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�������պ����ѧѧ�� 2006, Vol. 32 Issue (06) :662-666    DOI:
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Preparation of magnesium hydroxide flame retardant via MgCl2-NH3·H2O synthesis and hydrothermal modification treatment methods
Li Zhiqiang*
National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ Ϊ�˽��������þ�;ۺ���֮��IJ���������, �԰��ϳɷ�-ˮ�ȸ��Դ���2�����Ʊ��߷�ɢ������þ��ȼ���������о�,�����˳��ºϳ��¶ȡ�ˮ�ȸ����¶Ⱥ�ˮ�ȸ���ʱ����Ʊ����͡��ͱȱ����������þ��ȼ����Ӱ��.�������,����ˮ�ȸ��Դ���ı���������þ���������ϰ��,��������ò���������ֲ����ȡ���ɢ�����õ�������þ����Ƭ״����.����ͨ������Ȼ�þŨ�ȺͰ�ˮ����1��,̽���˳��ºϳɷ�Ӧ��ת����,��ΪӦ���ڷ�Ӧԭ�ϵȵ�����Ѱ�����ת���ʵĿ��з���.
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Abstract�� In order to solve the problem that the Mg(OH)2 is incompatible with the polymer, the two steps reaction of high dispersive Mg(OH)2 preparation, synthetic reaction and hydrothermal modification treatment, was studied. The effect of the synthetic reaction temperature, hydrothermal modification temperature and time was investigated for preparation of Mg(OH)2 flame retardant with large crystalline structure and small specific surface area. The experimental results indicate that the growth direction of Mg(OH)2 crystal is changed and the regular hexagonal plates of Mg(OH)2 with uniform particle size and high dispersion characteristic are formed after the hydrothermal modification treatment. With the increasing MgCl2 concentration and/or feeding excessive NH3·H2O, percent conversion rates of raw materials are discussed. The results show some new technologies should be studied for increasing percent conversion of raw materials when synthetic reaction is equivalent.
Keywords�� flame retardant magnesium hydroxide   synthetic reaction   hydrothermal modification treatment   morphology   specific surface area (BET)     
Received 2005-06-08;
About author: ��־ǿ(1970-),��,ɽ��������,������, lizhiqiang@buaa.edu.cn.
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��־ǿ.���ϳ�-ˮ�ȸ��Է��Ʊ�������þ��ȼ��[J]  �������պ����ѧѧ��, 2006,V32(06): 662-666
Li Zhiqiang.Preparation of magnesium hydroxide flame retardant via MgCl2-NH3·H2O synthesis and hydrothermal modification treatment methods[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(06): 662-666
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2006/V32/I06/662
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