Process for producing a lithium borate thermoluminescent and fluorescent substance
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMutsuo Takenaga, Osamu Yamamoto
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Abstract
A process for producing a lithium borate thermoluminescent and fluorescent substance containing lithium borate as its main component which comprises heat-treating a mixture of Li.sub.2 B.sub.4 O.sub.7 powder and an activator element compound at a temperature under and neighboring the melting point of Li.sub.2 B.sub.4 O.sub.7, to provide a highly sensitive fluorescent substance which has good adherence to the substrate of a dosimeter.
Claims7
Process for producing a lithium borate (Li.sub.2 B.sub.4 O.sub.7) thermoluminescent and fluorescent substance of substantially spherical form containing lithium borate (Li.sub.2 B.sub.4 O.sub.7) as the main component which comprises mixing Li.sub.2 B.sub.4 O.sub.7 powder with an activator element compound and heat-treating the resultant mixture in air at a temperature of about 850.degree. C. to just below the melting point of Li.sub.2 B.sub.4 O.sub.7 for a time sufficient to diffuse the activator element into the crystal interior of the Li.sub.2 B.sub.4 O.sub.7 powder and effect formation of Li.sub.2 B.sub.4 O.sub.7 thermoluminescent substance of substantially spherical form.
Dependencies are inferred from the claim text.