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2005•Journal of Jiangsu UniversityRequires access

Preparation of nano-Ni-coated Al_2O_3 composite powder

Zhao Xiao-bing

Open publisher page 2 citations

Abstract

Nano-Ni-coated Al_2O_3 composite powders were prepared by the method of heterogeneous preci-pitation using raw material of α-Al_2O_3,Ni(NO_3)_26H_2O and NH_4HCO_3. The composite powders were characterized by techniques of XRD, SEM, EDS and TEM to determine particle size, composition, phase and morphology. The effects of the mixed style of the precipitator, reagent concentration and supersonic radiation were studied. The results indicated that the use of the lower and mid supersonic radiation could improve the disperse property of the nano-Al_2O_3 in the solution, and spraying the precipitator into the reagent suspension made it possible for the nickel precursor precipitated on the nano-Al_2O_3 rather than spontaneous nucleation.

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What this paper is about

Nano-Ni-coated Al_2O_3 composite powders were prepared by the method of heterogeneous preci-pitation using raw material of α-Al_2O_3,Ni(NO_3)_26H_2O and NH_4HCO_3. The composite powders were characterized by techniques of XRD, SEM, EDS and TEM to determine particle size, composition, phase and morphology. The effects of the mixed style of the precipitator, reagent concentration and supersonic radiation were studied. The results indicated that the use of the lower and mid supersonic radiation could improve the disperse property of the nano-Al_2O_3 in the solution, and spraying the precipitator into the reagent suspension made it possible for the nickel precursor precipitated on the nano-Al_2O_3 rather than spontaneous nucleation.

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Available abstract

Nano-Ni-coated Al_2O_3 composite powders were prepared by the method of heterogeneous preci-pitation using raw material of α-Al_2O_3,Ni(NO_3)_26H_2O and NH_4HCO_3. The composite powders were characterized by techniques of XRD, SEM, EDS and TEM to determine particle size, composition, phase and morphology. The effects of the mixed style of the precipitator, reagent concentration and supersonic radiation were studied. The results indicated that the use of the lower and mid supersonic radiation could improve the disperse property of the nano-Al_2O_3 in the solution, and spraying the precipitator into the reagent suspension made it possible for the nickel precursor precipitated on the nano-Al_2O_3 rather than spontaneous nucleation.

Key concepts: Reagent, Materials science, Nucleation, Composite number, Nano-, Morphology (biology), Suspension (topology), Particle size

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