机械力化学法制备煅烧硅藻土/α-Fe_2O_3复合粉体  

Mechanochemical preparation of calcined diatomite/α-Fe2O3 composite particle materials

作　　者：薛强[1] 杜高翔[1,2] 廖立兵[1] 丁浩[1] 赵朝兴[1] 

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083 [2]河北瀛都复合材料有限公司,邢台054804

出　　处：《北京科技大学学报》2011年第5期614-618,共5页Journal of University of Science and Technology Beijing

基　　金：中国博士后基金特别资助项目(No.200902128)

摘　　要：以煅烧硅藻土和α-Fe_2O_3为原料,利用机械力化学法在湿法研磨体系中制备了煅烧硅藻土/α-Fe_2O_3复合粉体(简称CD/α-F).通过扫描电镜、能谱分析、遮盖力及吸油量测试表征了复合粉体的颗粒形貌和颜料性能,并利用X射线衍射和傅氏转换红外线光谱分析了复合颗粒的反应机理.结果表明,机械力化学作用促使煅烧硅藻土与α-Fe_2O_3颗粒表面进一步羟基化,从而促进两者间发生羟基脱水缩合作用并形成了以弱作用力为连接键的Si…O…Fe形式的键合.在实验设定条件下制得了颜料性能与纯α-Fe_2O_3相近的核--壳型CD/α-F复合粉体.Calcined diatomite/α-Fe_2O_3 composite particle materials （CD/α-F） were prepared with calcined diatomite and α-Fe_2O_3 as raw materials by a mechanochemical method in the system of wet grinding. Scanning electron microscopy, energy dispersive spectrometry, hiding power and oil absorption measurements were used to characterize the morphologies and pigment properties of CD/α-F. The reaction mechanism of the composite particles was analyzed by X-ray diffraction and Fourier transform infrared spectroscopy. It is shown that mechanochemical effect enhances the particle surfaces of calcined diatomite and α-Fe_2O_3 to form hydroxide radicals further, thus promotes dehydration-condensation reactions between hydroxide radicals from the two raw materials and then Si…O…Fe bonds form with weak linking forces. Moreover, the core-shell CD/α-F composite powder has similar pigment properties to pure α-Fe_2O_3 in experimental conditions desired.

关 键 词：复合材料 粉体 硅藻土 氧化铁 颜料 机械力化学法 

分 类 号：TQ050.4[化学工程]