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Correlation between Nanostructural and Enhanced Electrical Conductivity of Annealed 30V 2 O 5 –20Bi 2 O 3 –50P 2 O 5 Glass
Author(s) -
Hannora Ahmed,
ElDesoky Mohamed
Publication year - 2020
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.202000128
Subject(s) - materials science , monoclinic crystal system , annealing (glass) , analytical chemistry (journal) , crystallization , amorphous solid , bismuth , crystallite , orthorhombic crystal system , crystallinity , differential scanning calorimetry , conductivity , electrical resistivity and conductivity , crystallography , mineralogy , crystal structure , metallurgy , chemical engineering , chemistry , composite material , thermodynamics , physics , chromatography , engineering , electrical engineering
Structural and DC conductivity of annealed 30V 2 O 5 –20Bi 2 O 3 –50P 2 O 5 traditional quenching melt glass is investigated. The as quenched with amorphous nature and crystallized formed phases of annealed samples are confirmed by X‐ray diffraction and differential scanning calorimeter (DSC) techniques. The average crystallite size of the present samples after crystallization at different temperatures and times is estimated to be about 47–74.9 nm. DSC analyses of the glasses indicate a prominent glass transition temperature at 669.9 K. Monoclinic bismuth phosphate phase is formed after annealing at 723 K for 2 h and completely disappeared at 923 K with the formation of orthorhombic vanadium phosphorus oxide and new bismuth phosphate monoclinic phase. The conductivity is discussed in conformity with Mott's theory. The crystallinity development reduces the grain boundaries which leads to the conductivity improvement.