具有增强铁电、光致变色和发光特性的掺 Eu (K0.5Na0.5)NbO3 陶瓷的合成与表征

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-20 DOI:10.1016/j.jallcom.2024.177690

Hae In Choi, Jae Ho Han, Chae Yeon Lee, Myang Hwan Lee, Tae Kwon Song, Yun Sang Lee

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引用次数: 0

摘要

稀土离子掺杂的铌酸钠钾（(K0.5Na0.5)NbO3，KNN）陶瓷中存在的次生相限制了其电子应用。为了解决这一限制，我们研究了掺杂 Eu3+ 的铌酸钠钾（KNEN）陶瓷的电子和发光特性。我们通过仔细调节 Na 和 K 的浓度，用 1 mol% 的 Eu 合成了不含次生相的高纯度 KNEN 包晶相。KNEN 陶瓷具有出色的铁电和发光特性，包括光致变色效应，在紫外线和 X 射线照射下会呈现可逆的颜色变化。此外，我们还观察到，在约 200 °C 的正方-四方相变附近，电学特性和发光特性之间存在很强的相关性。这些结果表明，KNEN 陶瓷是一种很有前途的无铅发光压电材料。

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Synthesis and Characterization of Eu-Doped (K0.5Na0.5)NbO3 Ceramics with Enhanced Ferroelectric, Photochromic, and Luminescent Properties

The presence of secondary phases in rare-earth ion-doped potassium sodium niobate ((K_0.5Na_0.5)NbO₃, KNN) ceramics limit its electronic applications. To address this limitation, we investigated the electronic and luminescence properties of Eu³⁺-doped KNN (KNEN) ceramics. We synthesized a high-purity perovskite phase of KNEN without secondary phases by carefully adjusting the Na and K concentrations with 1 mol% Eu. KNEN ceramics demonstrated excellent ferroelectric and luminescent properties, including a photochromic effect that presented reversible color changes on exposure to ultraviolet light and X-rays. Further, we observed a strong correlation between the electric and luminescent properties near the orthorhombic-tetragonal phase transition at ~200 °C. These results suggest that KNEN ceramics are promising Pb-free luminescent piezoelectric materials.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.