本文選題：硫系玻璃 + 提純��； 參考：《西安工業(yè)大學(xué)》2017年碩士論文

【摘要】：硫系玻璃具有結(jié)構(gòu)穩(wěn)定,紅外透過(guò)范圍較寬,在8~12μm紅外透過(guò)率高,以及制備周期短、原料成本低等優(yōu)點(diǎn),在紅外熱成像和紅外光學(xué)領(lǐng)域具有廣泛的應(yīng)用前景。但是由于雜質(zhì)吸收峰的存在導(dǎo)致硫系玻璃的紅外透過(guò)波段不能完全被利用,并且模壓成型技術(shù)的不成熟也制約了其在紅外光學(xué)領(lǐng)域的應(yīng)用。本文通過(guò)X射線衍射分析、傅里葉紅外光譜分析、差示掃描量熱分析、硬度、密度和熱膨脹測(cè)量等,對(duì)Ge_(23)Se_(67)Sb_(10)硫系玻璃的結(jié)構(gòu)和性能進(jìn)行了表征。通過(guò)鈦鎂提純法和蒸餾法對(duì)Ge_(23)Se_(67)Sb_(10)硫系玻璃原料進(jìn)行提純處理,制備出高透過(guò)率、低損耗的玻璃樣品。最后研究了模壓成型快速制備玻璃鏡片的制備工藝,分析了不同溫度、壓力、時(shí)間條件下的玻璃制品質(zhì)量與工藝之間的關(guān)系,確定出最佳的制備工藝。本文的研究結(jié)果如下:(1)通過(guò)鹽浴淬火成功制備出直徑達(dá)到80 mm Ge_(23)Se_(67)Sb_(10)玻璃試樣,發(fā)現(xiàn)大尺寸玻璃的紅外透過(guò)率受內(nèi)部成分分布和玻璃厚度影響。其中直徑為50 mm玻璃試樣徑向紅外透過(guò)率由邊緣向中心遞減,厚度對(duì)試樣的紅外透過(guò)率影響呈指數(shù)型,越厚則紅外透過(guò)率越低。采用鍍膜處理可將玻璃紅外透過(guò)率從60%提高到80%以上。(2)采用鈦鎂提純法和蒸餾法對(duì)玻璃中的雜質(zhì)進(jìn)行提純處理,成功消除了玻璃在2~16μm波段(除4.5μm處)的雜質(zhì)吸收,并且降低了4.5μm處的雜質(zhì)吸收,玻璃紅外透過(guò)率可達(dá)62%以上。(3)鹵素碘的引入成功將Ge_(23)Se_(67)Sb_(10)玻璃的紅外透過(guò)范圍從2.5~16μm擴(kuò)展到了2.5~25μm。發(fā)現(xiàn)隨著碘含量的增加,試樣的密度與硬度均逐漸減小,其熱膨脹系數(shù)也隨著先增加后減小。在加入7 wt.%的碘后,試樣的紅外透過(guò)率在2.5~16μm波段達(dá)到66%,在16~25μm波段達(dá)到40%。(4)模壓溫度和保壓時(shí)間是硫系玻璃熱壓成型的關(guān)鍵因素,通過(guò)實(shí)驗(yàn)發(fā)現(xiàn)在330℃模壓后并保壓20 min制品表面粗糙度相對(duì)最低,紅外透過(guò)率可達(dá)50%以上。模壓后樣品硬度達(dá)161.5 kg·mm~(-2)左右,比熔融淬冷法制備出的玻璃硬度增加了10 kg·mm~(-2)左右。
[Abstract]:Sulfur glasses have the advantages of stable structure, wide infrared transmission range, high infrared transmittance at 812 渭 m, short preparation period, low raw material cost, and so on. It has a wide application prospect in infrared thermal imaging and infrared optics. However, due to the existence of impurity absorption peak, the infrared transmission band of sulfur glasses can not be fully utilized, and the immaturity of molding technology also restricts its application in infrared optics. By means of X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), hardness, density and thermal expansion measurements, the structure and properties of the glass of the sulfur series Geal _ 23Seal _ (67) SbSP _ (10) have been characterized. The high transmittance and low loss glass samples were prepared by purifying and distilling the raw materials of GeS23SeSch _ (67) SB _ (+ 10) S _ 2O _ (10) glass by means of the methods of purification and distillation of titanium and magnesium. In the end, the preparation process of glass lens was studied, and the relationship between the quality of glass products under different temperature, pressure and time was analyzed, and the optimum preparation process was determined. The results of this paper are as follows: (1) through salt bath quenching, the glass samples up to 80 mm in diameter are successfully prepared. It is found that the infrared transmittance of large size glasses is affected by the distribution of internal components and the thickness of glass. The radial infrared transmittance of the glass sample with diameter of 50 mm decreases from the edge to the center, and the influence of thickness on the infrared transmittance of the sample is exponential. The thicker the sample is, the lower the infrared transmittance is. The infrared transmittance of glass can be increased from 60% to more than 80% by coating treatment. The impurity in glass can be purified by titanium and magnesium purification method and distillation method. The impurity absorption of glass in the band of 2x 16 渭 m (except 4.5 渭 m) has been successfully eliminated. Moreover, the impurity absorption at 4.5 渭 m was reduced, and the infrared transmittance of the glass was over 62%. 3) the introduction of halogen iodine successfully extended the infrared transmission range of the glass from 2.5 ~ 16 渭 m to 2.5 ~ 25 渭 m. It is found that the density and hardness of the sample decrease with the increase of iodine content, and the coefficient of thermal expansion increases first and then decreases. After the addition of iodine for 7 wt.%, the infrared transmittance of the sample reached 66 in the band of 2.5 ~ 16 渭 m, and reached 40 ~ 4 at the band of 16 ~ 25 渭 m) the molding temperature and the holding time were the key factors in the hot pressing of the sulfur glass. It is found that the surface roughness of 20 min products is the lowest after moulding at 330 鈩，

本文編號(hào)：2039453