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首页> 外文期刊>Materials Research >Características estruturais, microestruturais, dielétricas e piroelétricas de ceramicas de Sr xBa1-X Nb2O6 forjadas a quente
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Características estruturais, microestruturais, dielétricas e piroelétricas de ceramicas de Sr xBa1-X Nb2O6 forjadas a quente

机译：热锻Sr xBa1-X Nb2O6陶瓷的结构，微观结构，介电和热电特性

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摘要

The texturing process and the characterization of textured Sr xBa1-xNb2O6 (x = 0.5; x = 0.6) ferroelectric ceramics were investigated. The ceramic bodies were fabricated through two stage sintering. The first and second stage consisted in conventional firing and hot forging of the ceramic bodies, respectively, both at oxygen atmosphere. The forged ceramics achieved high densification level although showing abnormal grain growth. X-ray diffraction, dielectric and pyroelectric analysis showed that is possible to obtain preferential orientation of the [00l] crystallographic planes due to grain arrangement during hot forging. Consequently, the investigated properties for this textured material were strongly dependent on the measurement direction. On the other hand, high room temperature pyroelectric coefficients, of the same order of that obtained for single crystals of same composition, were observed.
机译：研究了织构化Sr xBa1-xNb2O6（x = 0.5; x = 0.6）铁电陶瓷的表征过程和表征。陶瓷体是通过两阶段烧结制成的。第一阶段和第二阶段分别是在氧气气氛下分别对陶瓷体进行常规焙烧和热锻。锻造陶瓷虽然出现了异常的晶粒长大，但却达到了高致密化水平。 X射线衍射，介电和热电分析表明，由于热锻造过程中的晶粒排列，可以获得[00l]晶面的优先取向。因此，对这种纹理材料的研究性能在很大程度上取决于测量方向。另一方面，观察到高室温热电系数，其与相同组成的单晶获得的热释电系数相同。

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