摘要
以石英微粉为内核,六水硝酸亚铈(Ce(NO3)3.6H2O)为铈源,以碳铵(NH4HCO3)为沉淀剂,采用化学沉淀法制备出了包覆型的CeO2@SiO2复合粉体。利用热分析仪(TG/DSC)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、傅里叶红外分析仪(IR)等对所制备复合粉体的成分、晶相结构、形貌、粒径分布及团聚状况进行了表征。将制备的样品对K9玻璃进行了抛光实验,用原子力显微镜观察K9玻璃抛光前后的微观形貌,并测量表面粗糙度。结果表明,所制备的CeO2@SiO2复合颗粒具有明显的包覆结构,纳米CeO2主要以物理吸附的方式包覆在微米石英微粉颗粒表面,AFM测量结果表明,抛光后K9玻璃表面划痕得到明显改善,在10μm×10μm范围内表面粗糙度RMS值由54.217 nm降至1.073 nm。
The coated CeO2@ SiO2 composite abrasive was prepared by chemical precipitation method, using silica powder, cerium nitrate and ammonium bicarbonate as raw materials. Thermo gravimetry - differential sanning calotimetry （ TG/ DSC）, X - ray diffraction （ XRD ）, scanning electron microscope （ SEM ）, energy diffraction spectrum （ EDS ）, infrared （ IR ） spectra were used to characterize the CeO2@ SiO2 composite particle. The slurry prepared with the composite abrasive was used to polish K9 glass. Themorphology differences before and after polishing were investigated with atomic force microscope （AFM） ,and the RMS values was obtained. The results showed that the CeO2 coated SiO2 particles were successfully prepared, nano - CeO2 was absorbed in the surface of silica powdermainly with Vanderwals force. The surface scratches of the glass were less after polishing,and the RMS was reduced from 54. 217nm to 1. 073nm.
出处
《稀土》
EI
CAS
CSCD
北大核心
2013年第1期53-58,共6页
Chinese Rare Earths
关键词
包覆
氧化铈
石英微粉
制备
抛光
coating
cerium oxide
s/I/ca powder
preparation
polishing
