制备工艺对KNBT压电纤维结构与性能的影响
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摘要
采用固相法合成物相结构单一的KNBT陶瓷粉料,采用塑性聚合物-挤制成型法制备压电纤维素坯,研究泥料制备工艺和烧结工艺对KNBT压电纤维结构性能的影响。结果表明:真空炼泥和陈腐过程可以有效减少纤维中的孔洞,提高纤维致密度,改善其压电性能;采用混合气氛埋烧的烧结方式,在1110℃下烧结可以获得物相结构单一、结构致密、晶体结构良好的KNBT压电陶瓷纤维,压电纤维有效压电系数可达182 pm/V,矫顽场约为4.0 k V/mm,剩余极化强度约为25.5μC/cm~2。
In this paper, the KNBT ceramic powder with perovskite structure was preparated by solid-phase method. The green fibers were fabricated by VPP(viscous plastic processing)-extrusion method. Effect of the preparation technology on structure and properties of KNBT lead-free piezoelectric fibers were studied. The results show that, the vacuum pug-mill and ageing process can reduce the holes in fibers effectively, which can increase the density and piezoelectric properties of fibers. The KNBT piezoelectric fibers were sintered at 1100 ℃,which with pure perovskite structure and dense microstructure, and their effective piezoelectric constant reached 182 pm/V, remanent polarization is 25.5 μC/cm~2 and coercive field is 4.0 kV/mm.
In this paper, the KNBT ceramic powder with perovskite structure was preparated by solid-phase method. The green fibers were fabricated by VPP(viscous plastic processing)-extrusion method. Effect of the preparation technology on structure and properties of KNBT lead-free piezoelectric fibers were studied. The results show that, the vacuum pug-mill and ageing process can reduce the holes in fibers effectively, which can increase the density and piezoelectric properties of fibers. The KNBT piezoelectric fibers were sintered at 1100 ℃,which with pure perovskite structure and dense microstructure, and their effective piezoelectric constant reached 182 pm/V, remanent polarization is 25.5 μC/cm~2 and coercive field is 4.0 kV/mm.
引文
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[3] Ende E D,Wiel H J,Groen W A,et al.Direct Strain Energy Harvesting in Automobile Tires Using Piezoelectric PZT-Polymer Composites[J].Smart Materials and Structures,2012,21(1):015011.
[4] Su B,Button T W,Schneider A,et al.Embossing of 3D Ceramic Microstructures[J].Microsystem Technologies, 2002,8(2):359-362.
[5] Helbig J,Glaubitt W,Spaniol H,et al.Development and Technology of Doped Sol-Gel Derived Lead Zirconate Titanate Fibers[J].Smart Materials and Structures, 2003,12:987-992.
[6] Mai M F,Lin C,Xiong Z X,et al.Preparation and Characterization of Lead Zirconate Titanate Ceramic Fibers with Alkoxide-based Sol-Gel Route[J].Journal of Physics:Conference Series,2009,152:012077.
[7]李坤,李金华,李锦春,等.PLZT陶瓷纤维/环氧树脂1-3复合材料的制备和性能研究[J].无机材料学报,2004,19(2):361-366.
[8]徐玲芳,陈文,周静,等.锆钛酸铅镧压电陶瓷纤维的制备与性能[J].硅酸盐学报,2010,38(3):419-424.
[9]徐磊,周静,唐耀波,等.PMnS-PZN-PZT压电纤维的制备与铁电性能[J].硅酸盐学报,2010(8):1411-1414.
[10]杨桂华,周昌荣.BNT-BKT-BiFeO3无铅压电陶瓷的压电性能和退极化温度[J].人工晶体学报,2009,38(2):335-339.
[11]李月明,陈文,江向平,等.Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3系无铅压电陶瓷的极化工艺研究[J].中国陶瓷,2006,42(7):17-21.
[12] Li Y M,Chen W,Zhou J,et al.Dielectric and Ferroelectric Properties of Lead-freeNa0.5Bi0.5TiO3-K0.5Bi0.5TiO3Ferroelectric Ceramics[J]. Ceramics International,2005,31(1):139-14.
[13] Yang X,Zhou J,Zhang S,et al.Direct Measurement of Electric Field-induced Strains of a Single Lead Zirconate Titanate Piezoelectric Ceramic Fibre Under Various Conditions[J]. Ceramics International, 2015,41(1):1657-1662.