摘要
采用机械球磨法,以磷酸二氢铝和磷酸为改性剂,制备了抗水解氮化铝粉末,并研究了改性氮化铝粉末在水基球磨过程中的稳定性。通过X射线衍射(XRD)和氮含量测定对改性前后氮化铝粉末进行了表征,并讨论了磷酸二氢铝和磷酸的加入量、球磨时间和球料质量比对改性效果的影响。结果表明:在磷酸二氢铝和磷酸的添加质量分别为氮化铝质量的1%和2.5%、球磨时间为2 h、球料质量比为3∶1的条件下,氮化铝的改性效果最佳;改性氮化铝粉末在60℃水中浸泡24 h后,其氮质量分数为32.97%,且其X射线衍射谱图中未发现氢氧化铝相,说明其抗水解能力得到显著提高;改性氮化铝粉末在水中高速球磨16 h后,其氮质量分数约为32%,氮化铝悬浮液的pH约为6,说明其在水基球磨过程中具有较好的稳定性。
Anti-hydrolysis aluminum nitride （AlN） powder was prepared by mechanical ball milling method with aluminum dihydrogen phosphate and phosphoric acid as modifiers, and stability of modified AlN powder in aqueous ball milling was studied. AlN powder before and after being modified was characterized by XRD and determination of nitrogen content. Factors,such as amount of modifiers,modifying time,and mass ratio of ball to powder influencing the modification effect were also discussed. Results showed that when mass ratio of ball to powder was 3 ： 1, modifying time was 2 h, and amounts of H3PO4 and Al（ H2PO4）3 were 2.5% and 1% of mass of AIN respectively, the best modification effect was gained;mass fraction of nitrogen was found to be 32.97% and there was no obvious AI（OH）3 generation in XRD patterns when modified AlN powder was immersed in water at 60 ℃ for 24 b, thus it proved that the anti-hydrolysis ability was significantly increased;mass fraction of nitrogen was about 32% and pH of the suspension was about 6 when modified AlN powder was milled for 16 h under high energy, which confirmed it also kept higher stability in process of high energy aqueous ball milling.
出处
《无机盐工业》
CAS
北大核心
2010年第3期30-33,共4页
Inorganic Chemicals Industry
关键词
氮化铝
机械球磨
磷酸二氢铝
磷酸
aluminum nitride
mechanical ball milling
aluminum dihydrogen phosphate
phosphoric acid
