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AssigneeMITSUI MINING & SMELTING CO., LTD., Tottori University
InventorsKoutoku Ohmi, Makoto Higuchi, Jun-ichi Itoh, Tomoyasu Yano, Asuka Sasakura
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A method for producing a blue phosphor, comprising firing a mixture for 2 to 24 hours at a temperature of 800° C. or higher in an atmosphere of hydrogen sulfide, carbon disulfide, or an inert gas, the mixture containing a barium compound component, a silicon compound component, and a cerium compound component in quantitative proportions such that the atomic ratios of the components fulfill the equations 0.50<Si/Ba≦0.70 and 0.0005≦Ce/Ba≦0.03, or the mixture further containing a sulfur compound component in addition to these components. The blue phosphor has high color purity, high luminance, high chemical stability, and a low crystallization temperature, and is suitable for use in displays such as FED, PDP, and EL displays, or for use in the excitation of near-ultraviolet LED.
A method for producing a blue phosphor, comprising firing a mixture in an atmosphere of hydrogen sulfide or carbon disulfide, the mixture containing a barium compound component, a silicon compound component, and a cerium compound component in quantitative proportions such that atomic ratios of the components fulfill the following equations:
A method for producing a blue phosphor, comprising firing a mixture in an atmosphere of hydrogen sulfide, carbon disulfide or an inert gas, the mixture containing a barium compound component, a silicon compound component, a cerium compound component, and a sulfur compound component in quantitative proportions such that atomic ratios of the components fulfill the following equations:
Dependencies are inferred from the claim text.