Direct current glow discharge mass-spectrography method for determination of impurity elements in high purity alpha-Al2O3
A technology of DC glow discharge and impurity elements, which is applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., to achieve the effect of simplifying the steps of sample pretreatment
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[0025] α-Al 2 o 3 The powder and copper powder (the content of each element to be tested is not higher than 0.1 μg / g) are mixed evenly at a ratio of 1:2, and the appropriate powder is selected by using a DY-60 electric powder tablet press (Tianjin Keqi High-tech Co., Ltd.). Pressure The mixed powder is pressed into tablets, the mold is selected as Φ=20mm, and six tablet samples are prepared in parallel. use N 2 Blow off the powder on the surface of the tableted sample and put it into the sample cell. Element GD glow discharge mass spectrometer (Thermo Fisher, USA) was used to adjust parameters such as discharge current and discharge gas flow rate, as shown in Table 1, and pre-sputter for 15 minutes to remove contamination on the surface of the tablet. Then measure with the measurement parameters in Table 1, collect the signals of the elements to be measured and the matrix elements Al, O and Cu, the instrument automatically gives the content of the elements to be measured in...
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