Chang Fanggao
Henan Normal University
Crystal structureAnalytical chemistryLattice constantDielectricCeramicPhase transitionInfraredComposite materialMaterials scienceDiffractionCondensed matter physicsMagnetizationNuclear magnetic resonanceOxygenSuperconductivityDopingSputter depositionUltrasonic sensorFerromagnetismDielectric loss
24Publications
6H-index
120Citations
Publications 23
Newest
#1Song Guilin (Henan Normal University)H-Index: 5
#2Su Jian (Henan Normal University)H-Index: 2
Last. Chang Fanggao (Henan Normal University)H-Index: 6
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Abstract Multiferroic BiFeO δ ( δ =2.67, 2.95 and 3.02) compound of various oxygen contents ( δ ) have been prepared by gel sol method. The influence of oxygen contents on the structure, electric and magnetic properties of BiFeO 3 compound has been investigated. X-ray diffraction (XRD) measurements indicate that all the samples of BiFeO δ have the same crystal structure regardless of oxygen content. The SEM micrograph reveals microstructures comprising of grains with various sizes from 200 nm to...
Source
#1Song GuilinH-Index: 5
#2Su JianH-Index: 2
Last. Chang FanggaoH-Index: 6
view all 4 authors...
#1安义鹏H-Index: 1
#2Li WenfengH-Index: 1
Last. Chang FanggaoH-Index: 6
view all 7 authors...
#1安义鹏H-Index: 1
#2Li WenfengH-Index: 1
Last. Zhang NaH-Index: 1
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#1Song GuilinH-Index: 5
#2Luo Yan-PingH-Index: 1
Last. Chang FanggaoH-Index: 6
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Multiferroic Bi0.95Dy0.05Fe1-xCoxO3 (x=0, 0.05, 0.1, 0.15) ceramics were prepared by rapid liquid phase sintering method. We studied the effect of (Dy+Co) doping on the structure, electrical and ferromagnetism properties of BiFeO3 ceramics. The structure and morphology of BiFeO3 ceramics were characterized by X-ray diffraction (XRD) and scanning electron microscopey (SEM). The results showed that all the peaks for Bi0.95Dy0.05Fe1-xCoxO3 samples can be indexed based on the crystal structure of pu...
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Cu2ZnSnS4 powder was prepared by solid phase reaction method.The powder samples' Crystal structure and micro morphology were characterized with SEM and XRD,and the optical properties of samples was tested by UV-Vis-NIR spectrophotometer.The relationship among of heat treatment temperature with CZTS powder's crystal structure,optical absorption coefficient and the band gap effect was studied.The result shows that the Kesterite structure CZTS powder was succesed prepared by ing solid phase method ...
#1Song GuilinH-Index: 5
#2Zhou Xiao-HuiH-Index: 2
Last. Chang FanggaoH-Index: 6
view all 6 authors...
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Molybdenum oxide thin films have been prepared by dc reactive magnetron sputtering from a metallic Mo target in an Ar+O2 mixed atmosphere.The electrochromic(EC) properties of the films are studied with different deposition pressure in the deposition process.The MoO3 films are characterized with x-ray diffraction(XRD),atomic force microscopy(AFM) and Fourier transform infrared(FT-IR) spectroscopy.The electrochromic properties of the samples are measured by means of spectrophotometry.In addition,e...
The morphology and conductivity of Mo films are prepared under different working pressure(0.2-2.0 Pa) and power(50-150 W)on the ordinary glass substrates by direct current magnetron sputtering.The experimental result shows that the surface morphology becomes coarse with increaded Ar pressure when power is fixed at 108W.And the conductivity becomes worse correspondingly.The highest resistivity,1.22×10-4 Ω·cm,is reached at a Ar pressure of 0.4 Pa.When working pressure is fixed at 0.2 Pa,the deposi...
It presents the structural and electronic characterization of CuInGaSe2(CIGS) and CuInAlSe2(CIAS).The fully-relaxed calculations have been made using the density functional theory,and structure constant matches the experimental values.The density of states,adsorption constant,reflectivity,dielectric constant and refractive index are also calculated.The results show that the chalcopyrite CIGS and CIAS are direct band gap semiconductors with band gaps 1.34 eV,1.50 eV respectively.Comparatively,CIA...
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