Abstract
In the accurate analysis of ceramic powders with few or no available standards by X-ray fluorescence spectrometry, the glass bead technique combined with the Fundamental Parameter (FP) method is suitable. As an example of ceramic powder analysis, we determined Y2O3, BaO, and CuO in a superconductor YBa2Cu3O7-δ with this combined method.The results obtained were as follows:1) Satisfactory glass beads with near-infinite thickness to both incident and fluorescent X-rays were found to be prepared from 10g of Na2B4O7, 1g of sample, and 0.20g of potassium iodide.2) The calculation of the absorption enhancement effects for the YKα, BaKα, and CuKα lines got the results below. The YKα line is more absorbed by substituting Y2O3 in the mixed reagents (Y2O3-BaO-CuO) with either BaO or CuO. The BaKα line is enhanced [a little more absorbed] by substituting BaO in the mixed reagents with CuO [Y2O3] The CuKα line is more absorbed [a little enhanced] by substituting CuO in the mixed reagents with BaO [Y2O3].3) Y2O3, BaO, and CuO in the superconductor were determined with the good accuracies (σd'S) of 0.11wt%, 0.18wt%, and 0.19wt%, respectively by the combined method.
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