EFFECTS OF ADDITIVES ON SINTERING OF CVD-MGO POWDERS

作     者：MATSUMOTO, T KATO, A 

作者机构：R&D Center Cement Division Ube Industries 12-32 Nish-honmachi 1-chome Ube City Yamaguchi Prefecture 755 Japan Department of Applied Chemistry Faculty of Engineering Kyushu University Fukuoka Japan 

出 版 物：《CERAMICS INTERNATIONAL》 (Ceram Int)

年 卷 期：1990年第16卷第6期

页      面：325-331页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Refractory Materials 

摘      要：The effects of a large number of sintering aids for the densification of magnesia were examined. Al 2 O 3 , BaO, Fe 2 O 3 , P 2 O 5 , SiO 2 , TiO 2 , Y 2 O 3 and ZrO 2 are effective for the sintering of CVD-MgO powders at low doping levels. The effects of TiO 2 and ZrO 2 are significant. Heavy doping is harmful for densification. The eight oxides above are also effective for the sintering of seawater MgO, but the degree of effectiveness is smaller than for CVD-MgO. In the doping of BaO, P 2 O 5 , SiO 2 and TiO 2 , which form eutectic liquids with MgO below 1600°C, there is an optimum firing temperature for densification. Vickers hardness of doped MgO is proportional to the relative density and is unaffected by doping. Corrosion resistance of MgO ceramics for liquid PbO is also unaffected by dopants, except for P 2 O 5 .