材料期刊网

Sol-gel Preparation and Infrared Radiation Property of Boron-substituted Cordierite Glass-ceramics

Shuming Wang Fenghua Kuang

材料科学技术（英）

Boron for aluminum substitution in the cordierite structure has been examined by sol-gel preparation of different samples along the compositional junction Mg₂Al_4-xB_xSi₅O₁₈ with x=0, 0.5, 1, 1.5. By increasing the x value from 0 to 1.5 the crystallization behavior changed accordingly. Proper amount B₂O₃ doping can promote the sintering of amorphous cordierite gel, effectively restrain the precipitation of μ-cordierite and enhance the crystallization of α-cordierite. The substitution of B³⁺ for Al³⁺ in cordierite crystal structure can effectively improve the near-infrared spectral emissivity of this cordierite based glass-ceramics.

关键词: Sol-gel , Glass-ceramics , Infrared radiation , B3+-substituted , Solid solution