Paper Title:

Hydrochloric Acid Corrosion Behavior of Nb2O5-Al2O3 Ceramics Prepared by Microwave Sintering

Periodical Advanced Materials Research (Volumes 418 - 420)
Main Theme Materials Processing Technology
Edited by Xianghua Liu, Zhengyi Jiang and Jingtao Han
Pages 55-58
DOI 10.4028/www.scientific.net/AMR.418-420.55
Citation Yun Long Ai et al., 2011, Advanced Materials Research, 418-420, 55
Online since December, 2011
Authors Yun Long Ai, Fei He, Bing Liang Liang, Wen He, Li Liu
Keywords Al2O3, Microwave Sintering, Nb2O5, SKP
Price US$ 28,-
Article Preview
View full size
Abstract

The influences of Nb2O5 on the phase, microstructure and hydrochloric acid corrosion behaviors of Nb2O5-Al2O3 ceramics sintered with 2.45 GHz microwave energy were investigated. The results showed that Nb2O5 reacted completely with Al2O3 to form AlNbO4 and densified the pure Al2O3 at a lower sintering temperature and in a short sintering time. Nb2O5-Al2O3 ceramic samples were corroded in diverse concentration hydrochloric acid for different time. Weight loss rate of Nb2O5-Al2O3 ceramic rose dramatically when the corrosion time was not longer than 4 h, and it increased slowly beyond 24 h. After Nb2O5-Al2O3 ceramic samples were corroded for 1 h, pitting corrosion was observed by scanning electric microscope, which was consistent with the analysis results of the scanning Kelvin Probe.