Zr, Mo, W and Ta determination in niobium alloys

The standard test method specifies Zr (Zirconium), Mo (Molybdenum), W (Tungsten) and Ta (Tantalum) determination in niobium alloys.
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The sample preparation consists of fusing the sample batch with potassium pyrosulfate. The obtained fuse is grinded to the particle size of 71 micron.
Then the powder sample material  is pressed into two pellets in a boron acid cup. Boron acid cup is pressed out with a shaped punch being at least 3 mm deep. Sample material is put into the cup and pressed with a flat punch into a pellet.
The pellet is put into the sample holder and then into a spectrometer. Analysis is carried out automatically according to the chosen program. The program can determine all elements (oxides) listed in the test method or some of those elements by choice.
The standard test method specifies element mass content determination in the ranges listed in the table:

ElementMass content range, %
Zr0,2 – 2,5
Mo
0,5–6,0
W
2,0 – 12,0
Ta
0,15 – 1,5
Laboratory grinder LDI-65
desk top laboratory grinder. The grinder is used for uniform grinding of sample material. The grinder is recommended for powder sample preparation for XRFA.
It provides required particle size, and uniform grinding. The grinding plates do not introduce additional elements into the sample material, therefore does not add errors to analysis.
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Hydraulic laboratory press PGR - 10
desk top manually operated hydraulic press is recommended for powder sample pressing to improve analysis results.
There are two modifications differ in available stresses – either from 0 to 10 ton or from 0 to 20 ton.
The modification is chosen dependent on the material for analysis and customer analytical task.
The delivery set includes molders of various diameters dependent on the analytical task.
ПГР - 10

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Agate mortar
The mortar is used for manual suspension and powder grinding, as well as for mixing small portions of substances used in scientific research.

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