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中文摘要：
分别采用硅酸乙酯水解液和氯化钇溶液对硅基（SiO2-Al2O3）型芯试样进行强化处理。结果表明,经硅酸乙酯水解液强化后的试样在1550℃能迅速析出大量方石英,抑制了材料在高温下的粘性流动,型芯高温强度较未强化型芯提高了接近50%;经氯化钇溶液强化后的试样,在1550℃前材料的软化熔融严重,没有强度。
英文摘要：
The silica-based ceramic cores were strengthened by ethyl silicate hydrolysates and yttrium chloride solution.The results show that,the ceramic core samples strengthened by the hydrolysates of ethyl silicate can quickly generate much cristobalite at 1550 ℃,which can prohibite the viscous flow of the ceramic cores.The flexural strength is improved by nearly 50%.The ceramic core samples strengthened by the yttrium chloride solution are greatly softened,and almost has no bonding strength before 1500 ℃.
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