수열처리법에 의한 아프리카산 천연루비의 색상개선 및 특성평가
Color enhancement and characteristics of natural rubies originated in Africa by the hydrothermaltreatment method
2
조회
0
다운로드
0
인용
0
참고문헌
초록
어두운 적색을 나타내는 아프리카산 천연루비의 색상개선을 열처리법과 수열처리법을 이용하여 행한 결과, 열 처리법은 색상이 떨어지는 역효과가 발생하였다. 그러나 수열처리법의 경우에는 색상과 투명도가 향상되었다. 아프리카산 천연루비의 색상개선에 대한 수열처리 조건은 다음과 같다. 즉, 수열용매: 1M Na2CO3-0.9M K2CO3, 반응온도: 450oC, 반응 시간: 48hrs, 충전율: 30%, 압력: 375atm이었다. 이와 같은 조건에서 얻어진 루비의 특성을 평가한 결과, ICP/MS와 XRF 분석결과로부터 수열처리 후 Cr3+, Fe3+, Ti4+ 등의 함량이 수열처리 전의 루비에 비해 감소됨을 알 수 있었으며, 이로 인하 여 적색이 밝아지는 것을 색차계 분석결과로부터 알았다. 이 결과는 수열처리 전과 비교하였을 때 Cr3+ 이온의 전자전이에 의해 발생되는 발광피크의 강도가 수열처리 후 감소한 PL 분석결과와 잘 일치하였다.
Abstract
Color enhancement of African rubies with dark red was caried out by the heat treatment and the hydrothermaltreatment method respectively. The heat treatment method brought about an adverse effect causing the color to bedeteriorated. However, the hydrothermal treatment method enhanced its color and clarity. The hydrothermal treatmentconditions for color enhancement of them were as follows: solvent: 0.9 M Na2CO3-1 M K2CO3, temperature: 450oC,duration: 48 hrs, filling: 30 %, presure: 375 atm. As the results of characteristics for African rubies obtained under theseconditions, it was known that the amount of Cr3+, Fe3+, Ti4+ was reduced after the hydrothermal treatment from the ICP/MSand XRF analyses. Also, it was found that the red color from the colorimeter analyses was getting lighter. These resultswere consistent with the PL analysis showing that the intensity of the luminescence peak generated by the electrontransition of Cr3+Key words African ruby, Color enhancement, Aggregation, Hydrothermal treatment method, Heat treatment method
참고문헌 (9)
- "Heat treatment of Tanzania ruby as monitored by ESR spectroscopy" (2000)
- "Rubies from Mong Hus", pp.2~ (1995)
- "Gemstone enhancement and detection in the 1990s" (2000)
- "Optimization of heat treatments of African green sapphires", 15, pp.873~ (2001)
- "Ruby and sapphire", pp.103~ (1997), RWH Publishing Boulder
- "The color enhancement of natural Zambian amethyst by the hydrothermal treatment" (2004)
- "The color enhancement of natural ruby produced from Mong Hsu" (2004)
- "Photoluminescence and atom force microscopic studies on pre-and post-irradiated ruby with Ni6+ ion", pp.533~ (2004)
- "The physics and chemistry of color", pp.89~ (1983)