单质硅溶解法制备大粒径硅溶胶.pdf

314()Vol.31No.4

20108JournalofQingdaoUniversityofScienceandTechnology(NaturalSciencedition)Aug.2010

:2010)

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(,266042)

:考察常压状态和加压状态下单质硅溶解法制备硅溶胶的工艺条件,探索加压状

态下的大粒径硅溶胶的制备结果表:常压状态下,硅溶胶制备的较佳工艺为反应温度

80,反应时间8h,200mL蒸馏水中加入10g硅粉和03g氢氧化钠,所得硅溶胶粒径

在30nm左右;加压状态下,硅溶胶制备的较佳反应条件:压力2MPa,温度150,反应

时间8h,200mL蒸馏水中加入10g硅粉和03g氢氧化钠,可制得粒径在100nm以

上,单分散状态良好的大粒径硅溶胶

:单质硅;溶解法;大粒径硅溶胶

:TQ127.2:A

PreparationofSilicaSolofLargeParticleSizebySiliconDissolvingMethod

HUANGCaiia,LIZhenqiu,ZHANGYuanjing,LIJinghua,CAOChengyun

(CollegeofChemicalngineering,QingdaoUniversityofScienceandTechnology,Qingdao266042,China)

Abstract:Silicasolwaspreparedbysilicondissolutionmethodusingsiliconpowderand

waterasrawmaterialsunderatmosphericstateandpressurestate.Theresultsshowed

that,underatmosphericstate,theoptimumreactionconditionsweresiliconpowder10g,

sodiumhydroxide03g,water200mL,reactiontime8hat80.Underabovecondi

tions,theparticlesizeofobtainedsilicasolwasabout30nm.Whileundertheconditions

ofreactionpressure2MPaandtemperature150,theparticlesizeofobtainedsilicasol

waslargerthan100nmwithgoodmonodispersity.

Keywords:siliconpowder;dissolution;silicasoloflargeparticlesize

1958,,,

,,,

,,SiO2,

100nm50%