B_(2)O_(3)含量对磷酸盐玻璃结构和性能的影响及其成纤工艺初探

Effect of B_(2)O_(3) Content on the Structure and Properties of Phosphate Glass and Preliminary Study on the Fiber-Forming Process

采用熔融冷却法制备不同B_(2)O_(3)含量的P_(2)O_(5)-CaO-B_(2)O_(3)(PCB)系磷酸盐玻璃,研究B_(2)O_(3)含量对结构以及热稳定性的影响,选取单位表面积失重量最大的玻璃样品,通过高温黏度与差示扫描量热(DSC)测试分析,初探该玻璃的成纤工艺。结果表明,B_(2)O_(3)质量分数为3%时,P-O-P键被破坏;B_(2)O_(3)质量分数达到12%时,B^(3+)参与形成键强较大的P-O-B键,此时玻璃的热稳定性达到最佳;B_(2)O_(3)质量分数达到18%时,[BO_(3)]、[BO_(4)]单独存在并参与玻璃网络结构的形成,说明PCB三元系统磷酸盐玻璃具有成纤的可能性,并发现低拉丝速率会造成纤维表面存在缺陷。研究结果可为后续功能性PCB玻纤的研究提供参考。

Phosphate glass in the P_(2)O_(5)-CaO-B_(2)O_(3)(PCB)system with different B_(2)O_(3) contents were prepared by melt-cooling method.The influence of B_(2)O_(3) content on the structure and thermal stability was investigated.And the glass with the largest weight loss per unit area was selected for preliminary investigation of glass fiber formation process combined with high temperature viscosity and differential scanning calorimetry(DSC)analysis.The results showed that the P-O-P bond was broken down when the mass percentage of B_(2)O_(3) was 3%.When it reached 12%,B^(3+)participated in the formation of the P-O-B bond with a greater bond strength,resulting in the highest thermal stability of the glass.At the mass percentage of 18%,[BO_(3)]and[BO_(4)]were present and contributed to the formation of the glass network structure.Finally,this study demonstrated the feasibility of forming phosphate glass fibers in a ternary system with PCB.It was also found that a lower drawing rate could result in defects on the fiber surface.These results provide a basis for future research on functional PCB glass fibers.