摘  要

氧化铝相性纳米粉体是一种多孔性的固体材料，其具有耐磨性强、化学稳定性好、表面活性高等特点，广泛应用于冶金材料、医用材料、陶瓷等领域。然而良好的分散性在这些应用中至关重要，这要求我们对分散机理及高技术分散处理技术有着较为全面的了解。本文采用分步球磨法，通过分步球磨提高了纳米氧化铝粉体的分散性，系统研究了球磨过程和Al3+浓度对氧化铝粉体的粒度和分散性的影响。

通过沉淀法所制备的前驱体在空气中以1180oC煅烧后，演变为所需要的纳米氧化铝粉体。通过分步球磨处理后，纳米粉末球形度好、粒度分布窄，粒径范围为150~200 nm。

本研究所使用的主要原料如下：

（1）九水硝酸铝；

（2）碳酸氢铵（沉淀剂）；

（3）硫酸铵（分散剂）

该论文有图8幅，表1个，参考文献28篇。

关键词：纳米氧化铝粉体 沉淀法 分步卧式球磨 

Prepare Nanosize Alumina Powder by Precipitation

And Performance Study

Abstract

Alumina phase nano powder is a porous solid material, which has strong wear resistance, good chemical stability, high surface activity, widely used in metallurgical materials, medical materials, ceramics and other fields. However, the perfect dispersion in these applications is essential, which requires us to decentralized mechanism and high-tech processing has a more comprehensive understanding. The effect of ball milling process and Al3+ concentration on the particle size and dispersibility of alumina powder was systematically studied by using the method of step-by-step ball-milling to improve the dispersibility of nano-alumina powder by coprecipitation.

Precursors were evolved into Al2O3 phase after subsequent calcination of   1180 oC in air. Step-by-step horizontal ball-milling achieved the well-dispersibility powders with quasi-spherical morphology and the narrow size distribution in the range of 150~200 nm.

The main ingredients used in this study are as follows:

(1) Al(NO3)3·9H2O;

(2) NH4HCO3 (Precipitant);

(3) (NH4)2SO4 (Dispersant).

Key Words: Nano-alumina powder Precipitation Step-by-step horizontal ball-milling 

目  录

摘  要 I

Abstract II

目  录 III

图清单 IIV

表清单 IIV

1 绪论 1

1.1 引言 1

1.2 纳米氧化铝的应用范围 1

1.3 纳米氧化铝的制备方法 2

1.4 纳米氧化铝的研究进展 4

1.5 纳米氧化铝的团聚现象 4

1.6 本论文的研究内容 5

2 纳米氧化铝粉体的制备过程 6

2.1 实验原料 6

2.2 实验流程 6

3 实验结果与分析 8

3.1 Al3+浓度对粒度和分散性的影响 8

3.2 球磨法对粉末的影响 10

4 结论与展望 13

参考文献 14

致谢 17

图清单

图序号 沉淀法制备纳米氧化铝粉体及性能研究:http://www.chuibin.com/wuli/lunwen_206203.html