Superconducting properties of sintered bulk MgB2 prepared from hexane-mediated high-energy-ultra-sonicated boron

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00541847" target="_blank" >RIV/68378271:_____/21:00541847 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.mseb.2020.115030" target="_blank" >https://doi.org/10.1016/j.mseb.2020.115030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mseb.2020.115030" target="_blank" >10.1016/j.mseb.2020.115030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Superconducting properties of sintered bulk MgB2 prepared from hexane-mediated high-energy-ultra-sonicated boron

Popis výsledku v původním jazyce

Recently, novel low cost techniques have been employed to improve critical current density of MgB2. Ultra-sonication is one such technique. We report on the influence of hexane dispersant on particle size of ultra-sonicated cheap commercial boron and the superconducting properties of MgB2 bulks prepared using this new precursor. XRD showed major peaks corresponding to MgB2, with small fractions of MgO and unreacted Mg. Tc was close to 39 K, with a sharp transition. The highest Jc was found in the sample with boron ultra-sonicated for 30 min as high as 375, 328, and 270 kA/cm2 at 10, 15, and 20 K, respectively. SEM analysis revealed tiny particles and layers randomly dispersed in the microstructure, while EDX indicated that these particles were secondary phases of Mg, B, and O. Flux pinning diagrams showed the peak of normalized pinning force located close to b = 0.2, depicting dominance of grain boundary pinning mechanism.

Název v anglickém jazyce

Superconducting properties of sintered bulk MgB2 prepared from hexane-mediated high-energy-ultra-sonicated boron

Popis výsledku anglicky

Recently, novel low cost techniques have been employed to improve critical current density of MgB2. Ultra-sonication is one such technique. We report on the influence of hexane dispersant on particle size of ultra-sonicated cheap commercial boron and the superconducting properties of MgB2 bulks prepared using this new precursor. XRD showed major peaks corresponding to MgB2, with small fractions of MgO and unreacted Mg. Tc was close to 39 K, with a sharp transition. The highest Jc was found in the sample with boron ultra-sonicated for 30 min as high as 375, 328, and 270 kA/cm2 at 10, 15, and 20 K, respectively. SEM analysis revealed tiny particles and layers randomly dispersed in the microstructure, while EDX indicated that these particles were secondary phases of Mg, B, and O. Flux pinning diagrams showed the peak of normalized pinning force located close to b = 0.2, depicting dominance of grain boundary pinning mechanism.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Science and Engineering B-Advanced Functional Solid-State Materials

ISSN

0921-5107

e-ISSN

1873-4944

Svazek periodika

265

Číslo periodika v rámci svazku

Mar

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

115030

Kód UT WoS článku

000615944000004

EID výsledku v databázi Scopus

2-s2.0-85098848515