Preparation of Cordierite Ceramic Using Mixtures of Ce^(4+)-Modified Amorphous Powder and Oxide Powders

作     者：史志铭 

作者机构：School of Materials Science and EngineeringInner Mongolia University of Technology 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2006年第24卷第z2期

页      面：263-265页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：Project supported by New Century Excellent Talents in University (NCET)  2004 

主　　题：cordierite ceramic amorphous cerium thermal expansion density rare earths 

摘      要：The cordierite ceramic with a high strength and a low thermal expansion coefficient was prepared by using mixtures of Ce4 +-modified cordierite amorphous powder and oxide powders of MgO, Al2O3 and SiO2 as starting materials. The transformation procedure of the powders was analyzed by XRD method and the surface morphology of ceramics was examined by SEM method. The flexural strength was measured in a mechanical property testing machine using the Three-Point-Bending sample. Experimental results show that the ceramic added with 10%(mass fraction) of Ce4+-modified amorphous powder is composed ofα-cordierite and small amount of CeO2 particles, and has a porosity of 15% (volume fraction) and a flexural strength of 32.6 MPa when sintered at 1350℃for 3 h. It is suggested that this low-cost process is suitable for preparing the components such as supports of vehicle exhaust converters and diesel particulate trappers.