摘要：为获得热性能优异的无铅玻璃粉体, 采用溶胶凝胶法制备Bi₂O₃-SiO₂-B₂O₃-ZnO-Al₂O₃系玻璃粉体, 通过扫描电镜 (SEM) 、差示量热扫描仪 (DSC) 、X射线衍射仪 (XRD) 、热膨胀仪、“纽扣”实验等测试分析手段测定玻璃粉形貌、特征温度、晶化特性、热膨胀性及流动性, 分析各性能之间的联系。结果表明:溶胶凝胶法制备的玻璃料疏松多孔, 球磨后粒径主要分布于0.1~1μm;玻璃化温度为485℃、软化温度为541℃;在25~1 000℃范围内玻璃粉体为非晶态;热膨胀系数α_l (25~300℃) 为6.57×10^-6℃^-1;在700~725℃烧结具有良好的流动性。

关键词：溶胶凝胶法；Bi₂O₃-SiO₂-B₂O₃-ZnO-Al₂O₃玻璃粉体；热性能

Abstract：To obtain lead-free glass frits with excellent thermal properties, Bi₂O₃-SiO₂-B₂O₃-ZnO-Al₂O₃ glass powders were prepared by sol-gel method. Morphologies, characteristic temperature, crystallization characteristics, thermal expansion and flexibility of glass were investigated by scanning electron microscopy (SEM) , differential scanning calorimetry (DSC) , X-ray diffraction test analysis (XRD) , thermal expansion instrument and “button” experiments. The connection between these properties was analyzed. The results show that sol-gel glass powders are porous. The ball milled particle size is mainly in0.1~1 μm and glass transition temperature is 485 ℃, the softening temperature is 541 ℃. The glass powder is amorphous in the range of 25~1 000 ℃. The thermal expansion coefficient is 6.57×10^-6℃^-1ranging from 25 to 300 ℃, it presents a good flexibility when firing at 700~725 ℃.

Keywords: sol-gel method；Bi₂O₃-SiO₂-B₂O₃-ZnO-Al₂O₃ glass powders；thermal properties