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Optical Properties according to BaO Addition for BaO-GeO2-La2O3-ZnO System

BaO-GeO2-La2O3-ZnO 계에 있어서 BaO 첨가량 변화에 따른 광학 특성

Jaeyoung Cho12
,
Jinho Kim1
,
Sae-Hoon Kim3
,
Mijai Lee1†
조 재영12
,
김 진호1
,
김 세훈3
,
이 미재1†
1Display Materials Center, Korea Institute of Ceramic Engineering & Technology, Jinju 52851, Republic of Korea
2Department of Physics, Kyungpook National University, Daegu 41566, Republic of Korea
3Department of Ceramic Engineering, Gangneung Wonju National University, Gangneung 25457, Republic of Korea
1한국세라믹기술원 소재융합고도화본부 디스플레이소재센터
2경북대학교 자연과학대학 물리학과
3강릉원주대학교 세라믹신소재공학과
†Corresponding author E-Mail : im1004@kicet.re.kr (Mijai Lee, KICET)
September 2022. pp. 379-383
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Abstract

In this study, Barium Germanium glasses were prepared with a composition of xBaO-(72-x)GeO2-8La2O3-20ZnO where x = 16.0, 18.0, 20.0, 22.0 and 24.0 mol% respectively. Their physical and optical properties, such as refractiveness index, glass transition temperature (Tg), softening temperature (Ts), transmittance and Knoop hardness were studied. The results showed that refractive index, Tg, Ts and coefficient of thermal expansion (CTE) increased with increasing BaO concentration. The refractive index of all the prepared samples was observed between 1.7811 to 1.7881. The Abbe number was calculated by formula using nd (589.3 nm), nf (656.3 nm) and nc (486.1 nm) and observed to be between 38 to 40. The Abbe number of the prepared sample was similar to that of BaO and GeO2. The transmittance of the prepared glasses was observed to be between 80 ~ 82 % throughout the range from 200 nm to 800 nm. Knoop hardness divided into seven steps were measured 5 class (≥ 450 ~ < 550) of all prepared samples.

Keywords
bao-geo2 glass
tg
knoop hardness
abbe number
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 32
  • No :9
  • Pages :379-383
  • Received Date : 2022-06-14
  • Revised Date : 2022-08-03
  • Accepted Date : 2022-09-07
  • DOI :https://doi.org/10.3740/MRSK.2022.32.9.379
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