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首页> 外文期刊>Materials Science and Engineering >Pyrochlore free 0.67PMN-0.33PT ceramics prepared by particle-coating method
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Pyrochlore free 0.67PMN-0.33PT ceramics prepared by particle-coating method

机译:通过颗粒包覆法制备的无烧绿石的0.67PMN-0.33PT陶瓷

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摘要

In present study, pyrochlore-free 0.67Pb(Mg_(1/3)Nb_(2/3)O_3-0.33PbTiO_3 (0.67PMN-0.33PT) powders and ceramics have been successfully prepared. Using oxides as raw materials, pyrochlore-free 0.67PMN-0.33PT powders were obtained by two-step particle-coating method. The XRD and EDS results confirmed that the Mg-citric acid polymeric complex coatings effectively prevent the direct contact between PbO and Nb_2O_5 and thus avoid the formation of pyrochlore phase. The obtained pyrochlore-free 0.67PMN-0.33PT powders at 800 C showed uniform and even grain size. The 0.67PMN-0.33PT ceram ics sintered at 1150 ℃ for 2h exhibited 99% of relative density and a piezoelectric coefficient (d_(33)) of 576pC/N, a remnant polarization (P_r) of 28.4μC/cm~2, a planar electromechanical coupling factor (k_p) of 0.55 and a mechanical quality factor (Q_m) of 90.
机译:本研究成功制备了无烧绿石的0.67Pb(Mg_(1/3)Nb_(2/3)O_3-0.33PbTiO_3(0.67PMN-0.33PT)粉末和陶瓷,以氧化物为原料,无烧绿石通过两步粒子包覆法得到0.67PMN-0.33PT粉末,XRD和EDS结果证实,Mg-柠檬酸聚合物络合物涂层有效地防止了PbO与Nb_2O_5之间的直接接触,从而避免了烧绿石相的形成。所获得的不含烧绿石的0.67PMN-0.33PT粉末在800℃下表现出均匀的晶粒尺寸,在1150℃烧结2h的0.67PMN-0.33PT陶瓷具有相对密度的99%和压电系数(d_(33) )为576pC / N,残余极化(P_r)为28.4μC/ cm〜2,平面机电耦合系数(k_p)为0.55,机械品质因数(Q_m)为90。

著录项

  • 来源
    《Materials Science and Engineering》 |2012年第14期|p.1164-1171|共8页
  • 作者单位

    College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China;

    College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China;

    College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China;

    College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China;

    The State Key Lab of High Performance Ceramics and Superfinemicrostructure, Shanghai institute of Ceramics, Chinese Academy of Science, Shanghai 200050, People's Republic of China;

    College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ceramics; coatings; ferroelectricity;

    机译:陶瓷;涂料;铁电;

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