分析仪器
分析儀器
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ANALYTICAL INSTRUMENTATION
2009年
6期
45-47
,共3页
马艳平%刘英明%张月芳%崔启良
馬豔平%劉英明%張月芳%崔啟良
마염평%류영명%장월방%최계량
石膏%拉曼光谱%高温%原位
石膏%拉曼光譜%高溫%原位
석고%랍만광보%고온%원위
利用A LINKAM (TMS94)温度控制系统产生高温, 在31℃～301℃温度范围内,对石膏(CaSO_4·2H_2O)晶体进行了原位高温拉曼光谱法研究.结果表明,在151℃附近,对称性伸缩振动范围属于熟石膏的特征拉曼振动模式(1026cm~(-1)出现),表明石膏转变成熟石膏(也叫烧石膏),继续加温至301℃,熟石膏(CaSO_4·0.5H_2O)的拉曼光谱没有明显变化,熟石膏晶体结构稳定.
利用A LINKAM (TMS94)溫度控製繫統產生高溫, 在31℃～301℃溫度範圍內,對石膏(CaSO_4·2H_2O)晶體進行瞭原位高溫拉曼光譜法研究.結果錶明,在151℃附近,對稱性伸縮振動範圍屬于熟石膏的特徵拉曼振動模式(1026cm~(-1)齣現),錶明石膏轉變成熟石膏(也叫燒石膏),繼續加溫至301℃,熟石膏(CaSO_4·0.5H_2O)的拉曼光譜沒有明顯變化,熟石膏晶體結構穩定.
이용A LINKAM (TMS94)온도공제계통산생고온, 재31℃～301℃온도범위내,대석고(CaSO_4·2H_2O)정체진행료원위고온랍만광보법연구.결과표명,재151℃부근,대칭성신축진동범위속우숙석고적특정랍만진동모식(1026cm~(-1)출현),표명석고전변성숙석고(야규소석고),계속가온지301℃,숙석고(CaSO_4·0.5H_2O)적랍만광보몰유명현변화,숙석고정체결구은정.
In-situ Raman spectra of gypsum have been studied in the temperature range of 31～301℃ at ambient pressure. The high temperature was obtained with a Linkam (TMS 94) temperature control system. Near the temperature of 151℃ , a new Raman peak at 1026 cm~(-1) was observed in the range of symmetric stretching vibration. It is the characteristic vibration mode of bassanite, indicating that gypsum has transformed into bassanite. There is no obvious spectral change in the temperature range of 151～301℃ , showing that the crystal structure of bassanite is stable.
