LED 조명용 반투명 유백유리 Diffuser 조성 개발 및 특성 = Development and Characterization of Translucent Opal Glass for Diffuser of LED Lighting

다국어 초록 (Multilingual Abstract)

For the purpose of improving the durability problem, translucent opal glass was fabricated as a substitute for the polycarbonate diffuser of LED lighting. Calcium phosphate was used as an opacifier of opal glass and melted in an electric furnace. The opaque effect was identified according to the change of the cooling procedure. As results, translucent opal glass was obtained by the melting of a batch with a composition of 3.8% calcium phosphate at $1550^{\circ}C$ for 2 hrs and then the cooling of the material in the furnace. For the cooling condition of the glass sample, HTCG (High Temperature Cooled Glass) was found to have better optical properties than LTAG (Low Temperature Annealed Glass). It had excellent optical properties for a diffuser of LED lighting, with no dazzling from direct light due to its high haze value of over 99% and low parallel transmittance value of under 1%. For the thermal properties, it had an expressed thermal expansion coefficient of $5.7{\times}10^{-6}/^{\circ}C$ and a softening point of $876^{\circ}C$; it also had good thermal properties such as good thermal shock resistance and was easy to apply to the general manufacturing process in the forming of glass tubes and bulbs. Therefore, it is concluded that this translucent opal glass can be used as a glass diffuser material for LED lighting with high heat resistance and high durability; this material is suitable as a substitute for polycarbonate diffusers.

참고문헌 (Reference)

1 H. W. Jang, 25 (25): 3-, 2012

2 V. H. Stott, 8 : 148-, 1924

3 J. H. Baek, 11 : 21-, 2007

4 B. M. Jung, 20 (20): 31-, 2006

5 이헌석, "저온실링용 ZnO-V2O5-P2O5계 봉착재의 물성에 미치는 TiO2 의 영향" 한국재료학회 19 (19): 613-618, 2009

6 임태영, "석탄폐석을 이용한 소다라임계 컬러유리의 광학적 특성" 한국재료학회 20 (20): 524-534, 2010

7 Y. M. Yu, "Materials and Components of LED lighting for Technical Innovations" Korea Insititute for Advancement of Technology 14-, 2010

8 B. H. Kim, "Glass Technology" Chungmoon Gak 29-, 2009

9 B. H. Kim, "Glass Technology" Chungmoon Gak 380-, 2009

10 B. H. Kim, "Glass Technology" Chungmoon Gak 391-, 2009

11 S. Sakka, "Glass Handbook" Asakura Publishing Co. Ltd 689-, 1975

12 H. J. Jung, "Fusion Ceramic Materials(Text book for High School)" Ministery of Education Science and Technology 176-, 2003

13 H. J. Jung, "Fusion Ceramic Materials(Text book for High School" Ministery of Education Science and Technology 139-, 2003

14 "Electronics Infomation Center, Technology and Patent of LED" Korea Electronics Tecnology Institute 12-, 2012

15 T. Suzuki, "Data book of glass composition" The Glass Manufacturers’ association in Japan 48-, 1991