ACTIVATED SINTERING OF NATURAL HIGH PURITY MgO-CaO SERIES MATERIALS
ZHANG Zhiping; HUANG Huihuang; LI Guangping (Luoyang Institute of Refractory Research; Ministry of Metallurgical Industry)
Cite this article:
ZHANG Zhiping; HUANG Huihuang; LI Guangping (Luoyang Institute of Refractory Research; Ministry of Metallurgical Industry). ACTIVATED SINTERING OF NATURAL HIGH PURITY MgO-CaO SERIES MATERIALS. Acta Metall Sin, 1986, 22(1): 132-140.
Abstract On the basis of the previous works by the authors, a continuous approach to the calcination-hydration activated sintering of the natural MgO-CaO series materials of high purity was studied with putting much emphasis upon the effect of the ratio of MgO/CaO on the sintering behaviour and upon the resistance of grogs to disintegration as well. It is found that the densification of the two-phase materials is practically completed when the specimens fired at 1400℃ and developed the highly direct-bonded basic grogs of fine microstructure at 1600℃, while that of one-phase end members grows a lot of exaggerated grains with moderate intragranular pore formation resulting in lowering of the density. The activated sintering of the calcination-hydration specimens seems to be related to the adsorption-desorption of OH~- by CaO and MgO. The resistance to disintegration decreases with the increase of their CaO content.
