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Liu W, Zou Y, Chen Y, Lei Z, Zhao L, Song L. Optimizing the Structure and Optical Properties of Lanthanum Aluminate Perovskite through Nb 5+ Doping. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:608. [PMID: 38607142 PMCID: PMC11013914 DOI: 10.3390/nano14070608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 04/13/2024]
Abstract
This work involves the introduction of niobium oxide into lanthanum aluminate (LaAlO3) via a conventional solid-state reaction technique to yield LaAlO3:Nb (LaNbxAl1-xO3+δ) samples with Nb5+ doping levels ranging from 0.00 to 0.25 mol%. This study presents a comprehensive investigation of the effects of niobium doping on the phase evolution, defect control, and reflectance of LaNbxAl1-xO3+δ powder. Powder X-ray diffraction (XRD) analysis confirms the perovskite structure in all powders, and XRD and transmission electron microscopy (TEM) reveal successful doping of Nb5+ into LaNbxAl1-xO3+δ. The surface morphology was analyzed by scanning electron microscopy (SEM), and the results show that increasing the doping concentration of niobium leads to fewer microstructural defects. Oxygen vacancy defects in different compositions are analyzed at 300 K, and as the doping level increases, a clear trend of defect reduction is observed. Notably, LaNbxAl1-xO3+δ with 0.15 mol% Nb5+ exhibits excellent reflectance properties, with a maximum infrared reflectance of 99.7%. This study shows that LaNbxAl1-xO3+δ powder materials have wide application potential in the field of high reflectivity coating materials due to their extremely low microstructural defects and oxygen vacancy defects.
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Affiliation(s)
- Wei Liu
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; (W.L.); (Y.Z.); (Y.C.); (Z.L.); (L.S.)
- School of Chemistry and Materials Science, Shanghai Normal University (SNU), Shanghai 200234, China
| | - Yang Zou
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; (W.L.); (Y.Z.); (Y.C.); (Z.L.); (L.S.)
| | - Yuang Chen
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; (W.L.); (Y.Z.); (Y.C.); (Z.L.); (L.S.)
- School of Physical Science and Technology, ShanghaiTech University (STU), Shanghai 201210, China
| | - Zijian Lei
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; (W.L.); (Y.Z.); (Y.C.); (Z.L.); (L.S.)
- School of Materials Science and Engineering, Shanghai University (SHU), Shanghai 200444, China
| | - Lili Zhao
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; (W.L.); (Y.Z.); (Y.C.); (Z.L.); (L.S.)
| | - Lixin Song
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; (W.L.); (Y.Z.); (Y.C.); (Z.L.); (L.S.)
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Kanwar K, Pradhan S, Satapathy S, Bitla Y, Panwar N. Structural, optical and dielectric investigations on RECr0.85Mn0.15O3 (RE = Ho, Gd and Pr) nanoparticles. J RARE EARTH 2023. [DOI: 10.1016/j.jre.2023.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Bhuyan MDI, Hossain R, Ara F, Basith MA. A first-principles study on the phase stability and physical properties of a B-site ordered Nd 2CrFeO 6 double perovskite. Phys Chem Chem Phys 2021; 24:1569-1579. [PMID: 34940777 DOI: 10.1039/d1cp03523a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Here, the first-principles predictions on the structural stability, magnetic behavior and electronic structure of B-site ordered double perovskite Nd2CrFeO6 have been reported. Initially, the ground state of the parent single perovskites NdCrO3 and NdFeO3 has been studied to determine the relevant Hubbard U parameter to investigate the properties of Nd2CrFeO6. The thermodynamic, mechanical, and dynamic stability analyses suggest the possibility of the synthesis of the Nd2CrFeO6 double perovskite at ambient pressure. The compound shows a ferrimagnetic nature with 2 μB net magnetic moment and the magnetic ordering temperature has been estimated to be ∼265 K. The electronic structure indicates a higher probability of direct photon transition over the indirect transition with a band gap of ∼1.85 eV. Additional effects of Nd (4f) spin and spin-orbit coupling on the band edges have been found to be negligible for this 4f-3d-3d spin system. This first-principles investigation predicts that due to the ferrimagnetic nature and a significantly lower band gap compared to those of its antiferromagnetic parent single perovskites, the B-site ordered Nd2CrFeO6 double perovskite could be a promising material for spintronic and visible-light driven energy applications.
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Affiliation(s)
- M D I Bhuyan
- Nanotechnology Research Laboratory, Department of Physics, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh.
| | - Rana Hossain
- Department of Mechanical Science and Bioengineering, Osaka University, Osaka 560-8531, Japan.
| | - Ferdous Ara
- Institute of Multidisciplinary Research of Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-0877, Japan
| | - M A Basith
- Nanotechnology Research Laboratory, Department of Physics, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh.
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