發(fā)布時間：2018-05-23 07:02

  本文選題：合成歐泊 + 體色�。� 參考：《巖礦測試》2017年01期

【摘要】：近些年來,相關(guān)人工合成歐泊的研究工作主要聚焦于天然與合成歐泊的鑒別與篩選,而相關(guān)合成歐泊的微結(jié)構(gòu)、變彩機制及其中水的賦存狀態(tài)的深入研究鮮見報道。本文通過傅里葉變換紅外光譜(FTIR)、場發(fā)射掃描電鏡(FE-SEM)對一類合成歐泊的微結(jié)構(gòu)、結(jié)構(gòu)缺陷進行較系統(tǒng)的研究。同時,結(jié)合對樣品的熱處理就該合成歐泊體色、變彩機制及其中水的賦存狀態(tài)作了初步探討。結(jié)果表明:該樣品的紅外光譜中,在約2900 cm~(-1)、1737 cm~(-1)處出現(xiàn)合成歐泊特征吸收,且在4000~6000 cm-1波段,合成歐泊相比天然歐泊的吸收峰更為復(fù)雜。合成歐泊的顏色由體色與變彩兩者共同構(gòu)成,該體色與存在于其微結(jié)構(gòu)中準球狀、粒徑約205 nm的二氧化硅顆粒的間隙填充物直接關(guān)聯(lián),且在熱處理條件下隨著間隙物的析出而漸退。同時,該類合成歐泊的變彩歸因于結(jié)構(gòu)致色并由其內(nèi)部SiO_2顆粒周期性排列而構(gòu)成的三維的光子帶隙結(jié)構(gòu)所致。此外,在歐泊的微觀結(jié)構(gòu)發(fā)生重構(gòu)前,變彩所呈現(xiàn)的顏色主要由準球狀二氧化硅顆粒粒徑與間隙填充物決定。
[Abstract]:In recent years, the research work on synthetic Opel has focused on the identification and screening of natural and synthetic Opel. However, there are few reports on the microstructures, color changing mechanism and the occurrence state of water in synthetic Opel. In this paper, Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FE-SEM) are used to study the microstructures and structural defects of a class of synthetic opal. At the same time, combined with the heat treatment of the sample, the synthesis of the opal color, the mechanism of color change and the occurrence of water in the sample were preliminarily discussed. The results show that the characteristic absorption of synthetic opal is observed at about 2900 cm ~ (-1) ~ (-1) in the infrared spectrum of the sample, and the absorption peak of synthetic Opel is more complex than that of natural Opel at the wavelength of 4 000 ~ 6 000 cm-1. The color of synthetic opal is composed of both body color and color variation. The color is directly related to the interstitial filler of silica particles, which exist in its microstructure and are about 205nm in diameter. And under the condition of heat treatment, it retreats with the precipitation of the interstitial matter. At the same time, the color variation of this kind of synthetic opal is attributed to the three-dimensional photonic band gap structure formed by the chromogenic structure and periodic arrangement of the inner SiO_2 particles. In addition, before the reconstruction of the microstructure of Opal, the color of color change is mainly determined by the particle size of quasi-spherical silica particles and interstitial fillers.
【作者單位】： 浙江省質(zhì)量檢測科學研究院;浙江工業(yè)大學材料科學與工程學院;
【基金】：國家自然科學基金資助項目(21506187) 浙江省質(zhì)量監(jiān)督系統(tǒng)科研計劃項目(20130207)
【分類號】：TQ164

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本文編號：1923737