| 386 | 3 | 19 |
| 下载次数 | 被引频次 | 阅读次数 |
采用液相包覆法制备了结构致密的铌酸钾钠基[(K0.5Na0.5NbO3-K0.1Na0.4Bi0.5TiO3)-xLiNbO3,0≤x≤0.02]无铅压电陶瓷,研究了掺杂Li+对铌酸钾钠钛酸铋钾钠K0.5Na0.5NbO3-K0.1Na0.4Bi0.5TiO3(KNN-BNKT)晶体结构和压电、介电性能的影响。结果表明:当Li+含量在x取0～0.010(摩尔分数)时,陶瓷样品均形成了均一的钙钛矿型结构。Li+掺杂量对陶瓷压电、介电性能有很大的影响,其压电常数(d33)随着Li+掺杂量的增加先升高后降低,并在x=0.010的时候取得最大值。实验表明:当x=0.01时,(K0.5Na0.5NbO3-K0.1Na0.4Bi0.5TiO3)-xLiNbO3无铅压电陶瓷表现出较好的压电性能:d33=173pC/N,相对介电常数εr=620.745,介电损耗tanδ=0.0132,kp=27.35%,kt=26.34%,Qm=48.97。
Abstract：(1-x)(K0.5Na0.5NbO3-K0.1Na0.4Bi0.5TiO3)-xLiNbO3 lead-free piezoelectric ceramics were prepared by the HPLC method of coated.Effects of LiNbO3 on crystal structure and piezoelectric properties and Dielectric properties of the KNN-BKNT ceramics were investigated.The results reveal that KNN-BKNT ceramic samples doped with 0～0.02%(mole fraction)LiNbO3 possess pure perovskite structure.The dielectric and piezoelectric properties of the ceramics are affected obviously by the LiNbO3-doped amount.The piezoelectric constant(d33) with the increase in LiNbO3 doped first and then decreased,and when x=0.01 to obtain the maximum value.Experiments reveals that:The time when x=0.01,the lead-free piezoelectric ceramics show good piezoelectric properties: d33=173pC/N,the relative dielectric constant εr=620.745,dielectric loss tanδ=0.0132,kp=27.35%,kt=26.34%,Qm=48.97.
[1]Yiping Guo,Ken-ichi Kakimoto,Hitoshi Ohsato,et al.(Na0.5K0.5)NbO3-LiTaO3 lead-free piezoelectric ceramics[J].Materials Letters 59(2005)241-244
[2]唐福生,杜红亮,刘代军,等.(K0.5Na0.5)NbO3-LiNbO3无铅压电陶瓷的烧结特性和压电性能研究[J].无机材料学报.2007,22(2):323-327
[3]SAITO Y,TAKAO H,TAN T,et al.Lead-free piezoceramics[J].Nature.2004,432(7013):84-87
[4]吴浪,肖定全,赁敦敏等.LiNbO3改性KNN基无铅压电陶瓷的制备和性能[J].压电与声光.2008,30(4):483-486
[5]Cheol-Woo Ahn,Hwi-Yeol Park,Sahn Nahm,et al.Structural variation and piezoelectric properties of 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics[J].Sensors and Actuators A 136(2007)255-260
[6]Cheol-Woo Ahn,Sahn Nahm,Makarand Karmark ar,et al.Effect of CuO and MnO2 on sintering temperature,microstructure,and piezoelectric properties of 0.95(K0.5Na0.5)NbO3-0.05BaTiO3 ceramics[J].Materials Letters 62(2008)3594-3596
[7]Yuan Zhou,Min Guo,Ci Zhang,et al.Hydrothermal synthesis and piezoelectric property of Ta-doping K0.5Na0.5NbO3 lead-free piezoelectric ceramic[J].Ceramics International 35(2009)3253-3258
[8]Evelyn Hollenstein,Dragan Damjanovic,Nava Setter,et al.Temperature stability of the piezoelectric properties of Li-modi ed KNN ceramics[J].Journal of the European Ceramic Society 27(2007)4093-4097
[9]明保全,王矜奉,臧国忠等.铌酸钾钠基无铅压电陶瓷的X射线衍射与相变分析[J].物理学报.2008,57(9):5962-5967
[10]刘代军,杜红亮,唐福生等.氧化铋掺杂对铌酸钾钠无铅压电陶瓷性能的影响[J].硅酸盐学报.2007,35(9):1141-1145
[11]赵高磊,张海龙,张波.气氛烧结锂掺杂铌酸钾钠无铅压电陶瓷的电学性能[J].材料导报.2010,24(5):4-6
[12]冯斌,晋勇,肖定全等.高锂含量碱金属铌酸盐的结构与性能研究[J].压电与声光.2007,29(6):663-665
[13]GUO Y,KAKIMOTO K,OHSATO H.Phase transitional behavior and piezoelectric properties of(Na0.5K0.5)NbO3-LiNbO3 ceramics[J].Appl Phys Lett,2004,85(18):4121-4123
[14]高峰,张慧君,刘向春等.铌酸钠钾基无铅压电陶瓷的相结构与压电性能[J].压电与声光.20 06,28(1):60-63
基本信息:
DOI：10.16521/j.cnki.issn.1001-9642.2011.05.004
中图分类号:TM282
引用信息:
[1]何航,李珍,刘立峰.锂掺杂KNN-BNKT无铅压电陶瓷性能研究[J].中国陶瓷,2011,47(05):30-33+67.DOI:10.16521/j.cnki.issn.1001-9642.2011.05.004.
2011-05-05
2011-05-05