铵矾溶液喷雾热解制备Al<sub>2</sub>O<sub>3</sub>微粉过程中粉体形貌及组成的变化

刘世权; 宋广智; 杨中喜; 王建荣; 戴会生

您当前的位置：

首页 >

文章列表页 >

铵矾溶液喷雾热解制备Al₂O₃微粉过程中粉体形貌及组成的变化

研究论文 | 更新时间：2025-12-10

- 铵矾溶液喷雾热解制备Al₂O₃微粉过程中粉体形貌及组成的变化
- MORPHOLOGY AND COMPOSITION CHANGES DURING PREPARATION OF Al₂O₃ POWDERS BY SPRAY PYROLYSIS OF AMMONIUM ALUM
- 化工学报 2002年第7期
- 作者机构：
  
  1. 山东大学晶体材料研究所
  2. 中国科学院理化技术研究所
  3. 山东建材工业学院材料系
- 作者简介：
- 基金信息：
- DOI：
  中图分类号：
- 网络首发：2002-07-25，
  
  纸质出版：2002-07-25
- 稿件说明：
移动端阅览
刘世权, 宋广智, 杨中喜, 等. 铵矾溶液喷雾热解制备Al₂O₃微粉过程中粉体形貌及组成的变化[J]. 化工学报, 2002,(7).

LIU Shiquan, SONG Guangzhi, YANG Zhongxi, et al. MORPHOLOGY AND COMPOSITION CHANGES DURING PREPARATION OF Al₂O₃ POWDERS BY SPRAY PYROLYSIS OF AMMONIUM ALUM[J]. CIESC Journal, 2002, (7).
刘世权, 宋广智, 杨中喜, 等. 铵矾溶液喷雾热解制备Al₂O₃微粉过程中粉体形貌及组成的变化[J]. 化工学报, 2002,(7). DOI：

LIU Shiquan, SONG Guangzhi, YANG Zhongxi, et al. MORPHOLOGY AND COMPOSITION CHANGES DURING PREPARATION OF Al₂O₃ POWDERS BY SPRAY PYROLYSIS OF AMMONIUM ALUM[J]. CIESC Journal, 2002, (7). DOI：

摘要

以铵矾为原料

采用喷雾干燥结合煅烧热解工艺制得粒径 (d50 )为 5 .82 μm的球形度良好的Al2 O3 微粉 .利用DTA -TG、XRD、SEM及能谱分析研究了喷雾、干燥、热解 3个阶段所得粉体的形貌及组成的变化过程 .喷雾干燥制备的粉体

经进一步烘干、煅烧后

发生脱水、颗粒分离、热解和收缩

粒径不断减小 .煅烧热解所得Al2 O3 微粉的晶型取决于热解温度和时间

1370℃煅烧 2h可获得结晶度良好的球形α -Al2 O3 微粉

Abstract

Globular Al 2O 3 powders with diameter ( d 50 ) of 5.82μm were prepared by spray-drying the solution of ammonium alum combined with pyrolysis process.SEM

XRD

DTA-TG

and Energy Spectrum were used to analyze the morphology and composition changes of powders obtained at different preparation stages.The results showed that the particles prepared by spray-drying were relatively coherent

then were dried

separated

dehydrated and shrunk after drying and pyrolysis processes.As a result

the diameter of powders decreased gradually

and the proportion of bigger particles significantly decreased.The sequence of the phase transition of ammonium alum was found to be NH 4Al(SO 4) 2·12H 2O→NH 4Al(SO 4) 2→Al 2(SO 4) 3→ θ -Al 2O 3→ α -Al 2O 3 according to DTA-TG and XRD results.Sintered at 1370℃ for 2h

α -Al 2O 3 powders of high purity was obtained.

关键词

Keywords

references

浏览量

300

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

温和条件下太阳能光热催化氨合成与分解的研究进展

一种顺序式模拟移动床混合建模与优化策略

基于时序-空间双流卷积神经网络的炼化污水厂进水COD预测模型

咪唑类离子液体过冷行为的机制与调控

变工况下换热网络中的热量传递规律及瓶颈识别与优化

铵矾溶液喷雾热解制备Al2O3微粉过程中粉体形貌及组成的变化

MORPHOLOGY AND COMPOSITION CHANGES DURING PREPARATION OF Al2O3 POWDERS BY SPRAY PYROLYSIS OF AMMONIUM ALUM

DOI：

摘要

Abstract

关键词

Keywords

references

铵矾溶液喷雾热解制备Al₂O₃微粉过程中粉体形貌及组成的变化

MORPHOLOGY AND COMPOSITION CHANGES DURING PREPARATION OF Al₂O₃ POWDERS BY SPRAY PYROLYSIS OF AMMONIUM ALUM