Effects of KCl flux on the morphology, anion composition, and chromaticity of perovskite oxynitrides, CaTaO2N, SrTaO2N, and LaTaON2
Source abstract
Abstract
Abstract Flux additives are known to expedite thermal ionic diffusion in the solid state, thereby lowering the activation barriers to ceramic synthesis and sintering. This paper reports the additional effects of flux, which is relevant to delicate color control of tantalum oxynitride pigments. Perovskites, CaTaO 2 N, SrTaO 2 N and LaTaON 2 , are potential inorganic pigments for yellow, orange and brick-red colors, respectively. The chromaticity of the above oxynitride is enhanced significantly using flux KCl in a thermal ammonolytic preparation. Such a variation of pigment color was correlated with the concentration of microstructural and compositional defects based on diffuse-reflectance absorbance spectroscopy, scanning electron microscopy, N 2 adsorption–desorption, and combustion analysis.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Inorganic Chemistry and Materials · Luminescence Properties of Advanced Materials · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
Show source-provided references
1. Inorganic yellow-red pigments without toxic metals10.1038/35010082 ↗
2. Photocatalytic overall water splitting under visible light using ATaO2N (A=Ca, Sr, Ba) and WO3 in a IO3−/I− shuttle redox mediated system10.1021/cm803145n ↗
3. Characterization of the structural, optical, and dielectric properties of oxynitride perovskites AMO2N (A=Ba, Sr, Ca; M=Ta, Nb)10.1021/cm034756j ↗
4. Large coupled magnetoresistances in EuNbO2N10.1021/ja804139g ↗
5. Perovskite-related oxynitrides − recent developments in synthesis, characterization and investigations of physical properties10.1016/j.progsolidstchem.2009.11.003 ↗
6. Chemistry and applications of oxynitride perovskites10.1039/c2jm13182j ↗
7. Nitrides and oxynitrides: preparation, crystal chemistry and properties10.1016/0955-2219(91)90096-I ↗
8. Tantalum and niobium perovskite oxynitrides: Synthesis and analysis of the thermal behavior10.1016/j.tca.2005.08.010 ↗
9. Photocatalytic water splitting to hydrogen over a visible light-driven LaTaON2 catalyst10.1016/S1872-2067(06)60032-6 ↗
10. Formation of barium–tantalum oxynitrides10.1007/BF00356510 ↗
11. Oxynitride perovskites: synthesis and structures of LaZrO2N, NdTiO2N, and LaTiO2N and comparison with oxide perovskites10.1021/cm010577v ↗
12. Structural investigations on the oxidenitrides SrTaO2N, CaTaO2N, and LaTaON2 by neutron and X-ray powder diffraction
13. High-temperature synthesis and structures of perovskite and n=1 Ruddlesden–Popper tantalum oxynitrides10.1021/cm011738y ↗
14. Ein beitrag zur optik der farbanstriche, Z
15. Hunt · 1998
16. Adsorption of gases in multimolecular layers10.1021/ja01269a023 ↗
17. Compounds with perovskite-type slabs. IV. Ferroelectric phase transitions in Sr2(Ta1−xNbx)2O7 (x≅0.12) and Sr2Ta2O7
18. Thermal stability limits of polar LaTaO4
19. Structural relations between weberite and zircolite polytypes − Refinements of doped 3T and 4M Ca2Ta2O7 and 3T CaZrTi2O710.1016/S0022-4596(03)00222-6 ↗
20. Size-strain line broadening analysis of high-permittivity oxynitrides BaTaO2N and BaNbO2N10.1016/j.ceramint.2011.10.078 ↗
21. Syntheses and characterizations of complex perovskite oxynitrides LaMg1/3Ta2/3O2N, LaMg1/2Ta1/2O5/2N1/2, and BaSc0.05Ta0.95O2.1N0.910.1016/j.jssc.2007.08.031 ↗
22. Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity10.1351/pac198557040603 ↗
23. Absorption edge of impure gallium arsenide10.1103/PhysRev.140.A2059 ↗
24. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides10.1107/S0567739476001551 ↗