本文選題：鼓包法　切入點：PZT　出處：《湘潭大學(xué)》2015年碩士論文

【摘要】：壓電、鐵電材料在國防、電子、工業(yè)等方面有著廣泛的應(yīng)用,對高科技新型產(chǎn)業(yè)的發(fā)展具有重大影響。鐵電材料的關(guān)鍵參數(shù)及力電失效機制的分析對提高材料的應(yīng)用范圍以及其可靠性具有至關(guān)重要的意義。本文首先發(fā)展了一種基于鼓包法的鐵電材料力電本構(gòu)測試模型,可用于測試力電耦合作用下新型鐵電材料的彈性剛度系數(shù)、壓電系數(shù)和彈性模量;自主完善了鼓包實驗測試系統(tǒng),完成了PZT-4壓電陶瓷、PZT薄膜和PVDF薄膜材料的力電耦合鼓包測試,并獲得了以上三種材料的彈性剛度系數(shù)、壓電系數(shù)和彈性模量;進一步分析了在不同力電耦合作用下材料的電滯回線特征,討論了剩余極化、矯頑場、飽和極化三個關(guān)鍵參數(shù)的演變情況。具體工作內(nèi)容如下:第一,建立了鐵電材料鼓包斷裂測試的本構(gòu)模型�；趥鹘y(tǒng)的鼓包法,對鐵電材料的鼓包測試模型進行推導(dǎo)。以鐵電陶瓷為例,根據(jù)材料的特性結(jié)合其系數(shù)矩陣以及傳統(tǒng)鼓包法的力學(xué)模型,對力電耦合作用下鐵電陶瓷的本構(gòu)方程進行推導(dǎo),得到了在力電耦合作用下鐵電材料的鼓包模型,進而得到鐵電陶瓷的彈性剛度常數(shù)以及壓電系數(shù)。該模型可用于測試新型鐵電及鐵電復(fù)合材料在力電耦合下的性能參數(shù),為測量新型鐵電材料的性能提供一種實驗測試手段。第二,利用改進的鼓包力電耦合測試裝置分析了商業(yè)化PZT-4陶瓷片的力電耦合性能。根據(jù)不同電場強度下材料的壓力-撓度曲線,結(jié)合鼓包力電耦合模型得到PZT-4陶瓷片的彈性剛度系數(shù)13c的值為10 212.56′10 N m。結(jié)合實驗數(shù)據(jù)對壓電系數(shù)13e進行計算,結(jié)果表明壓電系數(shù)13e的值隨著外加電壓的增加而減小。對不同電壓下的電滯回線進行測試,結(jié)果表明:隨著外加壓力的增加電滯回線變得扁平,其剩余極化強度、最大極化強度減小,矯頑場的值增大。同時得到PZT-4陶瓷片的彈性模量的值為72.27 GPa,殘余應(yīng)力的值為51.72 MPa。第三,利用改進的鼓包力電耦合測試裝置分析了PZT[Pb(Zr0.52Ti0.48)O3鐵電薄膜的力電耦合性能。首先在不同壓力下對PZT薄膜的電滯回線進行測量,結(jié)果表明:隨著壓力的增加,薄膜材料的剩余極化強度減小,而矯頑場呈現(xiàn)增大的趨勢。測量不同外加電場下PZT薄膜的壓力-撓度曲線,得到不同電壓下PZT薄膜的彈性模量隨著電壓的變化關(guān)系。結(jié)果表明:當(dāng)電壓從0 V增加到14 V,PZT鐵電薄膜彈性模量值從3.29 GPa增加到5.02 GPa。第四,利用改進的鼓包力電耦合測試裝置分析了聚偏氟乙烯(PVDF)高分子鐵電聚合物薄膜的力電耦合性能。首先測試了不同壓力下PVDF薄膜的壓力-撓度曲線,得到其彈性模量的平均值為1.93 GPa。測試不同電壓下PVDF薄膜的壓力-撓度曲線,分析了PVDF有機薄膜的力電響應(yīng)行為。計算得到PVDF鐵電聚合物薄膜的彈性剛度常數(shù)的值c12=1.02×10~9N/m2。并得到壓電常數(shù)隨電壓的變化關(guān)系,結(jié)果表明;當(dāng)電壓為20 V、50 V以及150 V時,壓電常數(shù)從2-0.466 C/m減小到了2-0.013 C/m,這一結(jié)果說明外加電場和雙軸拉伸應(yīng)力的共同作用對鐵電聚合物薄膜的壓電性能產(chǎn)生了很大影響。
[Abstract]:Piezoelectric, ferroelectric materials in electronic defense, and is widely used in industry and so on, has great influence on the development of new high-tech industry. Analysis of key parameters of ferroelectric materials and force electricity failure mechanism has important significance to improve the application range of materials and its reliability. This paper develops a kind of this the test model of ferroelectric material force bulge on the basis of the method can be used to test the mechanical and electrical coupling model of ferroelectric materials under the elastic stiffness coefficient, piezoelectric coefficient and elastic modulus; self perfect bulge test system, completed the PZT-4 piezoelectric ceramics, PZT film and PVDF film material force electric coupling bulge test, and obtained more than three kinds of materials of the elastic stiffness coefficient, piezoelectric coefficient and elastic modulus; further analysis in Tongli electric coupling hysteresis characteristics of materials, discusses the remanent polarization, the The coercive field, the evolution of the three key parameters of saturated polarization. The specific work is as follows: first, the establishment of the constitutive model of ferroelectric materials bulge fracture test. The traditional drum kit method based on ferroelectric materials bulge test model was derived. The ferroelectric ceramics as an example, according to the combination of the coefficient matrix and the traditional the mechanical model of drum characteristics