摘要
通过在高岭土中引入质量分数为 1 %～ 5 %的钒以后 ,在 70 0℃左右的较低温度下观察到莫来石相的生成 ,并结合酸、碱抽提反应过程制得较纯的莫来石 .进一步研究了低温莫来石点阵参数的测定方法 ,发现低温钒 -莫来石的晶胞体积比常规的高温莫来石大 ,表明钒进入了莫来石的骨架结构 .另外 ,低温莫来石的形成动力学可表述为钒
Vanadium mullite had been surprisingly observed in the phase transition of kaolin in the presence 1%-5% vanadium at about 700 ℃ ,and quite a pure vanadium mullite could be obtained through the process of acid & base leaching reaction and separation. In addition, unit cell parameters of various mullites were especially determined by XRD and the unit cell volume of vanadium mullite formed at a low temperature was found to be greater than that of the common mullite, which could be deduced that vanadium incorporated into the mullite framework. Furthermore, the reaction process of vanadium mullite formation could be expressed as low melting vanadium kaolin eutectic transition.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第4期698-702,共5页
Chemical Journal of Chinese Universities
