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首页> 外文期刊>Materials Chemistry and Physics >Reliability improvement of PMZNT relaxor ferroelectrics through surface modification by MnO_2 doping against electroplating-induced degradation
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Reliability improvement of PMZNT relaxor ferroelectrics through surface modification by MnO_2 doping against electroplating-induced degradation

机译：通过MnO_2掺杂进行表面改性以防止电镀引起的降解，从而提高PMZNT弛豫铁电体的可靠性

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摘要

Electroplating treatment, scanning electron microscopy (SEM) observation, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analyses were conducted to investigate the reliability improvement of lead magnesium niobate-based ceramics (PMZNT) through MnO2 vaporous doping against hydrogen reduction during electroplating. The results showed that manganese dopant was reduced to be +3 oxidation state during the sintering and Mn~(3+) was incorporated into the perovskite lattice; however, only the outermost ceramics surface was doped while 50 μm beneath kept unchanged. This technique proved to enhance the reliability of PMZNT against electroplating significantly without changing the dielectric properties of ceramics body. Based on the above results, the modification mechanism of MnO_2 vaporous doping was analyzed from the viewpoint of defect chemistry.
机译：进行了电镀处理，扫描电子显微镜（SEM）观察，X射线光电子能谱（XPS）和X射线衍射（XRD）分析，以研究通过MnO2气相掺杂对铌酸铅镁基陶瓷（PMZNT）的可靠性。电镀过程中的氢还原。结果表明，锰掺杂剂在烧结过程中还原为+3氧化态，Mn〜（3+）结合进入钙钛矿晶格中。但是，仅最外层陶瓷表面被掺杂，而下方的50μm保持不变。事实证明，该技术可显着提高PMZNT的抗电镀可靠性，而不会改变陶瓷体的介电性能。基于以上结果，从缺陷化学的角度分析了MnO_2气态掺杂的改性机理。

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