各种LiTaO/ sub3 /相关陶瓷的热释电性能

[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics Pub Date : 1990-06-06 DOI:10.1109/ISAF.1990.200263

H. In, R. von der Muhll, Z. Ye, J. Ravez

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引用次数: 1

摘要

在LiTaO/sub - 3/-Li/sub - 2/O、LiTaO/sub - 3/-LiMgF/sub - 3/-LiMg(OH)/sub - 3/、LiTaO/sub - 3/-Li/sub - 2/SiO/sub - 3/和LiTaO/sub - 3/-CaZrO/sub - 3/体系中获得了高度致密的LiTaO/sub - 3/衍生陶瓷。目的是将陶瓷的组成和织构与其热释电性能联系起来。所有样品都表现出铁电-准电转变。在LiTaO/sub - 3/-CaZrO/sub - 3/体系中，LiTaO/sub - 3型固溶体表现出化学不均匀性导致的弥漫性相变。极化陶瓷的热释电系数接近4 nC-cm/sup -2/ K/sup -1/，含钙和含锆样品的热释电系数可通过快速烧结提高到6 nC-cm/sup -2/ K/sup -1/

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Pyroelectric properties of various LiTaO/sub 3/ related ceramics

Highly densified LiTaO/sub 3/ derived ceramics have been obtained in the LiTaO/sub 3/-Li/sub 2/O, LiTaO/sub 3/-LiMgF/sub 3/-LiMg(OH)/sub 3/, LiTaO/sub 3/-Li/sub 2/SiO/sub 3/ and LiTaO/sub 3/-CaZrO/sub 3/ systems. The purpose was to relate the composition and the texture of the ceramic to its pyroelectric properties. All samples investigated showed a ferroelectric-paraelectric transition. The LiTaO/sub 3/-type solid solution in the LiTaO/sub 3/-CaZrO/sub 3/ system presented a diffuse phase transition resulting from chemical inhomogeneities. The pyroelectric coefficients of polarized ceramics were close to 4 nC-cm/sup -2/ K/sup -1/, a value which can be increased up to 6 nC-cm/sup -2/ K/sup -1/ by quick sintering for the calcium and zirconium containing samples.<>

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[Proceedings] 1990 IEEE 7th International Symposium on Applications of Ferroelectrics

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