本文選題：無鉛壓電陶瓷 + 老化��； 參考：《寧波大學(xué)》2015年碩士論文

【摘要】：本文通過固相燒結(jié)法制備鈦酸鋇鈣無鉛壓電陶瓷,調(diào)研了Mn的不同位置取代摻雜對(duì)Ba0.77Ca0.23TiO3(BCT)無鉛壓電陶瓷老化性能的影響。實(shí)驗(yàn)結(jié)果表明,B位取代(Ba0.77Ca0.23)Ti0.99Mn0.01O3(BCT-B)陶瓷隨著老化時(shí)間的增加,在老化10天后有雙電滯回線,發(fā)生了老化現(xiàn)象,而A位取代(Ba0.77Ca0.23)0.99Mn0.01TiO3(BCT-A)陶瓷在老化10天后,電滯回線沒有明顯改變,并沒有發(fā)生老化現(xiàn)象。這是由于B位取代產(chǎn)生氧空位,而A位取代沒有產(chǎn)生氧空位。此外,由于老化后缺陷偶極子的定向排列,B位取代的無鉛壓電陶瓷電學(xué)性能發(fā)生變化,應(yīng)變減小,居里溫度升高1°C,壓電常數(shù)d33由91pC/N減小到80pC/N,機(jī)電耦合系數(shù)kp由22%下降到13%,品質(zhì)因數(shù)Qm由245增加到1500,介電常數(shù)和介電損耗也均有減小。本文研究了鈦酸鋇BaTiO3(BT)的燒結(jié)溫度,發(fā)現(xiàn)藥品純度與燒結(jié)時(shí)間對(duì)陶瓷制備有重要影響。最終發(fā)現(xiàn)BT陶瓷在1350°C下保溫4小時(shí),其壓電性能和鐵電性能比較好,根據(jù)老化因素的影響,發(fā)現(xiàn)BT也有老化現(xiàn)象。同時(shí),發(fā)現(xiàn)BT陶瓷有較弱的磁性,是一多鐵性材料。此外,本文還成功制備鋯鈦酸鋇鈣Ba0.85Ca0.15Zr0.1Ti0.9O3(BCZT),(Ba0.85Ca0.15)(Zr0.1Ti0.9)0.99Mn0.01O3(BCZT-Mn)和(Ba0.85Ca0.15)(Zr0.1Ti0.9)0.99Co0.01O3(BCZT-Co)陶瓷,測量BCZT陶瓷在頻率為1Hz下未老化和老化33天后的電滯回線,發(fā)現(xiàn)變化很小,沒有出現(xiàn)雙電滯回線。極化后的BCZT陶瓷介電溫譜顯示其居里溫度為85°C,在32°C時(shí)有峰出現(xiàn),表明此處存在四方-正交相變。BCZT-Mn陶瓷與BCZT-Co陶瓷相比,BCZT-Co陶瓷更容易老化。BCZT-Mn和BCZT-Co陶瓷均有磁性,且不同物質(zhì)取代其磁性不同。
[Abstract]:In this paper, barium calcium titanate lead-free piezoelectric ceramics were prepared by solid-state sintering. The effects of mn substitution doping on the aging properties of Ba0.77Ca0.23TiO3BCT-based lead-free piezoelectric ceramics were investigated.The experimental results show that the double electric hysteresis loop occurs after 10 days of aging with the increase of aging time, while the electric hysteresis line of Ba0.77Ca0.23Mn0.99Mn0.01Mn0.01O3BCT-A) ceramics does not change obviously after 10 days of aging, and the electric hysteresis line of BCT-BCT-A ceramics is not changed after 10 days of aging, but the electric hysteresis line of Ba0.77Ca0.23Mn0.99Mn0.99Mn0.99Mn0.01TiO3BCT-A) ceramics does not change obviously after 10 days of aging.There was no aging.This is due to the oxygen vacancy generated by the substitution of the B position and the absence of the oxygen vacancy by the substitution of the A position.In addition, due to the change of the electrical properties of the lead-free piezoelectric ceramics replaced by the directionally arranged dipoles at the B position of the defect after aging, the strain decreases.With the increase of Curie temperature by 1 擄C, the piezoelectric constant d33 decreases from 91pC/N to 80pC / N, the electromechanical coupling coefficient Kp decreases from 22% to 13, the quality factor QM increases from 245 to 1500, and the dielectric constant and dielectric loss decrease.The sintering temperature of barium titanate (BaTiO3BTO) was studied. It was found that the purity and sintering time of Batio _ 3O _ 3 had an important effect on the preparation of ceramics.Finally, it was found that the piezoelectric and ferroelectric properties of BT ceramics kept at 1350 擄C for 4 hours were better. According to the influence of aging factors, it was found that BT also had aging phenomenon.At the same time, it is found that BT ceramics have weak magnetic properties and are multi-iron materials.In addition, barium zirconium titanate calcium Ba0.85Ca0.15Zr0.1Ti0.9O3 BCZT-Mn0.85Ca0.15 (0.99Mn0.01O3O3BCZT-Mn) and Ba0.85Ca0.15Ti0.1Ti0.90.99Co0.01O3BCZT-Co) ceramics were successfully prepared. The electric hysteresis of BCZT ceramics was measured after 33 days of unaging and aging at the frequency of 1Hz.The dielectric temperature spectrum of polarized BCZT ceramics shows that the Curie temperature is 85 擄C, and the peak appears at 32 擄C. it indicates that the tetragonal orthorhombic phase transition. BCZT-Mn ceramics are more easily aged than BCZT-Co ceramics. BCZT-Mn and BCZT-Co ceramics have magnetic properties.And the magnetic properties of different substances are different.
【學(xué)位授予單位】：寧波大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ174.7

