Journal of University of Science and Technology Beijing. 2014, (04) Core

Preparation of potassium titanate nanowhiskers from electric furnace molten slag with titaniumChinese Full Text

YU Hai-yang;WANG Yan-fei;ZHANG Le-hao;LIU Jing;LIU Lu-lu;ZHANG Mei;GUO Min;State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing;

Abstract: Potassium titanate（ K2Ti6O13） nanowhiskers were successfully prepared from electric furnace molten slag with titanium by a hydrothermal method with alkaline solution,then refluxing in an acid medium and finally calcination. The effects of titaniumto-potassium mole ratio,calcination temperature,reaction time and water immersion on the crystal phase and morphology of as-prepared products during the calcination process were investigated in detail by scanning electron microscopy,transmission electron microscopy, X-ray diffraction and X-ray fluorescence. It is found that one-dimensional single crystalline metatitanic acid nanorods with uniform size are obtained when the hydrothermal reaction is controlled at about 200 ℃ for 24 h in a 12 mol·L-1potassium hydroxide solution. The purity,the crystallinity degree and the aspect ratio of formed potassium titanate whiskers are improved with increasing titaniumto-potassium mole ratio from 1. 50 to 1. 75,calcination temperature from 800 to 1100 ℃,and reaction time from 0. 5 to 7 h. The optimum conditions for preparing potassium titanate nanowhiskers are the titanium-to-potassium mole ratio of 1. 75,the calcination temperature of 1100 ℃,the reaction time of 5 h,and the water immersion time of 2 h.

Keywords：

slags; potassium titanate; nanowhiskers; hydrothermal synthesis; waste utilization;

DOI：
10.13374/j.issn1001-053x.2014.04.012
Series：
Subject：
Classification Code：
TQ131.13;TB383.1

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Preparation of potassium titanate nanowhiskers from electric furnace molten slag with titaniumChinese Full Text

YU Hai-yang;WANG Yan-fei;ZHANG Le-hao;LIU Jing;LIU Lu-lu;ZHANG Mei;GUO Min;State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing;

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