Method for producing optically stimulated luminescene dosage detection crystal
AssigneeMitch M. C. Chou
InventorsMitch M. C. Chou, Chu-An Li
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Abstract
A method for producing an optically stimulated luminescene (OSL) dosage detection crystal is disclosed, where an Al2O3 is first covered with carbon. The carbon atoms are diffused then in vacuum into the Al2O3 lattices. Then, the oxygen and carbon atoms react with each other in an anneal process under 1 atm. At this time, oxygen and the carbon atoms are enabled to react with each other, and thus C+O result in CO, or C+O2 form CO2, so that oxygen vacancy deficiencies are formed in the Al2O3 crystal. At this time, a uniformly carbon distributed crystal structure is thus simply obtained.
Claims4
A method for producing an optically stimulated luminescene (OSL) dosage detection crystal, comprising steps of:
- (a) coating a carbon film outside an Al2O3, so that a carbon in the carbon film covers the Al2O3 to form a carbon-covered Al2O3 structure;
- (b) placing the carbon-covered Al2O3 into a furnace, and subjecting the carbon-covered Al2O3 in the furnace to a diffusion process at a temperature of 1500° C. to 1900° C. in a vacuum oxygen-free environment so that carbon atoms in the carbon is diffused into Al2O3 lattices in the Al2O3;
- and
- (c) performing an annealing process in an open furnace at a pressure of 1 atm and a temperature of 1400° C. to 1800° C., so that the oxygen in the lattices within the Al2O3 reacts with the carbon to form a plurality of oxygen vacancy defects, whereby producing a C:Al2O3 structure.
Dependencies are inferred from the claim text.