The potassium lithium titanate(K0. 8 Li0. 27 Ti1. 73 O4 ,KLTO)was synthesized by molten salt method with the molten salt of KCl and raw materials of Li2CO3、K2CO3 and TiO2. Then the platy potassium hexatitanate(K2Ti6O13,PPT)was prepared from the precursor of KLTO by controlled process(acid treatment,heat treatment,secondary calcination). The effect of controlled process on the crystal growth of plate-like K2 Ti6 O13 was characterized by X-ray diffraction with scanning electron microscopy,and the mecha-nism of reaction was studied preliminarily. The results indicate that controlled process plays a vital role in the composition and mor-phology of layered K2Ti6O13. The KLTO was treated with 2M HNO3 for 2 days,followed by the hydrothermal treatment at 150℃ for 12h,using 1. 5M KOH as the solvent. After calcined at 900℃ for 3h,the platy K2 Ti6 O13 with good anisotropy and uniform distribu-tion was obtained.%以K2 CO3、Li2 CO3和TiO2为原料,加入KCl为熔盐,采用熔盐法合成片状钛酸锂钾(K0.8 Li0.27 Ti1.73 O4,KLTO),并以KLTO为前驱体通过过程控制(酸处理、热处理、二次煅烧)制备出六钛酸钾片晶(K2 Ti6 O13).运用XRD和SEM研究了过程控制对K2 Ti6 O13片晶生长的影响,并对其反应机理进行初步的探讨.结果表明:过程控制对K2 Ti6 O13片晶的组成及形貌起到了关键性作用.先以2M HNO3对KLTO处理2天,再以1.5M KOH为溶剂,150℃水热处理12h,最后在900℃条件下,二次煅烧3h即可制得各向异性好、分布均匀的K2 Ti6 O13片晶.
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