Paper Title:
Effects of Adding Form of Additives on the Structure and Properties of High-Purity Alumina Ceramics
  Abstract

High-purity alumina ceramics was prepared using high-purity α-Al2O3 powder as raw material, nitrates or oxides of magnesium, chromium and copper as additives by a wet ball milling with a later dry pressing forming and normal pressure sintering process. The influence of additives on the sintering temperature, microstructure and bending strength of the prepared alumina ceramics was studies. The results showed that the additive doped with nitrate can be dispersed uniformly in the body with molecule scale, and the oxides obtained by decomposing of nitrates have the higher reactivity. Thus, the nitrate additives have better capacity than oxide additives in reducing the sintering temperature and inhibiting the abnormal grain growth, and the alumina ceramics prepared by adding of nitrate additives have higher density and bending strength.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
1130-1132
DOI
10.4028/www.scientific.net/KEM.336-338.1130
Citation
Q. Ren, X. L. Wu, X. M. He, "Effects of Adding Form of Additives on the Structure and Properties of High-Purity Alumina Ceramics", Key Engineering Materials, Vols. 336-338, pp. 1130-1132, 2007
Online since
April 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Han Ki Yoon, Young Ju Lee, Yi Hyun Park, Joon Soo Park, Akira Kohyama
Abstract:Nano infiltration transient eutectic ceramic (NITE-SiC) was fabricated by hot pressing method using Al2O3 and Y2O3 as sintering additives....
699
Authors: Kai Li Lin, Lei Chen, Jiang Chang, Jian Xi Lu
Abstract:In the present study, Ca2P2O7-doped β-Ca3(PO4)2 bioceramics were fabricated by pressureless sintering process. The effect of Ca2P2O7 on the...
23
Authors: Jun Li, Wen Jie Yuan, Cheng Ji Deng, Hong Xi Zhu
Chapter 12: Ceramic, Refractory and Strong Materials
Abstract:Effect of different sintering additives on reaction-bonded Si3N4/SiC composite ceramics under pressureless was investigated. Si3N4/SiC...
2349
Authors: Rong Li, Rong Zhen Liu, Gao Jian Liu, Zhi Hao Jin
Abstract:The porous silicon carbide ceramics were fabricated by adding a variety of low melting point oxides in this paper. The additives were...
89