J. Korean Ceram. Soc. > Volume 21(3); 1984 > Article
 Journal of the Korean Ceramic Society 1984;21(3): 245.
 Willemite 형광체의 Photo-Luminescence 특성에 관한 연구 장창섭, 오근호, 이종근 한양대학교 무기재료공학과 The Study of Photo-Luminescence on Willemite Phosphor ABSTRACT Willemite phosphor is a good one having excellent luminescence efficiency that it;s emission wavelength is in the range of about 525 nm. The energy band gap of this willemite phosphor is about 4.1 eV. When the ratio of ZnO/SiO is 1.8 and Mncl in used as activator source the phosphor has the value of maximum luminescence efficiency. The characteristic of willemite phosphor is tendency of the dependence of temperature. The willemite which was fired with activator after being synthesized at initial firing without activator shows higher value of luminescence efficiency than willemite which was fired with activator in initial stage, When the concentration of activator is 1-1.5mol% it has its most favorite condition and the value of luminescence efficiency decreases according to increasement of activator concentration.
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