【共引文獻(xiàn)】

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2 ZHEN Yuhua;LI Jingfeng;;Effects of Ta Content and Sintering Temperature on Phase Composition,Microstructure and Electrical Properties of(Li,K,Na)(Nb_(1-x)Ta_x)O_3 Lead-free Piezoelectric Ceramics[J];Journal of the Chinese Ceramic Society;2014年02期

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1 Chun-hua GAO;Xin-you HUANG;Zhi-wen ZHU;;INFLUENCE OF BARIUM CONTENT ON THE PROPERTIES AND STRUCTURE OF LOW TEMPERATURE SINTERED BCZT LEAD-FREE PIEZOELECTRIC CERAMICS[A];2012全國壓電和聲波理論及器件技術(shù)研討會(huì)論文集[C];2012年

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4 馬家峰;高性能BCTZ基無鉛壓電陶瓷的改性與機(jī)理研究[D];中南大學(xué);2013年

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6 王大力;PNN-BS-PT與BT-CT-BH三元壓電陶瓷的相結(jié)構(gòu)及性能研究[D];哈爾濱工業(yè)大學(xué);2014年

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1 李璐;（Ba，，Ca）（Ti，Zr）O_3無鉛壓電陶瓷的制備與性能研究[D];景德鎮(zhèn)陶瓷學(xué)院;2013年

2 何世蛟;鉭鈮酸鉀鈉無鉛壓電單晶的生長及機(jī)電性能研究[D];哈爾濱工業(yè)大學(xué);2012年

3 周婧;無摻雜K_(0.5)Na_(0.5)NbO_3壓電陶瓷A位非化學(xué)計(jì)量比變化對(duì)其結(jié)構(gòu)的影響[D];哈爾濱工業(yè)大學(xué);2012年

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5 李麗;Pt/Bi_(3.15)Nd_(0.85)Ti_3O_(12)/Pt鐵電電容X射線輻照實(shí)驗(yàn)與TCAD模擬[D];湘潭大學(xué);2013年

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7 王薄笑天;BCZT無鉛壓電陶瓷的結(jié)構(gòu)設(shè)計(jì)與性能優(yōu)化[D];安徽理工大學(xué);2014年

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9 蒲俊;(Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.1))O_3基無鉛壓電材料制備與揚(yáng)聲器的研制[D];陜西師范大學(xué);2014年

10 肖婉平;高壓電介電性能、高耐壓KNN基無鉛壓電陶瓷研究[D];湖北大學(xué);2014年

本文編號(hào)：1763253