沉淀包覆法合成高活性纳米过渡态Al<sub>2</sub>O<sub>3</sub>粉

SUN Zhiping; TENG Yuancheng; ZHANG Cuiying

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沉淀包覆法合成高活性纳米过渡态Al₂O₃粉

更新时间：2025-12-10

- 沉淀包覆法合成高活性纳米过渡态Al₂O₃粉
- CIESC Journal Issue 9, (2006)
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- Online First：25 September 2006，
  
  Published：25 September 2006
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SUN Zhiping, TENG Yuancheng, ZHANG Cuiying. 沉淀包覆法合成高活性纳米过渡态Al₂O₃粉[J]. CIESC Journal, 2006, (9).
DOI：

SUN Zhiping, TENG Yuancheng, ZHANG Cuiying. 沉淀包覆法合成高活性纳米过渡态Al₂O₃粉[J]. CIESC Journal, 2006, (9). DOI：

摘要

Abstract

Transition-Al2O3 nanopowder was first prepared by the precipitation-coated method combined with the freeze drying technique by using AlCl3·6H2O

ammonia

ammonium chloride (NH4Cl) as raw materials

and then characterized with X-ray diffraction (XRD)

thermogravimetric analysis (TGA)

differential scanning calorimetry (DSC)

BET surface area and particle size analyzer.Coating precipitation surface with NH4Cl

adding surface activator

washing with ethanol and freeze drying were used to decrease particle agglomeration.γ-Al2O3 nanopowder with an average diameter of 6.73 nm and γ-δ-Al2O3 nanopowder with an average diameter of 11.92 nm were obtained by calcination of the precursors at 600℃ and 950℃

respectively.Phase transformation of Al2O3，the principle of precipitation surface coated by NH4Cl and the mechanism of anti-agglomeration via surface coating were also investigated.

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沉淀包覆法合成高活性纳米过渡态Al2O3粉

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沉淀包覆法合成高活性纳米过渡态Al₂O₃粉