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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

高频等离子体超声喷雾热解法制备CuO/Al2O3粉体

唐振方; 钟红海; 黄景清; 凌育远; 曾润莲; 莫党+   

  1. 中国广州分析测试中心; 广州510070; +中山大学物理系; 广州510275
  • 收稿日期:1996-07-15 修回日期:1996-10-14 出版日期:1997-08-20 网络出版日期:1997-08-20

Preparation of CuO/Al2O3 Powders by Ultrasonic Spray Pyrolysis Method in High-Frequency Plasma

TANG Zhenfang; ZHONG Honghai; HUNG Jingqing; LING Yuyuan; ZENG Yunlian; MO Dang+   

  1. National Guangzhou Center of TestingAnalysis Guangzhou 510070 China; +Department of Physics; Zhongshan University Guangzhou 510275 China
  • Received:1996-07-15 Revised:1996-10-14 Published:1997-08-20 Online:1997-08-20

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摘要： 以硝酸盐水溶液为原料、高频感耦等离子体为加热源、超声雾化热解的方法制备CuO／Al2O3粉体．研究发现，溶液浓度及等离子体参数条件对粉体初始态的特性有很大影响，浓度越低；粉体越细．纯Al2O3粉为位径在1μm左右的空心球或壳状碎片，CuO粉由无定型海绵体与平均粒度为20nm的超细粒子组成．混合溶液制得的粉体形貌随着Cu／Al原子比的变化而变化，CuO与Al2O3熔点温度相差较大是导致杨体生成微观过程不同的主要原因．

关键词: 高频等离子体, 喷雾热解法, 纳米粉体, CuO／Al2O3

Abstract: CuO/Al2O3 powders were prepared from aqueous solution by ultrasonic spray pyrolysis in the toil plume region of high-frequency inductively coupled plasma. The morphology of the initial powders
varied with the atomic ratio of Cu/Al and the concentration in Cu(NO3)2-Al(NO3)3 solution. Al2O3 powders had spherical internal void structure and some shell fragments. CuO powders composed
of a mixture of amorphous and ultrafine crystallite, some tens of nanometres in size. The compound powders of CuO/Al2O3, with Cu/Al atomic ratio 1:1, had a similar morphology to pure
CuO powders. The diversity of fusing point between CuO and Al2O3 was the main factor to cause the different micro-processes of powder formation in h.f thermal plasma with a plate power
about 1kW.

Key words: h.f.ICP, spray pyrolysis, nanometre powders, CuO/Al2O3