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首页> 外文期刊>Journal of Materials Research >Low-field dynamic magnetic alignment and templated grain growth of diamagnetic PMN-PT ceramics
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Low-field dynamic magnetic alignment and templated grain growth of diamagnetic PMN-PT ceramics

机译：抗磁性PMN-PT陶瓷的低场动态磁对准和模板生长

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摘要

A novel combination of low-field magnetic alignment (MA) and templated grain growth (TGG) was used to fabricate highly textured diamagnetic 0.72Pb(Mg_(1/3)Nb_(2/3))O_3-0.28PbTiO_3 (0.72PMN-0.28PT) ceramics. Samples were produced by nonaqueous slip casting of PMN-PT slurries, in which diamagnetic plate-like 0.4(Na_(1/2)Bi_(1/2))TiO_3-0.6PbTiO_3 (0.4NBT-0.6PT) template particles were aligned by dynamic MA in a 2.2-T permanent magnet array. Template alignment improved as slurry viscosity increased, with a 32-vol% solid loading (a viscosity of ～0.1 Pa s at 0.1 s~(-1)) giving optimal texture quality (7.85° FWHM,f＝ 92 vol%) after sintering and TGG. Alignment was stable for more than 3 h during slip casting, allowing fabrication of ～l-cm thick textured ceramics with high piezoelectric response (d_(33) ＝ 1222 pC/N). The success of dynamic MA at low magnetic field (2.2 T) is attributed to an increase in driving force for alignment of large (5-10 urn) template particles relative to the randomizing effect of Brownian motion (i.e., thermal energy k_BT).
机译：低场磁对准（MA）和模板化晶粒生长（TGG）的新颖组合被用于制造高织构抗磁0.72Pb（Mg_（1/3）Nb_（2/3））O_3-0.28PbTiO_3（0.72PMN- 0.28PT）陶瓷。通过非水滑模铸造PMN-PT浆料制备样品，其中抗磁板状0.4（Na_（1/2）Bi_（1/2）TiO_2_3-0.6PbTiO_3（0.4NBT-0.6PT）模板颗粒通过2.2-T永磁体阵列中的动态MA。模板排列随浆液粘度的增加而改善，固含量为32体积％（在0.1 s〜（-1）时粘度为〜0.1 Pa s），烧结后具有最佳的织构质量（7.85°FWHM，f ＝ 92 vol％）和TGG。在粉浆浇铸过程中，对准稳定超过3 h，可以制造出具有高压电响应（d_（33）＝ 1222 pC / N）的〜l-cm厚的纹理陶瓷。动态MA在低磁场（2.2 T）下的成功归因于相对于布朗运动的随机化效应（即热能k_BT），用于对齐大（5-10 um）模板颗粒的驱动力增加了。

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  • 来源
    《Journal of Materials Research》 |2013年第21期|2960-2969|共10页
  • 作者

    Stephen F. Poterala; Richard J. Meyer Jr.; L. Messing;

  • 作者单位

    Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802 and Now Channel Technologies Group, Santa Barbara, California 93111;

    Applied Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802 Gary;

    Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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