Abstract: The glassy powder of the Bi-Si-B-Zn-Al-O system is prepared by sol-gel and melt-quenching methods. The powder is characterized by means of XRD, SEM, EMAX, IR, DSC/TG, and the similarities and differences of the microstructure under different preparations are explored roughly. The results show that both of the two have amorphous structure. Compared with melt-quenching one, the glassy powder of solgel method can be broken easily, and the particle size in the range of 1~10 μm is obtained after ball milling, the element of which is relatively close to the designed. The network structures of the two kinds of glassy powder are similar, the ［BiO₃］ triangular, ［SiO₄］ tetrahedron and ［BO₄］ tetrahedron forming the glass′s basic network, but the meltquenching glassy structure in ［SiO₄］ tetrahedron tends to be like framework, which makes the powder structure more stable, the glass transition temperature slightly higher than the sol-gel glass, and both of them are less than 600℃.

Key words: sol-gel, melt-quenching, Bi-Si-B-O glassy powder, glass structure