| 摘要 |
PROBLEM TO BE SOLVED: To provide a cerium-containing oxide emitting fluorescence in the near-ultraviolet region when excited with rays in the vacuum ultraviolet region. SOLUTION: The cerium-containing oxide emits fluorescence having a wavelength of 320-380 nm in the near-ultraviolet region when excited with the vacuum ultraviolet rays having a wavelength of 200 nm or shorter and comprises an oxide which is comprised of O, Ca, Si, and Mg or Al and has solid-dissolved Ce therein. The cerium-containing oxide efficiently emits fluorescence having a wavelength of 320-380 nm in the near-ultraviolet region when excited with rays in the vacuum ultraviolet region containing resonance line emission of the xenon atom having a wavelength of 147 nm or excited molecule emission of xenon having a wavelength of 172 nm, and therefore is expected to be widely applied as a phosphor used for various ultraviolet emitting lamps which do not utilize mercury as a discharge gas as an excitation source. It is one of the advantages of the cerium-containing oxide that it does not contain a poisonous element such as thallium or lead unlike ultraviolet emitting phosphors known for long. COPYRIGHT: (C)2006,JPO&NCIPI
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