本文選題：玻璃法 + 化學(xué)-玻璃法��； 參考：《華北電力大學(xué)(北京)》2017年碩士論文

【摘要】：本文利用配比不同的氧化硼、氧化鋇、二氧化鈦反應(yīng)體系,通過(guò)玻璃法制備鈦酸鋇,并用掃描電鏡、X射線衍射技術(shù)、透射電鏡、能譜分析等測(cè)試技術(shù)對(duì)實(shí)驗(yàn)產(chǎn)物進(jìn)行表征。對(duì)比研究了反應(yīng)物配比、冷卻介質(zhì)以及煅燒溫度等實(shí)驗(yàn)條件對(duì)產(chǎn)物的形貌和尺寸的影響。實(shí)驗(yàn)結(jié)果表明,在相同實(shí)驗(yàn)條件下,反應(yīng)體系配比為3:5:2和3:3:2時(shí),能更穩(wěn)定地制備出鈦酸鋇粉體。針對(duì)3:3:2配比體系,在相同溫度下煅燒后采用不同的冷卻介質(zhì),能獲得形貌差異較大的鈦酸鋇粉體,其中,1000℃下燒結(jié)然后空冷獲得的產(chǎn)物是形貌較規(guī)則的立方塊,油冷的產(chǎn)物整體形貌不規(guī)則,且伴隨不明納米顆粒的生成,水冷的產(chǎn)物中出現(xiàn)了納米團(tuán)簇。隨后,本文討論了不同燒結(jié)溫度對(duì)3:3:2配比體系在水冷條件下獲得產(chǎn)物的形貌和尺寸的影響。結(jié)果表明,隨著煅燒溫度的升高,產(chǎn)物中顆粒的尺寸呈穩(wěn)定增長(zhǎng)趨勢(shì),例如,800℃產(chǎn)物中的圓盤狀顆粒,在900℃的煅燒溫度下出現(xiàn)了厚度增長(zhǎng)的情況。最后,本文利用3:5:2配比體系,通過(guò)化學(xué)-玻璃法制備出了鈦酸鋇,并用掃描電鏡、X射線衍射技術(shù)等技術(shù)對(duì)產(chǎn)物進(jìn)行表征。結(jié)果表明,該法能制備出形貌穩(wěn)定的立方體鈦酸鋇顆粒。通過(guò)對(duì)化學(xué)-玻璃法和玻璃法反應(yīng)前驅(qū)體的差示熱分析和熱重分析,可以初步推斷,對(duì)于同一配比體系,采用化學(xué)-玻璃法達(dá)到反應(yīng)最大值所需的溫度略低于單一的玻璃法。
[Abstract]:In this paper, barium titanate was prepared by glass method using different reaction systems of boron oxide, barium oxide and titanium dioxide. The products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). The effects of reactant ratio, cooling medium and calcination temperature on the morphology and size of the product were studied. The experimental results show that barium titanate powder can be prepared more stably at 3:5:2 and 3:3:2 under the same experimental conditions. For the 3:3:2 system, barium titanate powders with different morphologies can be obtained after calcining at the same temperature in different cooling media. The products sintered at 1000 鈩，

本文編號(hào)：1858854