铌酸铅钾单晶的生长、力学性能及畴

2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) Pub Date : 2015-10-01 DOI:10.1109/SPAWDA.2015.7364523

Tian Tian, Wen‐bin Liu, Jiayue Xu

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引用次数: 0

摘要

采用Bridgman法通过自发成核成功地生长出了钨青铜铌酸铅钾(Pb2KNb5O15, PKN)单晶。在优化的生长条件下，晶体透明，无裂纹，无夹杂物。采用维氏显微硬度法测定了合金的力学性能。结果表明:合金的维氏显微硬度与载荷的关系为Hv=1.90P-0.2057GPa。在PKN晶体中观察到条形结构域。温度升高过程中结构域的变化表明，PKN的Currie温度在460 ~ 470℃之间。

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Growth, mechanical property and domains of lead potassium niobate single crsytal

Lead potassium niobate (Pb2KNb5O15, PKN) single crystal with tungsten bronze has been successfully grown by Bridgman method through spontaneous nucleation. Under the optimized growth conditions, the crystal was transparent, cracks free and inclusions free. The mechanical property was measured through the Vickers microhardness technique. The result showed that the relationship between the Vickers' microhardness and load could be described as Hv=1.90P-0.2057GPa. Strip-shaped domains were observed in PKN crystals. The changes of the domains during the temperature increasing process indicated that the Currie temperature of PKN was in the range of 460-470°C.

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2015 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)

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