Pinning behavior in bulk MgB2 prepared using boron powder refined via high-energy ultra-sonication

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00545185" target="_blank" >RIV/68378271:_____/21:00545185 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0321944" target="_blank" >http://hdl.handle.net/11104/0321944</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10948-021-05885-z" target="_blank" >10.1007/s10948-021-05885-z</a>

Result language
angličtina
Original language name
Pinning behavior in bulk MgB2 prepared using boron powder refined via high-energy ultra-sonication
Original language description
We successfully refined a cheap commercial boron powder by means of high-energy ultra-sonication and utilized it in synthesis of bulk MgB2. Rietveld phase analysis of X-ray diffraction pattern revealed completely formed MgB2 with a low amount of MgO. MgB2 bulk prepared of boron ultra-sonicated in ethanol for 15 min showed self-field Jc of around 300 kA/cm2 at 20 K without any compromise in Tc (~39 K). Pinning analysis based on Dew-Hughes expression showed major pinning contribution from grain-boundary pinning (~95.5%), along with a slight contribution from point pinning (4.5%). The microstructure study detected a system of large MgB2 grains (hundreds nm large) and 10–20 nm sized particles, possibly Mg-B-O, formed at MgB2 grain boundaries.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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