%0 Journal Article
%T UnseededInductionPeriodandPrimaryNucleationofLithiumCarbonate
%A 孙玉柱
%A 宋兴福
%A 汪瑾
%A 罗妍
%A 于建国
%J 过程工程学报
%D 2009
%X Asetoflaserapparatuswasusedtostudyinductionperiodandprimarynucleationoflithiumcarbonateinreactivecrystallization.Theresultsshowthatinductionperiodincreaseswiththedecreaseofsupersaturationdegreeandtemperature.Magneticfieldhasnearlynoimpactonit,whiletheuseofultrasoundreducesitobviously.Theimpactsofsomeimpuritiesandadditivesonprimarynucleationwereinvestigated.ItisfoundthatthepresenceofNa2SO4,NH4Cl,(NH4)2SO4andEDTAdisodiumprolongsinductionperiod,whereasKCl,NaCl,NaBrandCH4N2Ocandecreaseit.Manyimportantparametersofprimarynucleationarealsoobtained,astemperaturegoesupfrom283to313K,interfacialtensiondecreasesfrom44.8to41.5mJ/m2,contactanglevariesfrom82.9oto88.7o,nucleationorderisbetween5.0and5.4,surfaceentropyfactorsareallabove5,suggestingthatthegrowthmechanismisaspiralgrowth.Besides,boththehomogeneousandheterogeneousprimarynucleationsweremonitoredwithon-linefocusedbeamreflectancemeasurement.
%K lithiumcarbonate
%K primarynucleation
%K reactivecrystallization
%K inductionperiod
%K focusedbeamreflectancemeasurement
%U http://www.jproeng.com/qikan/Cpaper/zhaiyao.asp?bsid=14937