Tuning of grain boundaries in MgB2 by boron ultra-sonication in 2-propanol - A way to low-cost high-Jc bulk superconducting magnets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00572410" target="_blank" >RIV/68378271:_____/23:00572410 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0343247" target="_blank" >https://hdl.handle.net/11104/0343247</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2023.170146" target="_blank" >10.1016/j.jallcom.2023.170146</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tuning of grain boundaries in MgB2 by boron ultra-sonication in 2-propanol - A way to low-cost high-Jc bulk superconducting magnets

Popis výsledku v původním jazyce

Viscosity of solvent has been found to influence particle refinement during high-energy ultra-sonic treat-ment. 2-propanol, a solvent with viscosity ∼ 2.07 cP, was used to ultra-sonically refine boron powder. Unlike ball-milling, boron powder refined this way seem to be oxide free in nature as observed via X-ray diffraction (XRD). Field-emission scanning electron microscope (FE-SEM) showed a boron powder refinement up to nanoscale as well as morphological changes to the particles. FE-SEM of the bulk MgB2 fabricated from the ultra-sonically refined boron exhibited a principal MgB2 phase with scarce impurities of MgO. Lattice parameters ‘a’ and ‘c’ calculated from XRD patterns remained constant around 3.086 and 3.523 Å respectively, ruling out any carbon intrusion from solvent into bulks. Simultaneously all the bulks had Tc,onset around 38.5 K, with a sharp transition (ΔTc ∼ 0.5 K).

Název v anglickém jazyce

Tuning of grain boundaries in MgB2 by boron ultra-sonication in 2-propanol - A way to low-cost high-Jc bulk superconducting magnets

Popis výsledku anglicky

Viscosity of solvent has been found to influence particle refinement during high-energy ultra-sonic treat-ment. 2-propanol, a solvent with viscosity ∼ 2.07 cP, was used to ultra-sonically refine boron powder. Unlike ball-milling, boron powder refined this way seem to be oxide free in nature as observed via X-ray diffraction (XRD). Field-emission scanning electron microscope (FE-SEM) showed a boron powder refinement up to nanoscale as well as morphological changes to the particles. FE-SEM of the bulk MgB2 fabricated from the ultra-sonically refined boron exhibited a principal MgB2 phase with scarce impurities of MgO. Lattice parameters ‘a’ and ‘c’ calculated from XRD patterns remained constant around 3.086 and 3.523 Å respectively, ruling out any carbon intrusion from solvent into bulks. Simultaneously all the bulks had Tc,onset around 38.5 K, with a sharp transition (ΔTc ∼ 0.5 K).

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

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

1873-4669

Svazek periodika

955

Číslo periodika v rámci svazku

Sep

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

170146

Kód UT WoS článku

000990828300001

EID výsledku v databázi Scopus

2-s2.0-85153850146