Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Characteristics and thermal stability of SrAl2O4: Eu2+, Dy3+ long afterglow phosphors synthesized solid state reaction and polymerized complex method

고상반응법과 착체중합법으로 합성된 SrAl2O4: Eu2+, Dy3+ 축광성 형광체의 특성 및 열적 안정성 평가

  • Kim, Tae-Ho (Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET)) ;
  • Hwang, Hae-Jin (School of Material Science and Engineering, Inha University) ;
  • Kim, Jin-Ho (Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET)) ;
  • Hwang, Kwang-Taek (Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET)) ;
  • Han, Kyu-Sung (Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET))
  • 김태호 (한국세라믹기술원, 이천분원) ;
  • 황해진 (인하대학교 신소재공학부) ;
  • 김진호 (한국세라믹기술원, 이천분원) ;
  • 황광택 (한국세라믹기술원, 이천분원) ;
  • 한규성 (한국세라믹기술원, 이천분원)
  • Received : 2016.08.26
  • Accepted : 2016.09.23
  • Published : 2016.10.31
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Abstract

Characteristics of $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ phosphorescent phosphors synthesized by solid state reaction and polymerized complex method were comparatively analyzed. In order to evaluate thermal stability of $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ phosphorescent phosphors at high temperature, phosphorescent properties of $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ were investigated with thermal treatment at $1250^{\circ}C$ under reducing atmosphere, which was the general heat treatment conditions for ceramic manufacturing process. The phosphorescent properties of thermally treated $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ phosphors synthesized by solid state reaction and polymerized complex method were investigated. The crystal structure and crystallite size were observed through XRD analysis. Microstructure and particle size of thermally treated $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ phosphors were analyzed by SEM and PSA. Photoluminescence and afterglow characteristics of thermally treated $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ phosphorescent phosphors were measured by spectrofluorometer.

고상반응법과 착체중합법 두 합성법에 의해 합성된 $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ 축광성 형광체 분말의 특성을 비교 분석하였다. 열적 안정성을 평가하기 위해 산업 도자 제조공정에서 사용되는 열처리 조건($1250^{\circ}C$, 1시간 유지, LPG 환원분위기)을 적용하여 고상반응법과 착체중합법으로 합성된 $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ 축광성 형광체 분말의 열처리 전후의 축광 특성변화를 관찰하였다. 두 합성법으로 합성된 분말과 고온 열처리 전후의 분말은 XRD 분석을 통해 결정구조 및 결정자 크기변화를 확인하였고, SEM과 PSA 분석을 이용하여 미세구조 및 입자 크기 변화를 관찰하였다. Spectrofluorometer 분석을 통해 $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ 축광성 형광체의 여기 및 발광 특성, 장잔광 특성 변화를 확인하였다.

Keywords

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