Composition dependence of the structure and optical properties of CuCrO2 powders

Jinyu Cui; Huiyi Cao; Wenliang Zhou; Leilei Chen; Xuezhen Zhai; Lu Yu; Tuo Zheng; Pingxiong Yang

doi:10.1016/j.matlet.2015.10.043

Composition dependence of the structure and optical properties of CuCrO₂ powders

Jinyu Cui
, Huiyi Cao
, Wenliang Zhou
, Leilei Chen
, Xuezhen Zhai
, Lu Yu
, Tuo Zheng
, Pingxiong Yang^*

^*Corresponding author for this work

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

CuCrO₂ powders have been prepared by solid state reaction method followed by thermal treatments at 850°C for 4 h in air. Effects of mole ratio variation (Cr/Cu=1.03, 1, 0.95) on the morphological, structural and optical properties of CuCrO₂ powders have been investigated. Both X-ray diffraction and Raman measurements indicate that the CuCrO₂ powders belong to the delafossite structure. The Cr/Cu ratio drives the structural phase transition from multiphase coexistence to single CuCrO₂ phase. Morphological images reveal that the CuCrO₂ powder (Cr/Cu=1) exhibits a clear lamellae hexagonal structure whereas the Cr-rich sample (Cr/Cu=1.03) shows a distinct blocky structure, which possibly attributed to the Cr₂O₃ grains coating on those of CuCrO₂. The optical absorption spectra of the as-prepared powders show that CuCrO₂ has an indirect band gap of 1.64 eV.

Original language	English
Article number	19699
Pages (from-to)	28-31
Number of pages	4
Journal	Materials Letters
Volume	163
DOIs	https://doi.org/10.1016/j.matlet.2015.10.043
State	Published - 15 Jan 2016

Keywords

Composite materials
Optical property
Powder technology
Structural

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10.1016/j.matlet.2015.10.043

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title = "Composition dependence of the structure and optical properties of CuCrO2 powders",

abstract = "CuCrO2 powders have been prepared by solid state reaction method followed by thermal treatments at 850°C for 4 h in air. Effects of mole ratio variation (Cr/Cu=1.03, 1, 0.95) on the morphological, structural and optical properties of CuCrO2 powders have been investigated. Both X-ray diffraction and Raman measurements indicate that the CuCrO2 powders belong to the delafossite structure. The Cr/Cu ratio drives the structural phase transition from multiphase coexistence to single CuCrO2 phase. Morphological images reveal that the CuCrO2 powder (Cr/Cu=1) exhibits a clear lamellae hexagonal structure whereas the Cr-rich sample (Cr/Cu=1.03) shows a distinct blocky structure, which possibly attributed to the Cr2O3 grains coating on those of CuCrO2. The optical absorption spectra of the as-prepared powders show that CuCrO2 has an indirect band gap of 1.64 eV.",

keywords = "Composite materials, Optical property, Powder technology, Structural",

author = "Jinyu Cui and Huiyi Cao and Wenliang Zhou and Leilei Chen and Xuezhen Zhai and Lu Yu and Tuo Zheng and Pingxiong Yang",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2016",

month = jan,

day = "15",

doi = "10.1016/j.matlet.2015.10.043",

language = "英语",

volume = "163",

pages = "28--31",

journal = "Materials Letters",

issn = "0167-577X",

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TY - JOUR

T1 - Composition dependence of the structure and optical properties of CuCrO2 powders

AU - Cui, Jinyu

AU - Cao, Huiyi

AU - Zhou, Wenliang

AU - Chen, Leilei

AU - Zhai, Xuezhen

AU - Yu, Lu

AU - Zheng, Tuo

AU - Yang, Pingxiong

PY - 2016/1/15

Y1 - 2016/1/15

N2 - CuCrO2 powders have been prepared by solid state reaction method followed by thermal treatments at 850°C for 4 h in air. Effects of mole ratio variation (Cr/Cu=1.03, 1, 0.95) on the morphological, structural and optical properties of CuCrO2 powders have been investigated. Both X-ray diffraction and Raman measurements indicate that the CuCrO2 powders belong to the delafossite structure. The Cr/Cu ratio drives the structural phase transition from multiphase coexistence to single CuCrO2 phase. Morphological images reveal that the CuCrO2 powder (Cr/Cu=1) exhibits a clear lamellae hexagonal structure whereas the Cr-rich sample (Cr/Cu=1.03) shows a distinct blocky structure, which possibly attributed to the Cr2O3 grains coating on those of CuCrO2. The optical absorption spectra of the as-prepared powders show that CuCrO2 has an indirect band gap of 1.64 eV.

AB - CuCrO2 powders have been prepared by solid state reaction method followed by thermal treatments at 850°C for 4 h in air. Effects of mole ratio variation (Cr/Cu=1.03, 1, 0.95) on the morphological, structural and optical properties of CuCrO2 powders have been investigated. Both X-ray diffraction and Raman measurements indicate that the CuCrO2 powders belong to the delafossite structure. The Cr/Cu ratio drives the structural phase transition from multiphase coexistence to single CuCrO2 phase. Morphological images reveal that the CuCrO2 powder (Cr/Cu=1) exhibits a clear lamellae hexagonal structure whereas the Cr-rich sample (Cr/Cu=1.03) shows a distinct blocky structure, which possibly attributed to the Cr2O3 grains coating on those of CuCrO2. The optical absorption spectra of the as-prepared powders show that CuCrO2 has an indirect band gap of 1.64 eV.

KW - Composite materials

KW - Optical property

KW - Powder technology

KW - Structural

UR - https://www.scopus.com/pages/publications/84944452156

U2 - 10.1016/j.matlet.2015.10.043

DO - 10.1016/j.matlet.2015.10.043

M3 - 文章

AN - SCOPUS:84944452156

SN - 0167-577X

VL - 163

SP - 28

EP - 31

JO - Materials Letters

JF - Materials Letters

M1 - 19699

ER -

Composition dependence of the structure and optical properties of CuCrO₂ powders

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Keywords

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