Production of tellurite bottle doped with quantum dots of lead tellurite
NOVELTY – Tellurite bottles are prepared doped with quantum dots of lead tellurite. The dots are crystalline, making use of lead oxide, metallic tellurite or even lead tellurite in the form of powder. Losses through evaporation of these compounds with high steam pressures are practically eliminated by the use of the raw material barium trioxide in a crucible of covered platinum, which takes the atmosphere within the reduction crucible by evaporation of carbon dioxide. USE – Used for preparing tellurite bottles doped with quantum dots of lead tellurite. DETAILED DESCRIPTION – The raw materials with the compounds of lead tellurite are cast in a resistance furnace at low temperatures of about 850degreesC for two hours, followed by glass in a liquid form being poured into a steel mold, where after cooling it is reheated to 380degreesC for elimination of internal tensions. The material is then heated for 8 hours at 400degreesC to carry out the process of nucleation of the quantum dots of lead tellurite. The temperature is then increased to 450degreesC for at least 25 hours when the quantum dots grow so that their diameters increase in size as a function of the increase in time duration.
Main Application Field
L01 (Glass – includes chemical compositions, batch treatment, furnaces, flat glass forming, hollow-ware forming, postforming and glass/ceramics, but not lens designs, bottling, bottle-washing, closures for containers, glazing designs, glass cutting, chamfering edges, printing on glass, disposing of used glass or the production of pure sodium silicate. Chemical aspects of optical fibres (C03).)
INVENTORS:
BARBOSA LUIZ CARLOS
CESAR CARLOS LENZ
JACOB GILBERTO JÚNIOR
15_VIDROS
Patent number: BR200406092-A;BR200406092-B1
PATENT STATUS:
GRANTED
FOR ADDITIONAL INFORMATION:
parcerias@inova.unicamp.br
+55 (19) 3521-5207 / 2607
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