%0 Journal Article
%T Effect of pH Value on Growth of Desulphurization Gypsum Whiskers<br>pH值对脱硫石膏晶须生长行为的影响
%A DENG Zhi-yin
%A YUAN Yi-yi
%A SUN Jun
%A SHI Pei-yang
%A JIANG Mao-fa
%A <br>邓志银
%A 袁义义
%A 孙骏
%A 史培阳
%A 姜茂发
%J 过程工程学报
%D 2009
%I 
%X Using desulphurization gypsum as raw material, hydrothermal method was applied to prepare calcium sulfate whiskers and using conductivity, SEM, XRD and high resolution microscope as analysis methods, the growth principle of calcium sulfate under different pH values was explored. The results reveal that with the increase of pH value, the aspect ratio of calcium sulfate whiskers firstly increased and then decreased. When the pH value was 5, the whisker diameter was 1～4 μm, the average length 218.67 μm and the aspect ratio reached the maximum value of 82.57. The change of pH value exerted a direct influence on the existence of impurities, with the increase of pH, SiO_2 within the impurities gradually transformed into CaSiO_3, and the equilibrium of ions in the solution changed and hence affected the growth tendency of the whiskers in a specific direction.
%K pH
%K desulphurization gypsum
%K calcium sulfate whiskers
%K pH value
%K aspect ratio
%K conductivity<br>脱硫石膏
%K CaSO_4晶须
%K 长径比
%K 电导率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=32D82BF20FE20F35F5AD54AD27621319&yid=DE12191FBD62783C&vid=9CF7A0430CBB2DFD&iid=B31275AF3241DB2D&sid=4442BFF895478018&eid=D542ADE6529F4059&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=1&reference_num=15