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Citation: WU Jian-Song, XIAO Ying-Kai, ZHANG Li, KUANG Wen-Hua, LIANG Hai-Qun, WU Kang-Di. Preparation of Magnesium Hydroxide Whisker[J]. Chinese Journal of Applied Chemistry, ;2008, 25(5): 529-533. shu

Preparation of Magnesium Hydroxide Whisker

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a Chemistry Institute of Zhanjiang Normal College, Zhanjiang 524048;
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b Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining;
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c Biology Institute of Zhanjiang Normal College, Zhanjiang

Corresponding author: WU Jian-Song,
Received Date: 8 August 2007
Available Online: 26 November 2007
Fund Project: 国家自然科学基金(40573013) (40573013)湛江市2007年科技攻关(2007C09018)资助项目 (2007C09018)

MgCl₂·6H₂O was used as raw material.Sodium hydroxide was used as precipitator.Factors influencing the formation of Mg(OH)₂ whisker,such as concentration ratio of MgCl₂·6H₂O to NaOH,reaction temperature,crystallization temperature,crystallization time,crystallization means were tested.Experimental results show that the preliminary and undergrown Mg(OH)₂ whisker can be obtained under the conditions of n(MgCl₂):n(NaOH)=1.20:1.92,reaction temperature T_m=86℃,crystallization temperature T_c=100℃,crystallization time 5.5 h.Under the same conditions,better whisker can be obtained when hydrothermal crystallization is used.On this foundation,a perfect Mg(OH)₂ whisker was achieved after the organic solvent was added into NaOH solution.The SEM reveals that the particle of Mg(OH)₂ has whisker form with fine dispersive capability and perfect crystal form,as well as high purity and uniform particle size.The whisker growth mechanism was preliminarily analyzed.
- magnesium hydroxide,
- whisker,
- hydrothermal,
- function material
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