Yun Zhang, S. Soltanian, Yue Zhao, Sihai Zhou, S. Dou
{"title":"Effect of addition of TiO2/SiO2 nanoparticles on Hc2 and Hirr in MgB2 bulks","authors":"Yun Zhang, S. Soltanian, Yue Zhao, Sihai Zhou, S. Dou","doi":"10.1109/ICONN.2008.4639255","DOIUrl":null,"url":null,"abstract":"In this paper, MgB<sub>2</sub> bulks were prepared with doped TiO<sub>2</sub> nanoparticles surface-modified by 5-10% SiO<sub>2</sub>. Quantitative X-ray diffraction (XRD) analysis was performed to obtain the weight fraction of impurities using the Rietveld method. The effects of addition of TiO<sub>2</sub>/SiO<sub>2</sub> nanoparticles on the critical temperature (T<sub>c</sub>), the upper critical field (H<sub>c2</sub>), and the irreversibility field (H<sub>irr</sub>) as a function of doping rates at 750degC are reported. It has been found that the addition of TiO<sub>2</sub>/SiO<sub>2</sub> nanoparticles resulted in small depressions in T<sub>c</sub>, while the Hc<sub>2</sub> and H<sub>irr</sub> performances were improved due to TiO<sub>2</sub>/SiO<sub>2</sub> nanoparticle doping.","PeriodicalId":192889,"journal":{"name":"2008 International Conference on Nanoscience and Nanotechnology","volume":"189 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2008-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2008 International Conference on Nanoscience and Nanotechnology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICONN.2008.4639255","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, MgB2 bulks were prepared with doped TiO2 nanoparticles surface-modified by 5-10% SiO2. Quantitative X-ray diffraction (XRD) analysis was performed to obtain the weight fraction of impurities using the Rietveld method. The effects of addition of TiO2/SiO2 nanoparticles on the critical temperature (Tc), the upper critical field (Hc2), and the irreversibility field (Hirr) as a function of doping rates at 750degC are reported. It has been found that the addition of TiO2/SiO2 nanoparticles resulted in small depressions in Tc, while the Hc2 and Hirr performances were improved due to TiO2/SiO2 nanoparticle doping.
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