本文介绍了应用X射线衍射仪测定矿山呼吸性粉尘中游离二氧化硅含量的基本原理、实验条件以及操作过程、方法步骤等。
Basic principle, experiment condition, operating process, method and steps of X-ray diffraction method to determine free silica content of respirable dust in mines are introduced in this paper.
介绍一种测定硅酸铝系列填料中吸湿水、结合水、二氧化硅、三氧化二铝、三氧化二铁及二氧化钛等成分的系统分析方法。
A systematically analytical method to determine the content of absorbed water, bounded water, SiO2, Al2O3, Fe2O3 and TiO2 in the aluminum silicate fillers was introduced.
定量测定了21种苏里南商用木材的灰分及二氧化硅含量。
The ash and silica content of 21 species of commercial woods of Surinam have been quantitatively determined.
提出了一种新的测定粉煤灰中二氧化硅的方法，该方法简单易行、快速、准确。
A new method to determine silicon dioxide in powder coal ash has been stated. The method is feasible, fast and accurate.
通过对比试验发现：测定炭素材料中二氧化硅的含量，熔融法的分析结果比氢氟酸法更稳定、准确；
The comparative tests show that the content of silicon dioxide in carbon materials determined by the melting method (MM) is more stable and accurate than the hydrofluoric acid method (MHA);
仅用一套二氧化硅为基体的人工标准，就能测定多种单矿物中的25项伴生元素和痕量元素。
One single set of synthetic standards of silica matrix will suffice for the determination of as many as 25 associated elements and trace elements in a variety of minerals.
本法测定锰矿标样（冶金部标准样品505）中二氧化硅含量，其测定结果的相对标准偏差RSD为1.08%，测定平均值为33.93%（标样推荐值为33.58%）。
The standard sample(metallurgy department standard sample 505)was measured by this method with the RSD of 1.08% and the mean content value of 33.93%(recommendation value of standard sample is 33.58%).
通过使用本实验室设计的低温拉伸夹具，测定了纳米二氧化硅改性环氧树脂复合材料在室温和液氮（77K）环境下的拉伸强度、弹性模量和延伸率。
Measurement of tensile strength , modulus and strain of nanometer SiO2/epoxy composite materials was conducted using self-designed tensile testing jigs at room temperature and 77K.
通过使用本实验室设计的低温拉伸夹具，测定了纳米二氧化硅改性环氧树脂复合材料在室温和液氮（77K）环境下的拉伸强度、弹性模量和延伸率。
Measurement of tensile strength , modulus and strain of nanometer SiO2/epoxy composite materials was conducted using self-designed tensile testing jigs at room temperature and 77K.
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