关键词: 偏钛酸;六钛酸钾;晶须;烧结法;长径比

Abstract: Potassium hexatitanate whiskers were prepared by sintering method using metatitanic acid and potassium carbonate as raw materials .The phase and morphology characteristics of the products were characterized by X-ray diffraction ( XRD) and field emission scanning electron microscopy ( SEM) .The results show that the molar ratio of n( TiO2 )/n( K2 O) has obvious effect on the phase of the product , the product is basically potassium hexatitanate as the molar ratio of n( TiO2 )/n( K2 O) is 3.5.The product composition has no obvious change as the calcinations temperature increases from 1050 ℃ to 1150 ℃. With the increase of calcinations time , the phase types of the product is less , the crystallinity of potassium hexatitanate is better .The calcinations temperature has little effect on the aspect ratio of potassium hexatitanate whisker .The aspect ratio of potassium hexatitanate whiskers can reach 100 when n ( TiO2 )/n( K2 O) molar ratio is 3.3.

Key words: metatitanic acid;potassium hexatitanate;whiskers;sintering method;aspect ratio