P2O5-B2O3-V2O5无铅低熔玻璃形成能力和结构

The Structure and Glass Formation Ability of the P_2O_5-B_2O_3-V_2O_5 Lead Free Low Melting Glass

以取代用作封接玻璃和电子浆料粘接相含铅低熔玻璃为目的,实验研究了P2O5-B2O3-V2O5体系玻璃的形成能力,结构和低熔性能。P2O5-B2O3-V2O5体系中,组成在B2O35%～30%、V2O50%～45%、P2O55%～50%(物质的量浓度,下同)区域内的玻璃具有较强的玻璃形成能力,较低的转变温度、良好的重熔流动性和抗析晶性能。优选玻璃组成为:15P2O5-35V2O5-25B2O3-3SiO2-2Al2O3-10ZnO-5SnO-7BaO-3Bi2O3,玻璃转变温度为308℃,在450℃玻璃细粉重熔熔体流动性好,适合用作在450～500℃烧结的封接玻璃和电子浆料的粘接相。红外光谱分析表明:玻璃结构是由大量孤立的[PO4]、[BO3]、[VO2]和[VO3]基团形成的层状结构,在层与层之间有少量的诸如B-O-B、P-O-P、P-O-V、P-O-B等桥氧键连接。

The structure, low melting characteristic, and glass formation ability of the P2O5-B2O3-V2O5 ternary were examined as potential replacement to lead contained low melting glasses for sealing glasses and adhesive agent of electric paste. A composition region with proper glass formation ability in the P2O5-B2O3-V2O5 ternary glass system was evaluated as： B2O3 5%-30% , V2O5 0%-45% , P2O5 5%-50%. The glasses in powder form of 1-40μm with the compositions in the above region possess preferable low melting characteristic, proper fluidity at re-melting, and appropriate anti-crystallization property. A preferable composition is found as：15P2O5-35V2O5-25B2O3-3SiO2-2Al2O3-10ZnO-5SnO-7BaO-3Bi2O3, and the glass transition point of the glass is 308 ℃, and the fluidity of the glass in fine-powdered frit form is appropriate when re-melted at 450℃. The glass is proper for the sealing glass and adhesive agent ot electric pastes fired at 450-500℃. Infrared spectra analyses of the glasses revealed that the structure of glass is layer upon layer connected by the structure of isolated [PO4], [BO3], [VO2] and [VO3] groups, and that there are a little bridge oxygen bonds such as B-O-B, P-O-P, P-O-V, P-O-B in the inter to connect the layers.