Non-ammonolysis synthesis and characterisation of environmentally benign yellow pigments based on calcium–tantalum perovskite oxynitrides

Materials Advances Volume 3 Issue 12 Page 4899-4907 published_at 2022-05-19
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Title ( eng )
Non-ammonolysis synthesis and characterisation of environmentally benign yellow pigments based on calcium–tantalum perovskite oxynitrides
Creator
Sakata Takuya
Urushidani Sohta
Koyama Kyohei
Iwata Nozomu
Masubuchi Yuji
Source Title
Materials Advances
Volume 3
Issue 12
Start Page 4899
End Page 4907
Abstract
Calcium–tantalum-based perovskite oxynitrides were synthesised as candidates for environmentally benign inorganic yellow pigments. The compounds were prepared via a urea-nitriding method, which does not involve a harmful ammonolysis process. Rapid single-phase synthesis was achieved under the optimum conditions, and only removable by-products were generated. Although the colours and bandgap energies of the obtained calcium–tantalum oxynitrides, CaTa(O,N)3, fell short of those of CaTaO2N synthesised by ammonolysis, they were made comparable by doping with La3+. Among the samples synthesised in this study, the most brilliant yellow hue was achieved with Ca0.8La0.2Ta(O,N)3, which has lightness (L*) and yellowness (b*) values comparable to those of conventional inorganic yellow pigments. In this synthetic method, harmful substances are eliminated both from the products and the synthesis process. In addition, the short heat-treatment duration enables the products to be obtained as fine powders suitable for pigment applications. Calcium–tantalum-based perovskite oxynitrides prepared by the strategy developed in this study have potential applications as environmentally benign yellow pigments.
Descriptions
This work was supported by JSPS KAKENHI (Grant No.JP16H06439, JP18K19132, JP18H01709, JP19H04699, and JP20H02439).
Language
eng
Resource Type journal article
Publisher
The Royal Society of Chemistry
Date of Issued 2022-05-19
Rights
© 2022 The Author(s). This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 2633-5409
[DOI] 10.1039/d2ma00378c
[DOI] https://doi.org/10.1039/D2MA00378C