研究目的
To prepare spherical silica particles with controllable size using the sol-gel method and investigate the effects of reaction temperature, ammonia amount, and TEOS dosage on the size and morphology of the particles.
研究成果
Spherical silica particles were successfully prepared with controllable size. The morphology remained spherical regardless of variations in temperature, ammonia, or TEOS. Optimal conditions for maximum particle size (0.6 μm) were at 30°C hydrolysis temperature and 20 ml ammonia dosage. TEOS dosage increased the amount of silica but caused particle size to first increase and then decrease. The findings provide insights for tuning silica particle properties in various applications.
研究不足
The study is limited to specific ranges of temperature, ammonia, and TEOS dosages; other factors like stirring speed or different catalysts were not explored. The method may not be scalable for industrial applications without further optimization.
1：Experimental Design and Method Selection:
The sol-gel method was employed using TEOS as a precursor, ethanol as a solvent, and ammonia as a catalyst to prepare spherical silica particles. The design involved varying hydrolysis temperature, ammonia dosage, and TEOS dosage to study their effects.
2：Sample Selection and Data Sources:
α-SiC substrate (D50=16.5 μm) was used as a base, mixed with anhydrous ethanol to form a reaction mother liquor. Samples were prepared under different conditions and characterized.
3：5 μm) was used as a base, mixed with anhydrous ethanol to form a reaction mother liquor. Samples were prepared under different conditions and characterized.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Reagents included TEOS (A.R.), absolute ethanol (A.R.), ammonia spirit (A.R.), and α-SiC (Tech). Instruments included an intelligent digital display thermostatic bath, magnetic stirrer, circulating water vacuum pump, electric thermostatic drying oven, and electronic balance.
4：Experimental Procedures and Operational Workflow:
The α-SiC substrate was added to ethanol, ultrasonicated for 30 min, heated in a thermostatic bath, and mixed with ethanol-water mixture, ammonia, and TEOS-ethanol mixture. After stirring for 2 hours, the mixture was filtered, washed, and dried at 105°C for 24 hours.
5：Data Analysis Methods:
Particle size was measured using a laser particle size analyzer (MASTERSIZER 3000), and microstructures were observed with a scanning electron microscope (JSM-5510LV).
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
