摘要
利用沉淀法对BaO-TiO2-B2O3-SiO2体系LTCC粉体颗粒进行氧化铝包覆以阻断钡离子的溶出通道。分别使用结晶氯化铝和异丙醇铝作为包覆前驱物材料,通过对比两种前驱物的包覆效果,发现使用异丙醇铝前驱体的包覆效果更佳;随着包覆的氧化铝含量增大,包覆效果越好;使用异丙醇铝作前驱体,6%(质量分数,下同)包覆足以阻断钡离子溶出,包覆粉体在水中经过6h搅拌,钡离子无析出。
BaO-TiO2-B2O3-SiO2 system LTCC powders were coated with alumina using precipitation process to prevent from Ba^2＋ dissolving in water. The alumina coatings were made from aluminum chloride or aluminum isopropoxide precursor solutions. Based on the research results of type and quantity of precursor, the quality of powders coating was optimized. The result shows that compared with aluminum chloride, using aluminum isopropoxide as precursor is more efficient. After calcinations, the alumina coating is strongly adhered to the substrate surface even after stirred in water for 6 h. With the increase of precursor, little Ba^2＋ dissolve in water. The optimum quantity of precursor is about 6wt%.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第A01期14-16,共3页
Rare Metal Materials and Engineering
基金
清华大学新型陶瓷与精细工艺国家重点实验室开放基金资助项目
