碳热还原法制备球形SiC微粉.pdfVIP

26 6 硅 酸 盐 通 报 V o l. 26 N o. 6 2007 12 BU LLET IN OF THE CH IN ESE CERAM IC SOC IETY D ecem ber 2007 SiC 王 福 曹文斌 孙加林 何荣亮 ( 100083) : S iC 800 6 /m in S iO2 800 15 /m in 1700 1h S iC 1m : SiC; ; : TQ 163 : A : 2007) P reparat ion of Spher ical S iC Pow ders by C arbotherm al R edu ction WAN G Fu, CA O W enbin, S UN J ialin, H E R ong liang ( D epartm ent of Inorgan ic N onm etall ic M aterials School ofM aterials Science and Engin eering U n ivers ity of S cien ce and T echnology Beij ing B eijing 100083 Ch in a) Abs tract: S iC pow dersw ere synthesized by redu cing silica w ith saccharose in a flow argon atmosphere a t 1500 1600 and 1700 respectively. During the process o f the pyrolysis o f saccharose the spherica l carbon p art icles w ere obta ined w ith the heating rate of 6 /m in from room tem p era ture to 800 . T he reaction system s can be com p letely tran sfo rm ed in to S iC at 1700 fo r 1h. T he syn thesized products are m ain ly com posed o f spherica l S iC p art ic les w ith the size of about 1m. The increased reaction tem perature and ex tended ho ld ing tmi e w ill g reatly accelerate the react ion rate and increase the product ion of SiC. K ey w ord s: S iC pow der; precursors; carbotherm a l redu ction 1 引 言 S iC [ 1 2 ] S iC S iC SiC S iC[ 3 4 ] SiC [ 5] SiC : ( : ( 1975) . S iC . : Em ail: w bcao@ m at