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 [BiO

3

]

triangular

[SiO

4

]

tetrahedron and [BO

4

]

tetrahedron forming the glass′s basic

network

but the meltquenching glassy structure in [SiO

4

]

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℃.