La2O3掺杂复合(PbxSr1−x)TiO3硼硅酸盐玻璃陶瓷的介电性能

IF 18.6 1区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Advanced Ceramics Pub Date : 2013-12-05 DOI:10.1155/2013/879758

C. Gautam, D. Kumar, O. Parkash, O. P. Thakur

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引用次数: 3

摘要

铁电(PbxSr1−x)TiO3 (PST)钙钛矿相在硼硅酸盐玻璃基体中结晶，选择合适的成分和热处理工艺。La2O3是PST的供体掺杂剂，可使其具有半导体性质。在玻璃陶瓷样品中，半导体钙钛矿相在绝缘玻璃基体中的分散可能导致晶体-玻璃界面周围形成空间电荷极化，从而导致高的有效介电常数。因此，以开发高介电常数玻璃陶瓷为目的，制备了64[(PbxSr1−x)O·TiO2]-25[2SiO2·B2O3]-5[K2O]-5[BaO]-1[La2O3]体系的玻璃()。结果表明，La2O3的加入对PST钙钛矿相玻璃陶瓷的结晶和介电性能有明显影响。所有的玻璃陶瓷样品在其相对T图中都显示出弥漫性的宽居里峰。居里峰温度取决于玻璃陶瓷样品的成分和测量频率。

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Dielectric Properties of La2O3 Doped Composite (PbxSr1−x)TiO3 Borosilicate Glass Ceramic

Ferroelectric (PbxSr1−x)TiO3 (PST) perovskite phase has been crystallized in borosilicate glassy matrix with a suitable choice of composition and heat treatment schedule. La2O3 is a donor dopant for PST and can make it semiconducting. Dispersion of semiconducting perovskite phase in insulating glassy matrix in glass-ceramic samples may lead to the formation of space charge polarization around crystal-glass interface, leading to a high value of effective dielectric constant, . Therefore, with the aim of the developing glass ceramics with high dielectric constant, glasses in the system 64[(PbxSr1−x)O·TiO2]-25[2SiO2·B2O3]-5[K2O]-5[BaO]-1[La2O3] have been prepared (). It is found that the addition of La2O3 strongly affected the crystallization and dielectric behavior of glass-ceramic with PST perovskite phase. All glass ceramic samples show a diffuse broad Curie peak in their versus T plots. Curie peak temperature, , depends on compositions of the glass-ceramic samples as well as frequency of measurements.

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来源期刊

Journal of Advanced Ceramics MATERIALS SCIENCE, CERAMICS-

CiteScore

21.00

自引率

10.70%

发文量

290

审稿时长

14 days

期刊介绍： Journal of Advanced Ceramics is a single-blind peer-reviewed, open access international journal published on behalf of the State Key Laboratory of New Ceramics and Fine Processing (Tsinghua University, China) and the Advanced Ceramics Division of the Chinese Ceramic Society. Journal of Advanced Ceramics provides a forum for publishing original research papers, rapid communications, and commissioned reviews relating to advanced ceramic materials in the forms of particulates, dense or porous bodies, thin/thick films or coatings and laminated, graded and composite structures.