Influence of HIP Post-Treatment on the Microstructure and Luminescent Properties of SPSed Al2O3−Ce:YAG Composite Ceramics | Sciact - CRIS-system of Boreskov Institute of Catalysis

Influence of HIP Post-Treatment on the Microstructure and Luminescent Properties of SPSed Al2O3−Ce:YAG Composite Ceramics Full article

Journal

Journal of Alloys and Compounds
ISSN: 0925-8388 , E-ISSN: 1873-4669

Output data

Year: 2025, Volume: 1010, Article number : 178153, Pages count : 10 DOI: 10.1016/j.jallcom.2024.178153

Tags

Al2O3−Ce:YAG; Ceramic phosphors; Spark plasma sintering; Hot isostatic pressing; Microstructure; Luminescence performance

Authors

Kosyanov D.Yu. ¹ , Vornovskikh A.A. ¹ , Zavjalov A.P. ^1,2 , Tikhonov S.A. ¹ , Belov A.A. ¹ , Shichalin O.O. ¹ , Leonov A.A. ³ , Balabanov S.S. ⁴ , Wang Y. ^5,6 , Zhou Z. ^5,6 , Li J. ^5,6

Affiliations

1	Far Eastern Federal University, 10 Ajax Bay, Russky Island, Vladivostok 690922, Russia
2	Synchrotron Research Department, Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Koltsovo 630559, Russi
3	Institute of Automation and Control Processes, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690041, Russia
4	Laboratory of High-Purity Optical Materials, G.G. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhniy Novgorod 603137, Russia
5	Transparent Ceramics Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 585 He-shuo Road, Shanghai 201899, China
6	Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Fine-grained Al2O3−Ce:YAG composite ceramics with 0.05–0.3 at% Ce3 + doping were prepared by single reactive spark plasma sintering (SPS) and a two-step approach combining SPS and hot isostatic pressing (HIP) techniques. It was revealed that application of HIP provided additional homogenization of the Ce:YAG solid solution throughout the material volume, while changes in the recrystallization kinetics of constituent phases contributed to the stabilization of garnet/alumina grains sizes. An increase in external quantum efficiency in the series up to 72 % and 76 % was observed with saturation occurring at 0.2 at% Ce3+. The synchrotron radiation luminescence (SRL) kinetics allowed distinguishing two modes. In comparison with PL kinetics, the underestimation of decay time τslow values is explained by the SR effect, which similarly to the thermal effect can also induces the formation of radiation defects and the ionization of Ce3+ 5d electrons. Both PL and SRL studies revealed the presence of concentration quenching effect in phosphors with 0.3 at% Ce3+. Measurements under excitation by blue laser diodes (LDs) in the reflection mode showed that 0.1–0.2 at% Ce3+-doped samples after HIP treatment exhibited the most favorable characteristics for application in high-power white laser lighting. White LDs equipped with 0.4 mm-thick Al2O3–0.2 at% Ce:YAG showed an optimum correlated color temperature of 6499–6602 K, a high luminous flux of 222–2500 lm, and luminous efficiency of 242–232 lm·W−1 as LD power increased from 0.8 to 9.5 W·mm−2.

Kosyanov D.Y. , Vornovskikh A.A. , Zavjalov A.P. , Tikhonov S.A. , Belov A.A. , Shichalin O.O. , Leonov A.A. , Balabanov S.S. , Wang Y. , Zhou Z. , Li J.
Influence of HIP Post-Treatment on the Microstructure and Luminescent Properties of SPSed Al2O3−Ce:YAG Composite Ceramics
Journal of Alloys and Compounds. 2025. V.1010. 178153 :1-10. DOI: 10.1016/j.jallcom.2024.178153 WOS Scopus OpenAlex publication_identifier_short.sciact_skif_identifier_type

Submitted:	Jul 22, 2024
Accepted:	Dec 16, 2024
Published online:	Dec 17, 2024
Published print:	Jan 5, 2025

Web of science:	WOS:001392001500001
Scopus:	2-s2.0-85212337591
OpenAlex:	W4405491176
publication_identifier.sciact_skif_identifier_type:	3633

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