SiO<sub>2</sub>空心微球的制备与表征

SiO₂空心微球的制备与表征

基金项目:

天津市应用基础研究计划面上基金项目(06YFJMJC02500)

详细信息

School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

摘要: 以自制的微米级碳酸钙颗粒为模板,正硅酸乙酯为硅源,通过溶胶-凝胶方法合成出CaCO₃/SiO₂核壳结构;随后通过高温煅烧、酸浸和干燥处理,制备出圆形度高、分散性好、结构完整的微米级SiO₂空心球。并利用SEM、XRD、FTIR、TG和压缩实验等方法对空心微球的形貌、结构和抗压强度进行了分析和测定。SiO₂空心微球的粒径为2~5μm,壳层厚度为0.42~0.85μm,比表面积为554.01m²/g,最可几孔径为1.7nm,抗压强度在20~30MPa之间。
- SiO₂空心微球 /
- 碳酸钙模板 /
- 合成 /
- 表征 /
- 抗压强度
Abstract: CaCO₃/SiO₂ core-shell structure was prepared by sol-gel route and using calcium carbonate microparticles as core templates and TEOS as silica source,and then the hollow silica microspheres were synthesized after calcination,dissolution and washing process.The surface morphology,structure and compressive strength of hollow silica microspheres were examined and determined by using SEM,XRD,FTIR,TG and compression tester.The results show that the as-synthesized hollow silica microspheres are uniform spherical particles with good dispersion,and have a diameter of 2~5 μm,wall thickness of 0.42~0.85 μm,specific surface area of 554.01 m²/g,pore diameter around 1.7 nm and compressive strength of 20~30 MPa.
- Hollow silica microsphere /
- CaCO₃ template /
- Synthesis /
- Characterization /
- Compressive strength