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中文摘要：
为了提高镁质浇注料的耐用性，研究了Si3N4加入对镁质浇注料性能的影响。结果表明：Si3N4可以明显提高镁质浇注料的高温抗弯强度，但由于Si3N4在高温容易被氧化，使镁质浇注料的结构被破坏，降低其它方面的使用性能，在实际应用中，Si3N4加入量应控制在小于5％的范围内。
英文摘要：
To improve the good performance of magnesia castable, the effect of Si3N4 on the magnesia castable properties were studied. The results showed that Si3N4 could increase the HMOR of magnesia castable. But Si3N4 was easy oxidated in the high temperature condition, and this could create the structure damaging and drop the other properties of magnesia castable. In the practical application, the amount of SiaN4 should be less than 5%.
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