Nano-crystal glass-ceramics obtained by crystallization of vitrified red mud.
Glass has been obtained by melting red mud from Shandong Province in China with different additives. Suitable thermal treatments were employed to convert the obtained glass into nano-crystal glass-ceramics. X-ray diffraction (XRD) patterns showed that the main crystalline phase in both the glass-ceramics is wollastonite (CaSiO3). These crystals are homogeneously dispersed within the parent glass, with an average crystal size of less than 100 nm. The size of nano-crystals varies when different thermal processes were used. Physical and mechanical properties, such as density, thermal expansion coefficient, hardness, and bending strength, of the two glasses have been examined and the corresponding microstructures are discussed. These results demonstrate that both glass-ceramics have potential for a wide range of construction application.
Peng
Fei
F
Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China. pengf02@mails.tsinghua.edu.cn
Liang
Kai-Ming
KM
Shao
Hua
H
Hu
An-Min
AM
D000535:Aluminum; D017610:Calcium Compounds; D002516:Ceramics; D002681:China; D003247:Conservation of Natural Resources; D003460:Crystallization; D005898:Glass; D006358:Hot Temperature; D007220:Industrial Waste; D036103:Nanotechnology; D017640:Silicates; D014961:X-Ray Diffraction
D017610:Calcium Compounds; D007220:Industrial Waste; D017640:Silicates; D000535:Aluminum; C031293:calcium silicate