WANG Chuanyun ¹, ZHANG Yazhong ¹, ZHOU Ningsheng ², XIA Yi ¹

(1. Engineering Laboratory of High Temperature and Wear-resistant Materials of Henan Province, Henan University of Technology,

Zhenghzou 45000, Henan, China; 2. High Temperature Materials Institute, Henan University of Science and

Technology, Luoyang 471003, Henan, China)

Abstract:Porous anorthite can be prepared by taking advantage of the decomposition and mass loss of suitable starting materials.Characteristics of the starting materials will influence properties of the synthesized anorthite and are thus worth investigating. Using commercial alumina or aluminum hydroxide as alumina source, porous anorthite was prepared and the properties of the samples were compared. The thermal behavior of the adopted starting materials was investigated by means of TG-DSC. The microstructure was observed and analyzed by means of XRD, SEM and EDS. The apparent porosity (AP), bulk density and cold compressive strength (CCS) of the synthesized porous anorthite were measured. The properties of the synthesized porous anorthite, using the alumina and the aluminum hydroxide as Al₂O₃ source respectively and fired at 1300 °C and 1250 °C respectively, were compared, highlighted by AP 35% vs 54%, CCS 60 MPa vs 30 MPa, pore sizes concentrated around 10 μm vs 8 μm, respectively. 

Key words:Anorthite; Porous material; Commercial alumina; Commercial aluminium hydroxide; Properties; Microstructure