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Dielectric and Electro-optic Property of Zirconium Titanate Single Crystal

钛酸锆单晶的介电和电光性能

基本信息

批准号：
03805066
负责人：
IKAWA Hiroyuki
金额：
$ 1.22万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

The schedule of this research was to grow up single crystals of zirconium titanate having considerable quality followed by studying dielectric and electro-optic properties on that single crystal. We have succeeded, however, to grow up only small crystals in mm sizes. That is the reason of no reports on those properties. Accordingly, this abstract is not necessarily consistent with the title. Accordingly, the study to grow up large crystal is now on progress under a revised idea.Single crystals were synthesized by means of floating zone (FZ) and flux methods. Powder of zirconium titanate was mixed with the flux --lithium molybdate and molybdenum trioxide, then dissolved by heating 1300ﾟC in a platinum crucible followed by cooling at 1.9ﾟC/min rate. Needle like single crystals grew less than 3 mm in length, 0.3 mm in width.The condition of the best crystal, although it smaller than 3 mm, by the FZ method within of this experiments was as follows: the composition of the floating zone was in 30:70 for mole ratio of ZrO_2:TiO_2, that of the feeding rod was 47:53.Microwave dielectric properties were investigated in the ZrTiO_4-Y_2O_3-Nb_2O_5 system. The property vs composition relation of the solid solutions was partly similar to that of the ZrTiO_4-SnO_2 system, however, a significant difference was revealed in the relations between two systems. That deference between the systems is notable because it was predicted by the working hypotheses on this compounds which was proposed by us.

本研究的计划是生长具有相当质量的钛酸锆单晶，然后研究该单晶的介电和电光特性。然而，我们已经成功地只生长出了毫米大小的小晶体。这就是没有关于这些财产的报告的原因。因此，本摘要不一定与标题一致。相应地，在新的生长思路下，生长大尺寸晶体的研究也在不断发展。将钛酸锆粉末与助熔剂--三氧化二锂和三氧化钼混合，然后通过在铂坩埚中加热1300 ℃溶解，随后以1.9 ℃/min的速率冷却。在本实验范围内，用FZ法生长出的针状单晶体长度小于3 mm，宽度小于0.3mm，最佳晶体生长条件为：ZrO_2：TiO_2摩尔比为30：70，加料棒为47：53。该固溶体的性质与组成关系与ZrTiO_4-SnO_2系统的性质与组成关系部分相似，但两者之间的关系有很大差异。系统之间的差异是值得注意的，因为它是由我们提出的关于这种化合物的工作假设所预测的。