• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>CERAMICS INTERNATIONAL >High-voltage electrophoretic deposition of preferentially oriented films from multiferroic YMn2O5 nanopowders
【24h】

High-voltage electrophoretic deposition of preferentially oriented films from multiferroic YMn2O5 nanopowders

机译：多铁性YMn2O5纳米粉体的高压电泳沉积优先取向膜

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Processing of the YMn_2O_5 powder is very challenging, since it decomposes to YMnO_3 and Mn_3O_4 at temperatures close to 1180 °C, while samples consolidation commonly demands high temperatures. The main goal of this work is to investigate a possibility to prepare thick films of YMn_2O_5, since their deposition generally requires significantly lower temperatures. Multiferroic YMn_2O_5 was synthesized by the hydrothermal method from Y(CH_3COO)_3 ■ xH_2O, Mn(CH_3COO)_2 ? 4H_2O and KMnO_4 precursors. XRD, FE-SEM and TEM analysis showed that the obtained powder was monophasic, with orthorhombic crystal structure and columnar particle shape with mean diameter and length of around 20 and 50 nm, respectively. The obtained powder was suspended in isopropyl alcohol with addition of appropriate binder and deflocculant. This suspension was used for electrophoretic deposition of YMn_2O_5 thick films under the high-voltage conditions and electric fields ranging from 250 to 2125 V/cm. The films obtained at 1000 V/cm and higher electric fields showed good adhesion, particle packing, homogeneity and very low porosity. It was shown that the deposition in extremely high electric fields {K_C=22S V/cm) can influence the crystal orientation of the films, resulting in formation of preferentially oriented films.
机译：YMn_2O_5粉末的加工非常具有挑战性，因为它在接近1180°C的温度下会分解为YMnO_3和Mn_3O_4，而样品固结通常需要高温。这项工作的主要目的是研究制备YMn_2O_5厚膜的可能性，因为它们的沉积通常需要低得多的温度。通过水热法由Y（CH_3COO）_3合成多铁性YMn_2O_5■xH_2O，Mn（CH_3COO）_2？ 4H_2O和KMnO_4前体。 XRD，FE-SEM和TEM分析表明，所得到的粉末是单相的，具有正交晶体结构和柱状颗粒形状，平均直径和长度分别为20和50nm左右。将获得的粉末通过添加适当的粘合剂和抗絮凝剂而悬浮在异丙醇中。该悬浮液用于在高压条件下和电场范围为250至2125 V / cm的条件下电泳沉积YMn_2O_5厚膜。在1000 V / cm和更高电场下获得的薄膜表现出良好的附着力，颗粒堆积，均匀性和非常低的孔隙率。结果表明，在极高的电场（K_C = 2 2S V / cm）中的沉积会影响薄膜的晶体取向，从而形成优先取向的薄膜。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号