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采用溶胶-凝胶法制备了3种不同钡锶物质的量比的Ba1-xSrxAl2Si2O8(BSAS)体系粉体材料,其钡、锶物质的量比分别为1∶0、0.75∶0.25、0∶1。将烧结得到的BSAS块体材料表面喷涂(8.5±0.2)mg/cm2的Na2SO4后,置于1000℃空气环境中进行熔盐腐蚀实验,研究其抗熔盐腐蚀性能。根据样品质量随腐蚀时间的变化,结合X射线衍射(XRD)和扫描电镜形貌分析(SEM)等结果,揭示其抗熔盐腐蚀机理。结果表明,B0.75S0.25AS腐蚀100h后质量变化最小,XRD分析其成分未发生明显变化,说明B0.75S0.25AS在1000℃时的抗熔盐腐蚀性能优于其它物质的量比的BSAS材料。
The Ba1-xSrxAl2Si2O8 (BSAS) system powders with different molar ratios of barium and strontium were prepared by sol-gel method. The molar ratio of barium and strontium was 1: 0, 0.75: 0.25 and 0: . After the surface of BSAS block material was sprayed with Na2SO4 (8.5 ± 0.2) mg / cm2, the molten salt corrosion test was carried out in air atmosphere at 1000 ℃ to study its anti-molten salt corrosion resistance. According to the change of the sample quality with the etching time, combined with the results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) to reveal the anti-molten salt corrosion mechanism. The results showed that the mass change of B0.75S0.25AS after 100h corrosion was the smallest, and the composition of XRD analysis did not change significantly. It is indicated that the corrosion resistance of B0.75S0.25AS at 1000 ℃ is better than that of other materials .