Growth and Characterisation of Gel‐grown Lead(II)Chloride and Lead(II)Bromide Single Crystals
作者:
P. Sagayaraj,
S. Sivanesan,
R. Gobinathan,
期刊:
Crystal Research and Technology
(WILEY Available online 1995)
卷期:
Volume 30,
issue 3
页码: 299-306
ISSN:0232-1300
年代: 1995
DOI:10.1002/crat.2170300304
出版商: WILEY‐VCH Verlag
数据来源: WILEY
摘要:
AbstractSingle crystals of pure and doped lead(II)chloride and lead(II)bromide were grown by gel technique employing a modified two‐stage chemical reaction. Methods to minimise the predomination of needle morphology during the growth of these crystals have been investigated and the results are discussed. The grown crystals were characterised by optical transmission spectrum. Undoped and monovalent cation (K+, Na+, Cu+, Ag+and Hg+) doped crystals of PbCl2and PbBr2were subjected to d.c. electrical conductivity studies. Using the logσTversusT−1plot, the activation energies for the migration of anion vacancies in lead(II)halides are calculated. They are found to be less for the doped crystals than those of undoped
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