of material, the mechanical and electrical coupling constitutive equation of ferroelectric ceramics is obtained under the package model of ferroelectric materials in the drum force electric coupling, and ferroelectric ceramics, elastic stiffness constants and piezoelectric coefficient. The model can be used to test the performance parameters a new ferroelectric and ferroelectric composites in mechanical and electrical coupling, provides a test method for performance measurement model of ferroelectric materials. Second, using the improved bulging force electric coupling test device of commercial PZT-4 ceramic plate Electromechanica performance. According to the material under different electric field strength stress deflection curve, combined with the electric coupling model of PZT-4 ceramic elastic stiffness coefficient 13C value is 10212.56 '10 N M. according to the experimental data to calculate the piezoelectric coefficient 13e of bulging force, results show that the piezoelectric coefficient 13e decreases with the increase of the applied voltage. Test of hysteresis loops under different voltage. The results show that with the increase of the external pressure hysteresis becomes flat, the remnant polarization strength, reduce the maximum polarization, increase the value of coercive field. At the same time get the elastic modulus of PZT-4 ceramics the value was 72.27 GPa, residual stress the value is 51.72 MPa. third, using the improved bulging force electric coupling test device of PZT[Pb (Zr0.52Ti0.48) electromechanical coupling properties of O3 ferroelectric thin film. Firstly, under different pressure on PZT thin film hysteresis loop measurement, The results show that with the increase of pressure, reduce the residual polarization of thin film materials, and the coercivity increases. Measurement of PZT films under different external electric field stress deflection curve, the elastic modulus of PZT films under different voltage with voltage changes. The results show that when the voltage increased from 0 V to 14 V, PZT thin film elastic modulus increased from 3.29 GPa to 5.02 GPa. fourth, using the improved bulging force electric coupling test device of polyvinylidene fluoride (PVDF) electromechanical coupling properties of polymer ferroelectric polymer films. First, PVDF thin films were tested under different pressure stress deflection curve, the average value of the elasticity modulus is 1.93 GPa. PVDF thin films under different voltage stress deflection curve, analysis of PVDF organic thin film force electrical response behavior. The calculated PVDF ferroelectric polymers film elastic stiffness constant value C12=1.02 * 10~9N/m2. and the piezoelectric constant with the voltage dependence results; when the voltage is 20 V, 50 V and 150 V, the piezoelectric constant C/m from 2-0.466 reduced to 2-0.013 C/m, the results show that the combined action of the applied electric field and the biaxial tensile stress has a great influence on the properties of piezoelectric the ferroelectric polymer films.

【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB34

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