蛍光X線分析法によるセメントの定量分析

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The fluorescent X-ray analysis was successfully applied to determine the six major com-ponents in portland cement. The measurements were carried on to determine the contents of Fe2_O_3,CaO, SO_3,SiO_2,Al_2O_3 and MgO, by a X-ray spectrograph with specially designed sample chamber, using ammonium dihydrogen phosphate (d=5.324 a.u.) as an analysing crystal, and in an atomosphere of hydrogen by means of gas-flow proportiona] counter and pulse height analyser. Calibration curves were prepared from the commercial cements containing various amourrts of above oxides. In order to avoid the error caused by un uniformity of packing powder samples were pressed to the plates of the size 2 cm><3 cm under the pressure of 300 kg/cm^2. The determination of the components were made by comparing the intensities of FeK_al, CaK_aII, SK_a1,SiK_a1 AIK_al, and MgK_a I of unknown to those of standard samples which were polished piece of Basalt, Calcite, Sulpher, and the plate of metallic magnesium. T. he correction of the absorption effect of incident fluorescent X-ray was made taking into account o t e mass absorption coffcient as well ss the geometrical characteristics of the apparatus. Standard deviation of the analytical values obtained by the method given above with the calibration curves were 0.06% for Fe_2O_3,0.14% for CaO, 0.11% for SO_3,0.27% for SiO_2,0.27% for Al_2O_3,and 0.16 for MgO. Differences 0f the moduli obtained by fluorescent X-ray and chemical analysis were 0.03,0.10,0.08,0.03 in silica modulus (SM), activity index (Al), iron modulus (IM), and hydraulic modulus (HM), respectively. It has been proved that the complete determination 0f six major components given above can be carried out within about an hour, and that the proposed method may be applied as a : rapid analysis for the quality control in the portland cement industry.
社団法人日本セラミックス協会の論文
1962-01-01

蛍光X線分析法によるセメントの定量分析

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