發(fā)布時(shí)間：2018-02-20 17:09

  本文關(guān)鍵詞： 壓電 稀土 發(fā)光 鈦酸鉍鈉　出處：《內(nèi)蒙古科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著能源的日益緊缺，多功能材料越來越受到人們的重視，并且在一些高新技術(shù)領(lǐng)域已經(jīng)有了廣泛的使用。 壓電材料是科技領(lǐng)域中不可或缺的一種非常重要的材料，廣泛應(yīng)用于軍事，航空航天，農(nóng)業(yè)等各個(gè)領(lǐng)域。但是，目前使用較廣泛的是鉛基壓電材料，，雖然性能優(yōu)越，但是對人類的生活環(huán)境和自身健康都有嚴(yán)重的危害。近年來，學(xué)者們對無鉛壓電材料的研究越來越深入，并取得了可喜的成果。本文就是以被認(rèn)為是最有希望取代鉛基壓電材料的鈦酸鉍鈉無鉛壓電材料為基體，通過摻雜具有色純度高、能量轉(zhuǎn)換效率高、熒光壽命長以及對抗輻照穩(wěn)定性強(qiáng)等優(yōu)點(diǎn)的稀土，研究其光電性能。本論文采用傳統(tǒng)的高溫固相法，圍繞Sm3+摻雜鈣鈦礦結(jié)構(gòu)的鈦酸鉍鈉材料的結(jié)構(gòu)和發(fā)光性能進(jìn)行了系統(tǒng)的研究。其主要內(nèi)容包括以下： 采用高溫固相法制備了(Bi0.5Na0.5)1-xSmxTiO3無鉛壓電陶瓷，對其相結(jié)構(gòu)及發(fā)光性能進(jìn)行了研究。首先研究了釤濃度及燒結(jié)溫度對BNT:Sm3+發(fā)光性能的影響。發(fā)現(xiàn)其發(fā)光性能隨釤濃度的增大而升高，并在摻雜濃度為x=0.015時(shí)達(dá)到最大值，之后產(chǎn)生濃度猝滅效應(yīng)發(fā)光強(qiáng)度迅速下降。燒結(jié)溫度對發(fā)光性能也有很大影響，在900℃-1200℃范圍內(nèi)，隨著燒結(jié)溫度的升高，樣品發(fā)光強(qiáng)度逐漸增強(qiáng)，并在1150℃時(shí)達(dá)到峰值，之后發(fā)光強(qiáng)度呈下降趨勢。 另外，對樣品發(fā)光強(qiáng)度最大即摻雜濃度為x=0.015時(shí)在不同溫度下進(jìn)行了發(fā)光性能的測試，在從室溫開始加熱時(shí)，發(fā)光強(qiáng)度迅速增強(qiáng)，在160℃左右達(dá)到最大值，之后隨著測試溫度的升高而降低。 根據(jù)電荷補(bǔ)償原理在BNT:Sm3+樣品A位摻雜堿金屬離子形成(Bi0.5Na0.5)1-2xSmxMxTiO3（M=Li+、Na+、K+），結(jié)果發(fā)現(xiàn)一價(jià)堿金屬離子的引入都能顯著提高樣品的發(fā)光強(qiáng)度，其中K+離子提升幅度最大。 本文還研究了鉍的濃度和B位摻雜Zr4+取代Ti4+對鈦酸鉍鈉基無鉛壓電陶瓷發(fā)光性能的影響，都顯示除了規(guī)律性特征，只影響了樣品的熒光發(fā)射強(qiáng)度，但是上述所有的摻雜取代并沒有改變BNT:Sm3+發(fā)光的分布狀況。依然保持三個(gè)強(qiáng)發(fā)射峰。
[Abstract]:With the increasing shortage of energy, multifunctional materials have been paid more and more attention, and have been widely used in some high-tech fields. Piezoelectric material is an indispensable and important material in the field of science and technology. It is widely used in military, aerospace, agriculture and other fields. However, at present, it is widely used as lead-based piezoelectric material, although its performance is superior. In recent years, scholars have studied lead-free piezoelectric materials more and more deeply. In this paper, the lead free piezoelectric material of bismuth sodium titanate, which is considered to be the most promising alternative to lead based piezoelectric material, is used as the matrix, which has high color purity and high energy conversion efficiency by doping. The optoelectronic properties of rare earths which have the advantages of long fluorescence lifetime and strong stability against irradiation are studied. In this paper, the conventional high temperature solid state method is used to study the optical and electrical properties of rare earths. The structure and luminescence properties of Sm3 doped sodium bismuth titanate are studied systematically. The main contents are as follows:. Bi0.5Na0.5Na-1-xSmxTiO3 lead-free piezoelectric ceramics were prepared by high temperature solid state method. The phase structure and luminescence properties of the PZT were studied. Firstly, the effects of samarium concentration and sintering temperature on the luminescence properties of BNT:Sm3 were studied. It was found that the luminescence properties increased with the increase of samarium concentration. The luminescence intensity of the concentration quenching effect decreases rapidly when the doping concentration is x = 0.015, and the sintering temperature also has a great effect on the luminescence properties. The sintering temperature increases with the increase of the sintering temperature in the range of 900 鈩

本文編號(hào)：1519527