METHOD FOR MANUFACTURING CERAMIC METAL HALIDE LAMP, AND CERAMIC METAL HALIDE LAMP

摘要

PROBLEM TO BE SOLVED: To provide a ceramic metal halide lamp arranged so that the occurrence of crack in a seal portion of a tubule part of a discharge tube can be avoided even if the lamp is activated and deactivated repeatedly, and further improved in the corrosion resistance of the seal portion.;SOLUTION: A method for manufacturing a ceramic metal halide lamp comprises the step of forming a slurry including silicon oxide, dysprosium oxide and aluminum oxide so that the content of the silicon oxide is given by X(SiO₂)=37-51 mol%, and X(SiO₂)+X(Dy₂O₃)+X(Al₂O₃)=100 mol% (where X(Dy₂O₃)≥5 mol%, and X(Al₂O₃)≥10 mol%), provided that the content of the silicon oxide is represented by X(SiO₂) mol%, the content of the dysprosium oxide is represented by X(Dy₂O₃) mol%, and the content of the aluminum oxide is represented by X(Al₂O₃) mol%. The method further comprises the step of forming a frit including silicon oxide, dysprosium oxide and aluminum oxide so that the most frequent value in its particle diameter distribution is between 64-105 μm, and the content ratio of particles having diameters of 63 μm or less is 22 wt.% or more.;COPYRIGHT: (C)2015,JPO&INPIT