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KTa_(1-x)Nb_xO_3三组分复合热释电薄膜的制备与性能研究
作者:吴会光 王世敏 傅晶 张刚升 
单位:湖北大学化学与材料科学学院 湖北大学化学与材料科学学院 湖北大学化学与材料科学学院 湖北大学化学与材料科学学院 武汉430062  武汉430062  武汉430062  武汉430062 
关键词:钽铌酸钾  多组分复合薄膜  热释电性能 
分类号:TB43
出版年,卷(期):页码:2002,30(4):482-485
DOI:
摘要:
利用多组分复合宽化铁电相变温区 ,使薄膜以高的热释电系数出现在较宽的温度范围。在BaTiO3/Pt/Ti/SiO2 /Si衬底上用溶胶 -凝胶法制备了 0 .5 μmKTa1 -x NbxO3(x =0 .45 ,0 .5 0 ,0 .5 5 )三组分等厚度的复合薄膜。 0 .5 μmKTN -0 .0 8μmBT薄膜在 2 8~ 72℃温度范围内 ,1.0kHz时 ,其εr=110 0 ,tanδ =1.2 %。在室温及 12 0kV/cm下极化 3 0min后 ,0 .5 μm复合薄膜在 2 8~72℃温度范围内热释电系数出现峰值 ,平均热释电系数 p =2 .7× 10 - 6 C/cm2 ·K ,电压响应优值Fv=8.99× 10 - 1 0 C·cm/J ,探测度优值Fd=2 7.0× 10 - 8C·cm/J,该薄膜工作温度范围很宽 ,是一种优异的热释电材料。
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Thin films of multicomposition composite KTa 1- x Nb x O 3( x =0.45,0.50,0.55) for high pyroelectric coefficient and with wider temperature range were prepared by sol-gel method on BaTiO 3/Pt/Ti/SiO 2/Si substrates. The relative permittivity and dielectric loss of the composite films KTa 1- x Nb x O 3 0.5 μm thick-BaTiO 3 0.08 μm thick are 1 100 and 0.012 at 1.0 kHz in the temperature range from 28 ℃ to 72 ℃respectively. After polarizing in a field intensity of 120 kV/cm at room temperature, the 0.5 μm thick composite films exhibit an excellent pyroelectric behavior with an average pyroelectric coefficient of 2.7×10 -6 C/cm 2·K in above temperature range and optimal values of voltage response and detectivity of 8.99×10 -10 C·cm/J and 27.0×10 -8 C·cm/J respectively.
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基金项目:
国家自然科学基金资助项目 (5 9972 0 0 8)~~
作者简介:
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参考文献:
[1] 王世敏,张刚升,李佐宜,等(WANGShimin,etal).KTa0.55·Nb0.45O3薄膜的介电和铁电及热释电性能研究[J].硅酸盐学报(JChinCeramSoc),1999,27(6):678—684. [2] STAFSUDDOM ,PINESMY .CharacteristicsofKTNpyro electricdetectors[J].JOptSocAm,1972,62:1153—1156. [3] 竹中正.高机能焦电材料[J].ェレクトロニク·セラミケス(ElectronicCeramics),1991,22(106):33—40. [4] 关振铎,张中太,焦金生(GUANZhentuo,etal).无机材料物理性能(PhysicalPropertiesofInorganicMaterials)[M ].北京:清华大学出版社(Beijing:TsinghuaUniversityPress),1992.487—546. [5] PATELA ,SHORROCKSN ,WhatmoreR .Physicochemicalpropertiesofsol-gelderivedleadscandiumtantalatePb(Sc0.5·Ta0.5)O3thinfilms[J].Ferroelectrics,1992,134:343—348. [6] SHORROCKSN ,PATELA ,WHATMORER .Pyroelectricpropertiesofthinfilmleadscandiumtantalite[J].Ferroelectrics,1992,133:35—40. [7] 孙大志,林盛卫,王永令(SUNDazhi,etal).多组分复合的热释电陶瓷材料[J].无机材料学报(JInorgMater),1995,10(1):117~119. [8] HEUERMANNB ,BALLERF ,BLACHNIKR .CrystalgrowthandcharacterizationofK(Ta1-xNbx)O3solidsolutions[J].Ther mochemActa,1990,60:71—74. [9] WANGShimin,ZHOUTaosheng,WANGLonghai,etal.PreparationofhighlyorientedKTN/SrTiO3(111),KTN/Sr·TiO3(100)thinfilmsbysol_gelmethod[J].Ferroelectrics,1997,195:259—263.
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