溶胶 凝胶技术合成了SiO2 PMMA无机 有机复合材料的均匀体系。用小角X 射线衍射、X 射线能谱仪对所合成的SiO2 PMMA无机 有机复合材料体系进行了粒度的测量。给出了在该种复合材料中 ,无机与有机成分的含量相对变化时 ,体系的粒度并不发生显著变化 ,该体系是有机相被包覆在无机相中所形成的网络等结论 A homogeneous system of SiO2-PMMA inorganic-organic composite was synthesized by sol-gel technique. The particle size of the synthesized SiO2 PMMA inorganic-organic composite system was measured by small-angle X-ray diffraction and X-ray energy dispersive spectrometer. In this kind of composite material, the particle size of the system does not change significantly when the content of inorganic and organic components changes relatively. This system is the conclusion that the organic phase is coated in the network formed by inorganic phase, etc.