發(fā)布時間：2018-05-28 11:37

  本文選題：浮法玻璃 + 混合堿土效應(yīng)�。� 參考：《武漢理工大學(xué)》2015年碩士論文

【摘要】：浮法玻璃是建筑材料之一,浮法玻璃制造工業(yè)屬于典型的高能耗產(chǎn)業(yè),制備過程中需要消耗大量燃料,同時還會對環(huán)境造成污染。在玻璃熔制工藝中,熔融和澄清工藝消耗的熱能最大,因此降低玻璃高溫黏度,減少熔融和澄清所需溫度是降低玻璃工業(yè)能耗的一種有效途徑。本課題首先以鈉鈣硅酸鹽系浮法玻璃為研究對象,在保持CaO、MgO氧化物總含量和其他氧化物含量不變的情況下,制備了一系列不同CaO/MgO比的鈉鈣硅酸鹽系玻璃。采用維氏硬度研究玻璃的力學(xué)性質(zhì),熱膨脹系數(shù)儀和高溫旋轉(zhuǎn)黏度測量儀研究玻璃的熱學(xué)性質(zhì),拉曼光譜儀分析玻璃的顯微結(jié)構(gòu)。然后同樣以鈉鈣硅酸鹽系浮法玻璃為基礎(chǔ),保持CaO、Na2O、K2O總含量和其他氧化物不變的情況下,制備了一系列不同CaO/K2O比和一系列不同CaO/Na2O比的硅酸鹽系玻璃。采用維氏硬度計研究玻璃常溫下的性質(zhì),差示掃描熱分析法研究玻璃的熱學(xué)性能,拉曼光譜測試技術(shù)研究玻璃的顯微結(jié)構(gòu)。研究發(fā)現(xiàn):當[CaO]和[MgO]總摩爾含量保持15.42%不變的情況下,隨著[CaO]/([CaO]+[MgO])摩爾比從0增加到1,玻璃的維氏硬度、特征溫度、低溫黏度、高溫黏度、料性均呈現(xiàn)出先降低后升高的變化趨勢,并且當[CaO]/([CaO]+[MgO])摩爾比為0.5時這些性質(zhì)的值偏離線性的程度最大。拉曼光譜測試結(jié)果表明在這些玻璃的顯微結(jié)構(gòu)單元中,高聚合程度單元的含量先降低后升高,低聚合程度單元的含量先升高后降低,說明Ca/Mg系列混合堿土效應(yīng)會降低玻璃網(wǎng)絡(luò)的聚合程度。當保持[CaO]、[Na2O]和[K2O]總摩爾含量保持22.02%不變的情況下,隨著[CaO]/([CaO]+[R2O])(R=K,Na)摩爾比從0增加到1,玻璃的維氏硬度和玻璃轉(zhuǎn)變溫度出現(xiàn)具有正偏差的非線性下降趨勢,并且當[CaO]/([CaO]+[R2O])(R=K,Na)摩爾比約為0.4時性質(zhì)偏離線性的程度最大。拉曼光譜測試結(jié)果表明玻璃的顯微結(jié)構(gòu)單元中,高聚合程度單元的含量逐漸降低而低聚合度單元的含量逐漸升高,同時含量變化趨勢均為非線性的,說明Ca/R(R=K,Na)系列混合陽離子效應(yīng)提高了玻璃網(wǎng)絡(luò)聚合程度。此外,Ca/K系列樣品性質(zhì)偏離線性的程度大于Ca/Na系列的,表示Ca/K系列樣品混合陽離子效應(yīng)的強度大于Ca/Na系列樣品的,說明混合陽離子效應(yīng)的強度與離子半徑的差異有關(guān)。
[Abstract]:Float glass is one of the building materials. Float glass manufacturing industry is a typical high energy consumption industry, the preparation process needs to consume a lot of fuel, but also cause environmental pollution. In glass melting process, melting and clarification process consume the most heat energy, so reducing glass high temperature viscosity, reducing melting and clarifying temperature is an effective way to reduce energy consumption in glass industry. In this paper, a series of sodium calcium silicate glasses with different CaO/MgO ratios were prepared by taking the sodium calcium silicate system as the object of study, while keeping the total content of Cao / MgO oxides and the content of other oxides unchanged. The mechanical properties of glass were studied by Vickers hardness. The thermal properties of glass were studied by means of thermal expansion coefficient instrument and high temperature rotary viscometer. The microstructure of glass was analyzed by Raman spectrometer. Then a series of silicate glasses with different CaO/K2O ratios and different CaO/Na2O ratios were prepared on the same basis of sodium calcium silicate float glass and keeping the total content of Na2OK2O and other oxides unchanged. The properties of glass at room temperature were studied by Vickers hardness tester, the thermal properties of glass were studied by differential scanning calorimetry (DSC), and the microstructure of glass was studied by Raman spectroscopy. It was found that when the molar ratio of [CaO] and [MgO] remained unchanged at 15.42%, as the mole ratio of [CaO] / ([CaO] [MgO]) increased from 0 to 1, the Vickers hardness, characteristic temperature, low temperature viscosity, high temperature viscosity of the glass, Both of them showed a tendency of decreasing first and then increasing, and when the molar ratio of [CaO] / ([CaO] [MgO]) was 0.5, the degree of deviation from linearity of these properties was the greatest. The results of Raman spectroscopy showed that the content of high degree of polymerization unit decreased first and then increased, and the content of low degree of polymerization unit increased first and then decreased in the microstructure units of these glasses. It shows that the effect of Ca/Mg series mixed alkali soil can reduce the degree of polymerization of glass network. When the total molar contents of [CaO], [Na2O] and [K2O] remain unchanged at 22.02%, with the molar ratio of [CaO] / ([CaO] [R2O] ([CaO] [R2O] / R _ 2O] increasing from 0 to 1, the Vickers hardness of glass and the transition temperature of glass have a nonlinear decreasing trend with positive deviation. And when the molar ratio of [CaO] / ([CaO] [R2O] [R _ 2O]) is about 0.4, the degree of deviation from linearity is the greatest. The results of Raman spectroscopy show that the content of high degree of polymerization unit decreases gradually and the content of low degree of polymerization unit increases gradually in the microstructure unit of glass, and the change trend of content is nonlinear. The results show that the mixed cationic effect of Ca / R _ (R _ (+) _ (K _ (+) increases the degree of glass network polymerization. In addition, the degree of deviation of the properties of Ca / K series is greater than that of Ca/Na series, which indicates that the strength of mixed cation effect of Ca/K series sample is higher than that of Ca/Na series sample, which indicates that the strength of mixed cation effect is related to the difference of ion radius.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ171.721

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本文編號：1946561