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Journal of Inorganic Materials

Journal of Inorganic Materials

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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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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