 |
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| 摘 要： | 采用改进的布里奇曼法(坩埚下降法)生长了掺0.3%(摩尔分数) Fe的0.74Pb(Mg1/3Nb2/3)O3- 0.26PbTiO3(PMN-0.26PT)单晶. 系统研究了该单晶的生长、结构、介电和热释电性能, 并与纯PMN-0.26PT单晶进行了比较. 研究发现, 掺杂晶体的畴宽度明显大于纯晶体; 单晶的矫顽场和剩余极化都明显增大; 在居里温度以下, 介温谱上出现两个大的异常, 温度较纯晶体更接近于室温. 实验结果表明, 掺杂离子通过缺陷偶极对2Fe′Ti -V??o对畴起钉扎作用, 增加了晶体的矫顽场, 降低了晶体的介电常数和介电损耗, 提高了晶体的探测优值, 并保持高的电压响应优值, 这对PMN-PT单晶的实际应用非常有利. 这种高性能的热释电和压电单晶的掺杂改性研究将会更好地增进对其高性能本质的理解.
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| 关 键 词： | PMN-0.26PT单晶 掺铁 热释电 |
| 收稿时间： | 2009-04-27 |
Growth and characterization of Fe-doped Pb(Mg_(1/3)Nb_(2/3))O_3-0.26PbTiO_3 single crystals |
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| TANG YanXue,LUO HaoSu & ZHAO XiangYong Key Laboratory of Optoelectronic Material , Device,Shanghai Normal University,Shanghai ,China.Growth and characterization of Fe-doped Pb(Mg_(1/3)Nb_(2/3))O_3-0.26PbTiO_3 single crystals[J].Chinese Science Bulletin,2009,54(17):2483-2488. |
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| Authors: | TANG YanXue LUO HaoSu & ZHAO XiangYong Key Laboratory of Optoelectronic Material Device Shanghai Normal University Shanghai China |
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| Institution: | TANG YanXue1,LUO HaoSu2 & ZHAO XiangYong2 1 Key Laboratory of Optoelectronic Material , Device,Shanghai Normal University,Shanghai 200234,China,2 Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201800 |
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| Abstract: | 0.3 mol% Fe-doped 0.74Pb(Mg1/3Nb2/3)O3-0.26PbTiO3 (PMN-0.26PT) single crystals were grown by a modified Bridgman technique. The structure, dielectric and pyroelectric properties of the Fe-doped crystals were investigated and compared with pure PMN-0.26PT crystals. The investigations showed that small concentrations of Fe substitution increased the coercive field and remnant spontaneous polarization. Two dielectric anomaly peaks were observed under Curie temperature in the dielectric constant versus temperat... |
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| Keywords: | PMN-0 26PT single crystals Fe-doped pyroelectric |
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