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稀土摻雜Bi4Ti3O12(BTO)鐵電材料的制備與性能研究

時間:2019-04-27 10:14來源:畢業論文
通過發射光譜分析,在532nm波長激發下,Bi4-xNdxTi3O12樣品的發光都位于1050-1100nm之間,處于近紅外波段,對應著Nd3+的4F3/2-4I11/2的躍遷。x=0.15時的發光強度最強

摘要Bi4Ti3O12(BTO)是一種典型的鉍層狀鈣鈦礦結構的鐵電材料,它具有良好的介電性、鐵電性、多鐵及光催化等性能。我們通過傳統的固相法合成了一系列多晶Bi4-xNdxTi3O12(BTO:xNd3+)樣品,其中x=0,0.05,0.10,0.15,0.20。經過工藝優化,制備一系列純相的Nd3+摻雜Bi4Ti3O12粉體,并研究它們發光等特性。通過實驗數據分析發現,當熱處理溫度為750℃時,所有樣品中除了BTO主相存在以外,還存在Bi12TiO20雜質相。當熱處理溫度進一步升高到850℃時,純BTO相和Bi3.95Nd0.05Ti3O12相中存在極少量的Nd2O3雜質相。當進一步升溫到900℃時,BTO相和Bi3.95Nd0.05Ti3O12相是完全純相,但Bi4-xNdxTi3O12 (x=0.10,0.15,0.20) 的樣品中還是存在極少量的Bi12TiO20雜質相,煅燒溫度需要進一步提高。通過發射光譜分析,在532nm波長激發下,Bi4-xNdxTi3O12樣品的發光都位于1050-1100nm之間,處于近紅外波段,對應著Nd3+的4F3/2-4I11/2的躍遷。x=0.15時的發光強度最強。34903
畢業論文關鍵詞:Bi4Ti3O12;發光性能;固相法
Preparation and properties of Nd3+ doped Bi4Ti3O12
Ferroelectric materials
Abstract
Bi4Ti3O12  is a type of typical ferroelectric materials of bi-layer perovskite structures. It has good dielectricity, ferroelectricity, multiferroic and photocatalytic activities.A series of polycrystalline Bi4-xNdxTi3O12 (BTO:xNd3+) (x=0.05,0.1,0.15,0.2) samples were synthesized through the solid-state reaction method.We prepared pure phase of rare earth doped Bi4Ti3O12 powders and their photoluminescence properties have also been investigated. Experimental datas analysis that when the heat treatment temperature is at 750 ℃, all samples shows BTO main phase , with additional Bi12TiO20 impurity phase. When the heat treatment temperature was further increased to 850 ℃, pure BTO phase and Bi3.95Nd0.05Ti3O12 phase exists, with a very small amount of impurity phases Bi12TiO20. When the temperature was further increased to 900 ℃, pure BTO phase and Bi3.95Nd0.05Ti3O12 phase are completely obtianed, Bi4-xNdxTi3O12 (x = 0.10,0.15,0.20) sample still exists a very small amount of impurity phases Bi12TiO20 at 900 ℃  and, calcination temperature needs to be further improved. By emission spectroscopy, at 532nm excitation wavelength, the light emission Bi4-xNdxTi3O12 samples are located between 1050-1100nm, in the near infrared band, corresponding to the transition of Nd3 + 4F3 / 2-4I11 / 2 in. When x=0.05,the emission intensity is the strongest. 源`自*六)維[論*文'網www.aftnzs.live
Keywords: Bi4Ti3O12;luminescence property;solid-state reaction method
目錄
1 緒論    1
1.1 Bi4Ti3O12晶體概述    1
1.1.1 Bi4Ti3O12晶體結構    1
1.1.2 Bi4Ti3O12晶體性能    2
1.1.3 Bi4Ti3O12晶體的應用    4
1.1.4 Bi4Ti3O12粉體的制備    5
1.2 選題的意義和目的    6
1.3 研究內容和研究目標    6
2 實驗部分    8
2.1 原料及試劑    8
2.1.1 固相法原料及試劑    8
2.1.2 水熱法原料及試劑    8
2.2 實驗設備和儀器    9
2.3 Bi4Ti3O12粉體的制備    10
2.3.1 固相法基本介紹    10
2.3.2 固相法合成Bi4Ti3O12粉體    11
2.3.3 固相法合成Nd摻雜Bi4Ti3O12粉體    12
2.3.4 水熱法合成Bi4Ti3O12粉體    12
2.3.5 Bi4-xNdxTi3O12粉體樣品表征    13
3 結果與討論    14
3.1 Bi4-xNdxTi3O12粉體物相分析    14
3.1.1固相法合成未摻雜Bi4Ti3O12粉體    14
3.1.2 固相法合成Bi4-xNdxTi3O12粉體    15
3.1.3 水熱法合成Bi4Ti3O12粉體    20 稀土摻雜Bi4Ti3O12(BTO)鐵電材料的制備與性能研究:http://www.aftnzs.live/cailiao/20190427/32617.html
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