Removal of iron, chromium and sodium impurities from zinc tungstate (ZnWO4)

被引：6

作者：

Bencs, LF

Raksanyi, K

Szakacs, O

Kovacs, L

Watterich, A

Peter, A

机构：

[1] Res. Laboratory for Crystal Physics, Hungarian Academy of Sciences, H-1502 Budapest

来源：

JOURNAL OF CRYSTAL GROWTH | 1997年 / 181卷 / 04期

基金：

匈牙利科学研究基金会;

关键词：

purification; homogenous precipitation; extraction; atomic absorption and emission spectrometry; UV-VIS spectroscopy;

D O I：

10.1016/S0022-0248(97)00419-3

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Removal of Fe, Cr and Na impurities from ZnWO4 was carried out by the chemical purification of the starting materials for crystal growth. Tungsten trioxide (WO3) and zinc oxide (ZnO) were prepared by novel methods based on homogenous precipitation (using hydrogen peroxide as a complexing agent for sodium tungstate) and liquid-liquid extraction techniques, respectively. The impurity concentrations were determined by graphite furnace atomic absorption spectrometry (GFAAS) and flame atomic emission spectrometry (FAES). The quality improvement of the crystals grown from purified starting materials was demonstrated by ultraviolet-visible (UV-VIS) spectrophotometry.

引用

页码：455 / 458

页数：4

共 18 条

[1] THE PREPARATION AND SCINTILLATION PROPERTIES OF ZINC TUNGSTATE SINGLE-CRYSTALS [J].