《Table 1:Orthogonal factors and levels》

《Table 1:Orthogonal factors and levels》   提示:宽带有限、当前游客访问压缩模式
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《Humidity-resistant inorganic binder for sand core making in foundry practice》


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The Fourier-transform infrared(FT-IR)spectra of the samples were obtained on an IRPrestige-21 infrared spectrometer.All the samples were placed in an oven at 40°C for 10 h to ensure the complete evaporation of the water.Then,the samples were ground into very fine powder,followed by being mixed with KBr.After that,the mixture was compressed into the pills for FT-IR analysis.