Synthesis of ZnWO4 nanocrystalline powders, by the polymerized complex method
Synthesis of ZnWO4 nanocrystalline powders, by the polymerized complex method
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DOI：
10.1016/s0167-577x(02)01022-4
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发表时间：
2003-02-01
影响因子：
3
通讯作者：
Auh, KH
中科院分区：
文献类型：
--
作者：
Ryu, JH;Lim, CS;Auh, KH
以硝酸锌和钨酸为原料，采用聚合络合法成功制备了纳米晶ZnWO4粉末。将聚合物前体在300至600℃的温度下热处理3小时。对前体和热处理粉末的结晶过程、热分解、表面形貌和微晶尺寸进行了评估。 ZnWO4粉末的结晶在400℃下检测到并且在600℃的温度下完全完成。在400和500℃热处理的颗粒主要表现出球形和蚕状形状的共混合形貌，而在600℃热处理的颗粒则表现出更均匀的形貌和较窄的尺寸分布。平均晶体尺寸为19.92-24.16 nm，显示出随温度从400℃到600℃增加的一般趋势。 (C) 2002 Elsevier Science B.V. 保留所有权利。
Nanocrystalline ZnWO4 powders were successfully prepared by the polymerized complex method using zinc nitrate and tungstic acid as starting materials. The polymeric precursors were heat-treated at temperatures from 300 to 600 degreesC for 3 h. The precursors and heat-treated powders were evaluated for crystallization process, thermal decomposition, surface morphology and crystallite size. Crystallization of the ZnWO4 powders was detected at 400 degreesC and entirely completed at a temperature of 600 degreesC. The particles heat-treated at 400 and 500 degreesC showed primarily co-mixed morphology with spherical and silkworm-like forms, while the particles heat-treated at 600 degreesC showed more homogeneous morphology with a narrow size distribution. The average crystalline sizes were 19.92-24.16 nm, showing an ordinary tendency to increase with the temperatures from 400 to 600 degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.