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溶胶-凝胶法合成导电SrVO3 粉末
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四川大学 材料科学与工程学院,四川 成都 610065

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四川省重大科技专项项目(Grant No. 2020ZDZX0008,2020YFG0465),四川大学博士后基金项目(Grant No. 2021SCU12060)


Conductive SrVO3 Powders Synthesized by Sol-Gel Method
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College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China

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Program of Sichuan Province Science and Technology Project (2020ZDZX0008, 2020YFG0465); Program of Postdoctoral Science Foundation of Sichuan University (2021SCU12060)

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    摘要:

    通过溶胶-凝胶法结合热处理合成了导电SrVO3粉末。在溶胶配制过程,对Sr:V摩尔比进行精确调控,再通过对凝胶热分解行为的表征,确定其煅烧温度和除去残余碳,从而获得前驱体粉末,再将其在H2中还原以获得最终产物。研究了煅烧温度、Sr:V摩尔比对产物形貌、结构和组成的影响,并采用标准直流四探针技术对样品的电导率进行测试。结果表明,当Sr:V摩尔比为1:1.06,煅烧温度500 ℃,再在850 ℃氢气还原,可以制备没有残余碳或钒的氧化物杂质的单相SrVO3粉末。SrVO3粉末的电导率达到714.3 S/cm,比石墨粉末的电导率(500 S/cm)高。

    Abstract:

    Conductive SrVO3 powders were synthesized by sol-gel method combined with subsequent heat treatment. The molar ratio of Sr:V was adjusted during the sol process. The thermal behavior of the gel was analyzed to figure out the calcination temperature in order to get the precursors without residual carbon, and then the gel was reduced in H2 to obtain the final products. The influence of temperature and molar ratio of Sr:V on the morphologies, structures and compositions was researched. The conductivity of the samples was tested by standard dc four-probe technology. The results show that when the molar ratio of Sr:V=1:1.06, the calcination temperature is 500 °C and reduction temperature is 850 °C in H2, the SrVO3 powers without the impurities of residual carbon or vanadium oxides can be obtained. The electrical conductivity of SrVO3 powders reaches 714.3 S/cm, while that of graphite powders is about 500 S/cm.

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欧阳林峰,杨晓娇,李小磊,杜义波,林紫峰,刘颖.溶胶-凝胶法合成导电SrVO3 粉末[J].稀有金属材料与工程,2022,51(6):2039~2045.[Ouyang Linfeng, Yang Xiaojiao, Li Xiaolei, Du Yibo, Lin Zifeng, Liu Ying. Conductive SrVO3 Powders Synthesized by Sol-Gel Method[J]. Rare Metal Materials and Engineering,2022,51(6):2039~2045.]
DOI:10.12442/j. issn.1002-185X.20210338

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  • 收稿日期:2021-04-17
  • 最后修改日期:2021-05-27
  • 录用日期:2021-05-27
  • 在线发布日期: 2022-06-29
  • 出版日期: 2022-06-29