Calcium Phosphate 유백제 투입량에 따른 LED Diffuser용 유백유리의 특성 (Characteristics of Opal Glass by Calcium Phosphate Opacifier for a LED Light Diffuser)

서지정보

· 발행기관 : 한국세라믹학회
· 수록지 정보 : 한국세라믹학회지 / 50권 / 1호 / 75 ~ 81페이지
· 저자명 : 구현우, 임태영, 황종희, 김진호, 이미재, 신동욱

초록

We fabricated translucent opal glass to replace the polycarbonate diffuser in LED lighting systems in order to solve the durability problem. Batch materials of opal glass with a composition of calcium phosphate were created and melted at 1550 oC, and the effect of opaqueness was identified by an addition of 1 ~ 7% calcium phosphate as an opacifier raw material. As a result, translucent opal glass was obtained by the melting of the mixed batch materials with a composition of more than 5% calcium phosphate glass at 1550 oC for 2 hrs, which had excellent optical properties for the diffuser of a LED lighting system with no dazzling from direct light by a high haze value exceeding 90% and a low parallel transmittance value of about 5%. For the thermal properties, the thermal expansion coefficient was found to be 5.6 ~ 5.9 × 10−6/oC and the softening point was 874 ~ 884 oC. In addition, good thermal properties such as good thermal shock resistance and feasibility for use with a general manufacturing process during the forming of glass tubes and bulbs were noted. Therefore, it is concluded that this translucent opal glass can be used as a glass diffuser material for LED lighting due to its high heat resistance and high durability as a replacement for a polycarbonate diffuser.

영어초록

We fabricated translucent opal glass to replace the polycarbonate diffuser in LED lighting systems in order to solve the durability problem. Batch materials of opal glass with a composition of calcium phosphate were created and melted at 1550 oC, and the effect of opaqueness was identified by an addition of 1 ~ 7% calcium phosphate as an opacifier raw material. As a result, translucent opal glass was obtained by the melting of the mixed batch materials with a composition of more than 5% calcium phosphate glass at 1550 oC for 2 hrs, which had excellent optical properties for the diffuser of a LED lighting system with no dazzling from direct light by a high haze value exceeding 90% and a low parallel transmittance value of about 5%. For the thermal properties, the thermal expansion coefficient was found to be 5.6 ~ 5.9 × 10−6/oC and the softening point was 874 ~ 884 oC. In addition, good thermal properties such as good thermal shock resistance and feasibility for use with a general manufacturing process during the forming of glass tubes and bulbs were noted. Therefore, it is concluded that this translucent opal glass can be used as a glass diffuser material for LED lighting due to its high heat resistance and high durability as a replacement for a polycarbonate diffuser.

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