FLUORESCENCE EMITTING GLASS AND METHOD OF MANUFACTURING THE SAME

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PROBLEM TO BE SOLVED : To solve problems that fluorescence emitting glass using the light emission transition of rare earth ion is expensive because a rare earth element of a high cost raw material is used and a fluorescence emitting glass formed by dispersing a fluorescence emitting semiconductor fine particle into a glass matrix is difficult to improve productivity. SOLUTION : The fluorescence emitting glass comprises a glass composition which contains 5-15% WO3+W2O3(where, W2O5is contained by 0.01-15%), 15-25% P2O5, 60-75%ZnO and 0.06-10% Al2O3by mol% and in which the volume fraction of a glass phase is ≥70% and fluorescence caused by W5+ion contained in the glass composition is emitted in a visible ray region by the irradiation with exciting light of ultraviolet wavelength region. The fluorescence emitting glass is manufactured by melting a raw material at 1, 020-1, 400°C, keeping as it is to reduce the WO3source raw material and cooling. COPYRIGHT : (C)2008, JPO&INPIT