研究目的
To produce silica from an agricultural waste, rice husks ash (RHA), and study its characteristics, including the effects of different heating temperatures, times, and acid treatments on silica extraction, and investigate its microwave properties after sintering.
研究成果
The results presented in this work show the existing phases of crystoballite at microwave sintered samples at 1100oC which is not shown in conventional sintering. Preliminary experiment for reflection losses of silica alumina composite show that there are relation between degree of crystallinity and their reflection loss.
研究不足
The study focused on the characterization of silica xerogel from rice husk ash and its microwave properties after sintering. The potential limitations could include the scalability of the process and the optimization of sintering conditions for industrial applications.
1：Experimental Design and Method Selection:
The study involved the preparation of silica from rice husk ash (RHA) and its characterization. Different heating temperatures, times, and acid treatments were studied for silica extraction. The composite was characterized, and its microwave properties were investigated after sintering from 400 to 1200 oC.
2：Sample Selection and Data Sources:
Rice husk ash (RHA) was used as the silica source. Alumina (Al2O3) was obtained from Sumitomo AES-11C with purity ≈ 99.8%.
3：8%.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Silica xerogel from RHA, alumina (Al2O3), microwave sintering equipment, XRD and SEM for characterization, and a Vector Network Analyzer for studying microwave properties.
4：Experimental Procedures and Operational Workflow:
The silica-Al2O3 composites were prepared from silica of the RHA with the maximum silica content and Al2O3 powder. They were prepared by using different levels of silica content and thickness, molded into rectangular slabs, and sintered at temperatures up to 1200 oC using microwave.
5：Data Analysis Methods:
The composites were characterized using XRD and SEM. The relationship between their microstructure, mechanical, porous and microwave properties with silica content, thickness, and sintering temperature was studied.
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
