| Effect of BPO4-B2O3 Composite Additive on Crystallization
and Sintering of Silica Ceramics |
Jialu Li,a Yuanbing Li,a, b, * Shujing Lia, b and Kun Xianga
Pages : 29-34
DOI : 10.1080/0371750X.2024.2282466 |
| Abstract |
| BPO4-B2O3 composite additive enhanced silica ceramics were successfully prepared
by solid phase sintering. The effects of BPO4-B2O3 addition and sintering temperature
on the microstructure and phase composition and mechanical properties of silica
ceramics were analysed by scanning electron microscopy and X-ray diffraction
techniques. The results showed that at 1200o-1400oC, BPO4-B2O3 composite additive
formed a glass phase in the sample, filled the pores, and improved the sintering
densification of the sample. In addition, the addition of 9 wt% BPO4-B2O3 successfully
inhibited the crystallization of fused silica, which significantly improved the
mechanical strength of silica ceramics. After sintering at 1200oC for 3 h, the apparent
porosity of silica ceramics with 9 wt% BPO4-B2O3 was only 1.33%, and the cold
modulus of rupture reached a maximum of 60.99 MPa, which was about 35 times that
of pure silica ceramics. It is shown that adding BPO4-B2O3 composite additive provides
a feasible method for preparing silica ceramics with good mechanical properties. |
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