【摘要】：本文選擇熔融-晶化法分別制備了主晶相為Ba_3(VO_4)_2和Sr6V2O11的微晶玻璃樣品。對配方組成進(jìn)行優(yōu)化,確定了最佳配比,并研究兩種玻璃樣品的熱處理、析晶情況、微觀形貌、熱學(xué)性質(zhì)及力學(xué)性質(zhì)。通過XRD、膨脹曲線、硬度等分析方法,分析了SiO_2/B_2O_3對含Ba_3(VO_4)_2微晶玻璃析晶和性能的影響。分析表明:Ba_3(VO_4)_2微晶玻璃的最佳熱處理制度為晶化溫度540℃,保溫2 h,轉(zhuǎn)變溫度Tg和軟化溫度Tf分別為320℃、500℃,熱膨脹系數(shù)為17.81×10-6℃-1,硬度為388 HV,已達(dá)到封接材料的要求,可用來代替?zhèn)鹘y(tǒng)含鉛封接材料;Sr6V2O11微晶玻璃采用兩步熱處理制度:核化溫度520℃、保溫1 h,晶化溫度600℃、保溫2 h,其Tg和Tf分別為375℃、520℃,熱膨脹系數(shù)為13.2×10-6℃-1,硬度值為437 HV,已達(dá)到封接材料的要求。隨著SiO_2/B_2O_3的增加,樣品的析晶程度發(fā)生變化,樣品的熱膨脹系數(shù)降低,硬度值增大,當(dāng)SiO_2/B_2O_3的比例為4:1時,晶相種類發(fā)生改變。
[Abstract]:In this paper, Ba_3 (VO_4) _ 2 and Sr6V2O11 glass-ceramics were prepared by melt-crystallization method, respectively. The composition of the formula was optimized and the optimum proportion was determined. The heat treatment, crystallization, micromorphology, thermal properties and mechanical properties of the two kinds of glass samples were studied. The effect of SiO_2/B_2O_3 on crystallization and properties of glass-ceramics containing Ba_3 (VO_4) _ 2 was analyzed by means of XRD, expansion curve and hardness analysis. The results show that the optimum heat treatment conditions of Ba_3 (VO_4) _ 2 glass-ceramics are as follows: crystallization temperature 540 鈩，

本文編號：2387995