纳米AlN对低温陶瓷结合剂性能的影响

Effect of nano-AlN on performances of low temperature vitrified bond

本文探讨了纳米AlN对Na2O-B2O3-SiO2硼硅酸盐玻璃体系陶瓷结合剂性能的影响。利用差热分析仪、X-射线衍射仪等仪器,在不同烧成温度及气氛条件下,测试陶瓷结合剂的热性能、XRD、耐火度、抗折强度,以及线膨胀系数等性能,结果表明:在氩气气氛下纳米AlN会促使陶瓷结合剂中产生析晶;添加纳米AlN质量分数w为6%时,结合剂的烧结温度范围增加30℃;氩气气氛下,烧成温度为710℃,添加纳米AlN质量分数w为6%时,结合剂的抗折强度最大,达到35.64 MPa;纳米AlN加入使结合剂的线膨胀系数下降,添加质量分数w(AlN)为6%时,结合剂的平均线膨胀系数最小为4.99×10-6℃-1。

In this paper, the effects of nano-AlN on low temperature vitrified bond of Na2O-B2O3-SiO2 borosilicate glass system was discussed. By means of differential thermal analyzer and X-ray diffractometer, the thermal properties, XRD , bending strength, and linear expansion coefficient, of the vitrified bond under different sintering temperature and atmosphere were tested and analysed. The results showed that, under Ar atmosphere nano-AlN will promote crystallization in the vitrified bond; when the addition of Nano-A1N is 6%, the sintering temperature range is widened by 30 ℃. Under Ar atmosphere and the firing temperature of 710 ℃, when the content of Nano-AlN is about 6% , the vitrified bond reaches its maximum bending strength which is 35.64 MPa ; The coefficient of linear expansion of vitrified bond decrease owing to adding of nano- AIN. When the content of nano-AlN is about 6%, the average linear expansion coefficient gets minimum , which is 4.99×10^-6℃^-1.