Synthesis of Eu-doped K0.5Na0.5NbO3 ceramics and their luminescent and dielectric properties

被引：5
作者：
Lubszczyk, Marta [1 ]
Brylewski, Tomasz [1 ]
Ziewiec, Krzysztof [2 ]
Kruk, Andrzej [2 ]
机构：
[1] AGH Univ Krakow, Fac Mat Sci & Ceram, Al Mickiewicza 30, PL-30059 Krakow, Poland
[2] Univ Natl Educ Commiss, Inst Technol, Ul Podchorazych 2, PL-30084 Krakow, Poland
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2024年 / 149卷 / 05期
关键词：
KNN; Wet chemistry method; Dielectric properties; Luminescence; PIEZOELECTRIC PROPERTIES; THERMAL-DECOMPOSITION; PHASE-TRANSITION; KNN; TEMPERATURE; PHOTOLUMINESCENCE; MICROSTRUCTURE; NA0.5K0.5NBO3; EQUILIBRIA; PRECURSOR;
D O I：
10.1007/s10973-023-12806-w
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
K0.5Na0.5NbO3:xEu sol-gel powders and bulk samples were synthesized by means of a modified sol-gel method. Two types of samples were obtained via sintering at two temperatures. X-ray diffraction revealed the presence of the perovskite phase in materials obtained at both temperatures. Eu3+ emission and excitation studies were conducted to determine its luminescence response. For K0.5Na0.5NbO3:xEu sinters, the excitation spectra included narrow peaks in the VIS range due to the D-5(0)-F-7(1) and D-5(0)-F-7(2) relaxation processes. These transitions were indicative of the presence of Eu3+ at sites of low symmetry. Dielectric studies indicated that Eu2O3 affected the observed phase transitions. The influence of sintering temperature on structure and physicochemical properties was discussed.
引用
收藏
页码：2033 / 2048
页数：16
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