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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of SiO2 on sintering and dielectric properties of CaCu3Ti4O12 nanofibers
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Effect of SiO2 on sintering and dielectric properties of CaCu3Ti4O12 nanofibers

机译：SiO2对CaCu3Ti4O12纳米纤维烧结及介电性能的影响

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The effect of SiO2 on sintering and dielectric properties of CaCu3Ti4O12 nanofibers were synthesized from the CaO-Cu2O-TiO2 and CaO-Cu2O-TiO2-SiO2 systems by a solegel electrospinning technique using polyvinylpyrrolidone was studied. Sintering temperature and morphology of CaCu3Ti4O12 nanofibers resulted largely dependent on selected system. SEM observations demonstrated that polycrystalline thinner CaCu3Ti4O12 nanofibers that could be obtained from the CaO-Cu2O-TiO2 system after sintering at 900 degrees C for 4 h. The electrospinning of the CaO-Cu2O-TiO2-SiO2 system lowered the sintering temperature of CCTO nanofiber to 800 degrees C. Novel composites based on doped or undoped CCTO fibers and Poly methyl methacrylate (PMMA) resin were prepared for measuring the dielectric constant of CCTO fibers. The calculated dielectric constant of pure (undoped) CCTO nanofibers were prepared in CaO-Cu2O-TiO2 system was about 148 at 103 Hz. An interesting phenomenon was found that CCTO fiber has different dielectric constant from CCTO bulk ceramic. Also, CCTO/PMMA composites containing doped CCTO fibers showed lower dielectric loss. (C) 2016 Elsevier B.V. All rights reserved.
机译：研究了SiO2对CaO-Cu2O-TiO2和CaO-Cu2O-TiO2-SiO2体系的烧结和介电性能的影响。 CaCu3Ti4O12纳米纤维的烧结温度和形态在很大程度上取决于所选择的体系。 SEM观察表明，在900摄氏度下烧结4 h后，可以从CaO-Cu2O-TiO2系统中获得多晶的，较薄的CaCu3Ti4O12纳米纤维。 CaO-Cu2O-TiO2-SiO2系统的电纺将CCTO纳米纤维的烧结温度降低到800摄氏度。制备了基于掺杂或不掺杂CCTO纤维和聚甲基丙烯酸甲酯（PMMA）树脂的新型复合材料，用于测量CCTO的介电常数纤维。在CaO-Cu2O-TiO2系统中制备的纯（未掺杂）CCTO纳米纤维的介电常数为103 Hz时约为148。发现了一个有趣的现象，CCTO纤维的介电常数与CCTO块状陶瓷的介电常数不同。同样，包含掺杂CCTO纤维的CCTO / PMMA复合材料显示出较低的介电损耗。 （C）2016 Elsevier B.V.保留所有权利。

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