PVT공정을 이용한 음향광학 가변 필터용 Hg<sub>2</sub>Br<sub>2</sub> 파우더의 고순도 정제

김태현; 이희태; 권인회; 강영민; 우시관; 장건익; 조병진

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자료유형: 학술저널

저자정보: 김태현 (충북대학교 신소재공학과) 이희태 (그린광학 광학소재그룹) 권인회 (그린광학 광학소재그룹) 강영민 (그린광학 광학소재그룹) 우시관 (그린광학 우주광학연구소) 장건익 (충북대학교 신소재공학과) 조병진 (충북대학교 신소재공학과)

저널정보: 한국재료학회 한국재료학회지 한국재료학회지 제28권 제12호

발행연도: 2018.1

수록면: 732 - 737 (6page)

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We develop a purification process of $Hg_2Br_2$ raw powders using a physical vapor transport(PVT) process, which is essential for the fabrication of a high performance acousto-optic tunable filter(AOTF) module. Specifically, we characterize and compare three $Hg_2Br_2$ powders: $Hg_2Br_2$ raw powder, $Hg_2Br_2$ powder purified under pumping conditions, and $Hg_2Br_2$ powder purified under vacuum sealing. Before and after purification, we characterize the powder samples through X-ray diffraction and X-ray photoelectron spectroscopy. The corresponding results indicate that physical properties of the $Hg_2Br_2$ compound are not damaged even after the purification process. The impurities and concentration in the purified $Hg_2Br_2$ powder are evaluated by inductively coupled plasma-mass spectroscopy. Notably, compared to the sample purified under pumping conditions, the purification process under vacuum sealing results in a higher purity $Hg_2Br_2$ (99.999 %). In addition, when the second vacuum sealing purification process is performed, the remaining impurities are almost removed, giving rise to $Hg_2Br_2$ with ultra-high purity. This high purification process might be possible due to independent control of impurities and $Hg_2Br_2$ materials under the optimized vacuum sealing. Preparation of such a highly purified $Hg_2Br_2$ materials will pave a promising way toward a high-quality $Hg_2Br_2$ single crystal and then high performance AOTF modules.

#acousto-optic tunable filters #$Hg_2Br_2$ powders #PVT #high purification #vacuum sealing

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