六钛酸钾晶体的正交试验

Orthogonal Experiment of Potassium Hexatitanate Crystal

采用KDC(Kneading-Drying-Calcination)法合成了六钛酸钾晶体。通过TG-DTA测试初步确定了六钛酸钾正交试验的煅烧温度范围,采用XRD和SEM测试分析了正交样品的物相组成和微观形貌。由正交试验的极差分析得出了煅烧温度、升温速率以及保温时间对六钛酸钾形貌的权重,煅烧温度影响最大,其次为升温速率、保温时间影响最小。当煅烧温度为1 100℃时,在800℃之后升温速率保持3℃/min,保温1h可获得形貌较理想的六钛酸钾晶须;当煅烧温度为900℃时,在700℃之后升温速率保持3℃/min,保温3h可获得形貌较理想的六钛酸钾颗粒。

Potassium hexatitanate crystal was synthesized by KDC(Kneading-Drying-Calcination)method.The calcinations temperature range of potassium hexatitanate orthogonal experiment was preliminarily determined by TG-DTA test,and the phase composition and micromorphology of orthogonal experiment samples were analyzed by XRD and SEM test.The weights of calcination temperature,heating rate and insulation time to the morphology of potassium hexatitanate were obtained by the range analysis of orthogonal experiment.Calcination temperature has the greatest impact to the morphology,followed by heating rate,insulation time minimum.Potassium hexatitanate whiskers with better relatively ideal morphology can be synthesized when calcination temperature is 1 100 ℃ and heating rate is 3 ℃/min after800 ℃and insulation for 1h.Potassium hexatitanate particles with better morphology is synthesized when the calcination temperature is 900 ℃ and heating rate is 3 ℃/min after 700 ℃ and insulation for 3h.