Adding middle grade sintered magnesia powder can enlarge the line ratio and porosity after high temperature treatment.

中档镁砂粉的添加使浇注料高温处理后的线变化率增大和气孔率增加。

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By pressing the magnesia powder into disks directly and correcting the matrix effect, a method for X-ray fluorescence analysis of magnesia was established.

采用粉末样品直接压片法，通过基体校正等手段，建立了优质镁砂X射线荧光分析方法。

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This paper has summarized the Sol-Gel technologies of preparation for nanometer magnesia powder in the recent years, and the development of this method was discussed in details.

对近年来以溶胶-凝胶法制备纳米氧化镁粉体的几种工艺进行了总结比较，并展望了该法的发展前景。

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