Growth defects of lead germanate single crystals grown by the vertical Bridgman method

被引：8

作者：

Wu, XJ

Xu, JY

Jin, WQ

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2005年 / 55卷 / 02期

基金：

中国国家自然科学基金;

关键词：

defects; crystal growth; ferroelectric materials;

D O I：

10.1016/j.matchar.2005.04.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Lead germanate, Pb5Ge3O11 (PGO) single crystals have been grown by the modified vertical Bridgman method. An optical microscope and an electron probe X-ray microanalyser (EPNIA) were used to investigate the growth defects, such as inclusions, negative crystal, bubbles and boundaries. Light scattering particles were observed, most of which were related to PbO inclusions. The formation of negative hexagonal crystals is described. Bubbles and boundaries were also observed in as-grown PGO crystals. An incomplete cleavage plane was also found. To reduce and eliminate growth defects, some suggestions are presented which were performed during growth experiments. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：143 / 147

页数：5

共 12 条

[1] CAPTURE OF INCLUSIONS DURING CZOCHRALSKI GROWTH OF LEAD GERMANATE AND GADOLINIUM MOLYBDATE CRYSTALS [J].