Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, People's Republic of China.
MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, People's Republic of China.
Environ Sci Pollut Res Int. 2019 Aug;26(22):22264-22272. doi: 10.1007/s11356-019-05573-5. Epub 2019 May 31.
The use of modified fly ash for preparing porous sound-absorbing materials and the optimum conditions of fly ash modification were studied. The effects of sintering temperature, sintering time, forming pressure, and other experimental conditions on porous sound-absorbing materials were also investigated. Results showed that the average volume density of the finished product was 0.93 g/cm, the compressive strength was approximately 1.2 MPa, and the average porosity was nearly 60%. The average sound absorption coefficient of the sample in a low-frequency band was approximately 0.353, and the overall average sound absorption coefficient was nearly 0.458. The optimal preparation conditions were as follows: sintering temperature was 1100 °C, sintering time was 5 h, and molding pressure was 2 MPa.
研究了利用改性粉煤灰制备多孔吸声材料及粉煤灰改性的最佳条件。还研究了烧结温度、烧结时间、成型压力等实验条件对多孔吸声材料的影响。结果表明，成品的平均体积密度为 0.93 g/cm，抗压强度约为 1.2 MPa，平均孔隙率接近 60%。样品在低频带的平均吸声系数约为 0.353，整体平均吸声系数接近 0.458。最佳制备条件为：烧结温度 1100°C，烧结时间 5 h，成型压力 2 MPa。
