采用溶胶-凝胶法制备出(Ba0．9 Ca0．1)(Zr0．15 Ti0．85)O3(简称BCT-BZT)粉体,并采用两段式传统烧结法用较低的烧结温度(1290℃)制备了该无铅压电陶瓷,运用热重差示扫描测量法分析了反应过程.X射线衍射测试结果表明,BCT-BZT粉体和陶瓷均是典型的钙钛矿结构,根据谢乐公式计算出粉体的晶粒尺寸约为32 nm.此外,室温下利用 TF Analyzer 2000铁电分析仪测得该陶瓷的介电常数高达6134,居里温度约为95℃,最大压电系数d33达到263 pm/V.利用此方法制备的 BCT-BZT 无铅压电陶瓷,其烧结温度与固相反应法相比降低了约200℃左右,同时还保持了良好的压电性能,从而降低了烧结成本,有利于实现该陶瓷的大规模工业化生产.
The (Ba0.9 Ca0.1 )(Zr0.15 Ti0.85 )O3 powders had been successfully prepared by sol-gel method,and the BCT-BZT lead free piezoelectric ceramics were obtained by traditional two-step sintering method under lower temperature (1 290 ℃).The reaction process was analyzed with the help of the thermo gravimetric and differen-tial scanning calorimetry.X-ray diffraction results showed that the structure of the BCT-BZT powders and ce-ramics were typical perovskite structure and the particle size was approximately 32 nm by Scherrer calculation. Moreover,the dielectric constant of ceramic was 6 134 at the room temperature by TF analyzer 2 000;the Curie temperature was about 95 ℃.Especially,the piezoelectric response loops revealed that the maximum piezoelec-tric coefficient d33 reached 263 pm/V.We successfully get BCT-BZT lead-free piezoelectric ceramics by the method,the sintering temperature was about 200 ℃ lower than the solid phase reaction method,maintaining the good piezoelectric properties and reducing the sintering costs.So,it was conducive to realizing the large-scale industrial production of ceramics.
参考文献
| [1] | Li L Y;Tang X G .Effect of electric field on the dielectric properties and ferroelectric phase transition of sol-gel de-rived(Ba0.90 Ca0.10)TiO3 ceramics[J].Materials Chemis-try and Physics,2009,115(2-3):507-511. |
| [2] | Lines M E.Principles and applications of ferroelectrics and related materials[M].Oxford:Clarendon Press,1977 |
| [3] | X.G. Tang;K.-H. Chew;H.L.W. Chan .Diffuse phase transition and dielectric tunability of Ba(Zr_yTi_(1-y)O_3 relaxor ferroelectric ceramics[J].Acta materialia,2004(17):5177-5183. |
| [4] | Q.X. Liu;X.G. Tang;Y.Y. Deng;J. Wang;H.L.W. Chan .Nonlinear Dielectric Properties Of Sol-gel Derived (ba,sr)tio_3 Ceramics[J].Materials Chemistry and Physics,2008(1):281-284. |
| [5] | Tang X G;Chew K H .Dielectric tunability of Ba0.90 Ca0.10 Ti0.75 Zr0.25 O3 ceramics[J].Applied Physics Letters,2004,85:991. |
| [6] | Liu W F;Ren X B .Large piezoelectric effect in Pb-free ceramics[J].Physical Review Letters,2009,103:257602. |
| [7] | Li, W;Xu, ZJ;Chu, RQ;Fu, P;Zang, GZ .Piezoelectric and Dielectric Properties of (Ba_(1-x)Cax)(Ti_(0.95)Zr_(0.05))O_3 Lead-Free Ceramics[J].Journal of the American Ceramic Society,2010(10):2942-2944. |
| [8] | Wu Jiagang;Xiao Dingquan;Wu Wenjuan et al.Effect of dwell time during sintering on piezoelectric properties of(Ba0.85 Ca0.15)(Ti0.90 Zr0.10)O3 lead-free ceramics[J].Jour-nal of Alloys and Compounds,2011,509:L359-L361. |
| [9] | R. Kavian;A. Saidi .Sol-gel derived BaTiO_3 nanopowders[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):528-532. |
| [10] | 王疆瑛,李姚熹,张良莹.钛酸锶钡（BaxSr1-xTiO3）陶瓷制备及其介电性能的研究[J].功能材料,2004(02):212-213,217. |
| [11] | Tangwiwat S;Milne SJ .Barium titanate sols prepared by a diol-based sol-gel route[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2005(12/13):976-980. |
| [12] | Zhang H;Deng X Y;Li T et al.Extrinsic effects on di-electric response of ultrafine grain BaTiO3 ceramics[J].Applied Physics Letters,2010,97:162913. |
| [13] | Gao Feng;Dong Xianlin;Mao Chaoliang.Energy-storage properties of 0.89Bi0.5 Na0.5 TiO3-0.06BaTiO3-0.05 K0.5 Na0.5 NbO3 lead-free anti-ferroelectric ceramics[J].Journal of the American Ceramic Society,2011(03):1-5. |
| [14] | Li Q L;Chen S T;Yao P et al.Thermal decomposition mechanism of the nano-BaTiO3 formation[J].Acta Physico-Chimica Sinica,2000,16(02):170-174. |
| [15] | Cheng H L .Preparation and dielectric properties of B-site doped barium titanate ceramics[D].Xi'an:North-west University,2008. |
| [16] | Elissalde C.;Ravez J. .Ferroelectric ceramics: defects and dielectric relaxations[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2001(8):1957-1967. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%