用正交设计方法,系统研究了影响双硅铝(potassium type poly-sialate-siloxo,K-PSS)型地聚合物合成的3个关键因素:n(SiO2)/n(Al2O3),n(K2O)/n(Al2O3)和n(H2O)/n(K2O)。根据抗压实验结果和红外光谱,从宏观和微观两个角度,定量分析每个因...用正交设计方法,系统研究了影响双硅铝(potassium type poly-sialate-siloxo,K-PSS)型地聚合物合成的3个关键因素:n(SiO2)/n(Al2O3),n(K2O)/n(Al2O3)和n(H2O)/n(K2O)。根据抗压实验结果和红外光谱,从宏观和微观两个角度,定量分析每个因素的影响规律,优选出K-PSS型地聚合物的最佳配合比。用X射线衍射分析和魔角自旋的核磁共振技术对由最佳配合比合成的地聚合物硬化体的结构特征和主要组成元素Si及Al的配位状态进行研究,发现地聚合物在合成过程中[SiO4]对应的1086cm-1红外振动峰向低波数偏移至1033cm-1,6配位Al也转化为4配位,最终无定形产物中Al元素主要以4配位态形式存在,并且与[SiO4]键接成空间三维网状结构,不存在孤立状、组群状的低分子量的结构单元,而Si与Al的键接主要以SiQ4(4Al)和SiQ4(2Al)形式存在。展开更多
O'-sialon-ZrO2 composite based on the cheap commercial available zircon and silicon as raw materials can be achieved by using reac-tion nitridation method,More attention was given to the nitriding process and the ...O'-sialon-ZrO2 composite based on the cheap commercial available zircon and silicon as raw materials can be achieved by using reac-tion nitridation method,More attention was given to the nitriding process and the effect of additives on it .The experimental results show that there are two nitridation paths:one is the direct nitridation of silicon powder and the other is through the reaction between the medi-um compound ZrSi2 and the nitrogen.The effects of addition of calcia and the incorpora-tion of BN on the nitriding reaction were also investigated,the primitive experimental results demonstrated that both of calcia and BN could deteriorate the nitriding degree.展开更多
Slag corrosion resistance of β－Sialon and β－Sialon-Al2O3 composites has been studied .The effects of FeO content and temperature on corrosion rate have been investi-gated by mens of dip method(static and self-r...Slag corrosion resistance of β－Sialon and β－Sialon-Al2O3 composites has been studied .The effects of FeO content and temperature on corrosion rate have been investi-gated by mens of dip method(static and self-rotating).The corrosion process and microstructural analysis.It is shown that FeO preferentially attacks β-Sialon in the composite and the protruded corundum grains would gradualy fall off into the slag.展开更多
文摘用正交设计方法,系统研究了影响双硅铝(potassium type poly-sialate-siloxo,K-PSS)型地聚合物合成的3个关键因素:n(SiO2)/n(Al2O3),n(K2O)/n(Al2O3)和n(H2O)/n(K2O)。根据抗压实验结果和红外光谱,从宏观和微观两个角度,定量分析每个因素的影响规律,优选出K-PSS型地聚合物的最佳配合比。用X射线衍射分析和魔角自旋的核磁共振技术对由最佳配合比合成的地聚合物硬化体的结构特征和主要组成元素Si及Al的配位状态进行研究,发现地聚合物在合成过程中[SiO4]对应的1086cm-1红外振动峰向低波数偏移至1033cm-1,6配位Al也转化为4配位,最终无定形产物中Al元素主要以4配位态形式存在,并且与[SiO4]键接成空间三维网状结构,不存在孤立状、组群状的低分子量的结构单元,而Si与Al的键接主要以SiQ4(4Al)和SiQ4(2Al)形式存在。
文摘O'-sialon-ZrO2 composite based on the cheap commercial available zircon and silicon as raw materials can be achieved by using reac-tion nitridation method,More attention was given to the nitriding process and the effect of additives on it .The experimental results show that there are two nitridation paths:one is the direct nitridation of silicon powder and the other is through the reaction between the medi-um compound ZrSi2 and the nitrogen.The effects of addition of calcia and the incorpora-tion of BN on the nitriding reaction were also investigated,the primitive experimental results demonstrated that both of calcia and BN could deteriorate the nitriding degree.
文摘Slag corrosion resistance of β－Sialon and β－Sialon-Al2O3 composites has been studied .The effects of FeO content and temperature on corrosion rate have been investi-gated by mens of dip method(static and self-rotating).The corrosion process and microstructural analysis.It is shown that FeO preferentially attacks β-Sialon in the composite and the protruded corundum grains would gradualy fall off into the slag.
