通过对Fe3+-Bi3+-NO-3-H2O体系的热力学分析,确定了Bi3、Fe3共沉淀范围为pH =7～12.固定pH =11,采用共沉淀法制备了BiFeO3的前驱体,经过煅烧得到了单相BiFeO3粉体,并进行了粒度和晶体结构的研究.采用放电等离子烧结(spark plasma sintering,SPS)的方法制备出高密度单相BiFeO3陶瓷块材并测试了其介电性能和铁电性能.结果表明,陶瓷块材相对密度为96.7％;陶瓷块材在频率为30 MHz时,介电常数ε为91.9,介电损耗tanδ为0.017;陶瓷块材在室温时具有铁电性.在电场强度为30 kV/cm时,饱和极化强度Ps'=0.40 μC/cm2,剩余极化强度Pr'=0.17 μC/cm2,矫顽场强度EC=16 kV/cm.放电等离子烧结(SPS)出的陶瓷块材比传统常压烧结制备的陶瓷块材更加致密,介电和铁电性能更加优良.
参考文献
| [1] | 张琼,苗鸿雁,谈国强.BiFeO3薄膜研究进展[J].硅酸盐通报,2007(01):118-122. |
| [2] | Hua Ke;Wen Wang;Yuanbin Wang .Factors controlling pure-phase multiferroic BiFeO_3 powders synthesized by chemical co-precipitation[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2011(5):2192-2197. |
| [3] | Y. P. Wang;L. Zhou;M. F. Zhang;X. Y. Chen;J.-M. Liu;Z. G. Liu .Room-temperature saturated ferroelectric polarization in BiFeO_(3) ceramics synthesized by rapid liquid phase sintering[J].Applied physics letters,2004(10):1731-1733. |
| [4] | 陈熹,何永厚,陈龙胜.锰掺杂对铁酸铋结构和磁性的影响[J].华南理工大学学报（自然科学版）,2013(08):139-144. |
| [5] | MIAO Hongyan,ZHANG Qiong,TAN Guoqiang,ZHU Gangqiang.Co-precipitation/Hydrothermal Synthesis of BiFeO3 Powder[J].武汉理工大学学报（材料科学版）（英文版）,2008(04):507-509. |
| [6] | 陈险峙,周剑平.水热法制备BiFeO3粉体的工艺研究[J].硅酸盐通报,2013(09):1910-1915. |
| [7] | Wang, L.C.;Wang, Z.-H.;He, S.L.;Li, X.;Lin, P.T.;Sun, J.R.;Shen, B.G. .Enhanced magnetization and suppressed current leakage in BiFeO _3 ceramics prepared by spark plasma sintering of solgel derived nanoparticles[J].Physica, B. Condensed Matter,2012(8):1196-1202. |
| [8] | 周小兵,代建清,陈辉,蔡进红.Me-NaHCO3-NH3-H2O体系和Me-NaOH-NaHCO3-H2O体系的热力学分析[J].无机化学学报,2009(04):602-608. |
| [9] | H. Shokrollahi.Magnetic, electrical and structural characterization of BiFeO3 nanoparticles synthesized by co-precipitation[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2013:953-958. |
| [10] | M. Yasin Shami;M.S. Awan;M. Anis-ur-Rehman .Phase pure synthesis of BiFeO_3 nanopowders using diverse precursor via co-precipitation method[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2011(41):10139-10144. |
| [11] | Li Jin;Fei Li;Shujun Zhang .Decoding the Fingerprint of Ferroelectric Loops: Comprehension of the Material Properties and Structures[J].Journal of the American Ceramic Society,2014(1):1-27. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%