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| Effect ofraw material ratio on performances of α-SiO2 microporous ceramic emitter |
| ZHOU Wei1,WU Pute1,2*,ZHANG Lin2,YAO Chunping1,ZHAO Xiao1,CAI Yaohui1 |
| 1. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; 2. Institute of Water-saving Agriculture in Arid Areas of China, Yangling, Shaanxi 712100, China |
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Abstract The quartz sand was selected as the skeleton material, the carbon powder was used as the pore-forming agent, kaolin and albite were used as binders to prepare α-SiO2 microporous ceramic emitter. The effect of raw material ratio on the performance of porous ceramic emitter was studied, and the optimal ratio of porous ceramic emitter was obtained. The results show that the excessive content of quartz sand is likely to cause a decrease in material properties. With the carbon content increasing, the porosity of the porous ceramic gradually increases. The increasing in the content of albite and kaolin reduces the formation of the glass phase and contributes to the improvement of strength. The flow rate of the emitter increases as the working pressure increases. At the same working pressure, as the pore-forming agent content increases, the flow rate of the porous ceramic emitter increases. The permeability coefficient of porous ceramic emitters is a function of power as a function of porosity. When the mass ratio of quartz sand: carbon powder: kaolin and albite is 60∶15∶25, the α-SiO2 porous ceramic emitter exhibits excellent material and hydraulic performance, which can meet the field use requirements.
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Received: 21 October 2018
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