Glass manufacturing – Processes – Sequentially forming – reheating – and working
Patent
1987-08-11
1988-12-27
Lindsay, Robert L.
Glass manufacturing
Processes
Sequentially forming, reheating, and working
65134, 6537415, 7386491, C03B 1909
Patent
active
047938447
ABSTRACT:
A method for preparing glassy borate disks is disclosed where a determined amount of investigated material is mixed with borate flux, the mixture is homogenized and tableted; then the obtained tablet is melted in a graphite ring placed on a graphite support, the area of which corresponds to the number of graphite rings, at a temperature higher than 900 degrees C. and afterwards the melt is cooled. The investigated material, prior to taking a determined amount of it, is preheated at a temperature higher than 800 degrees C. The graphite ring in which the melting of the tablet is performed has a height approximately equal to the numeric value of the ratio of the mass of the investigated material and borate flux to the inner diameter of the graphite ring. The graphite support, has a mass approximately equal to the double value of the mass of investigated material and borate flux. The cooling of the melt along with the graphite ring and support is performed in an air medium.
REFERENCES:
patent: 3414454 (1968-12-01), Long
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patent: 3833347 (1974-09-01), Angle et al.
patent: 3844755 (1974-10-01), Angle et al.
Rapid Low Cost Manual Fusion Sample Preparation Technique for Quantatative X-Ray Fluorescence Analysis; Bowling et al, Owens Corning Fiberglass Technical Center Pub., pp. 491-496.
79 Inorganic Anal. Chem, vol 94, 1981, Article 94:149696e, Nov. 25, 1980.
79 Inorganic Anal. Chem, vol. 102, 1985, Article 102:214337p, Feb. 1985.
Geologicheski Institute
Lindsay Robert L.
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