Synergistic regulation of color and mechanical properties of silicon nitride ceramics via engineering hollow structures of Eu-enriched secondary phases

Ning Liu, Tengfei Hu, Zhengqian Fu, Jingxian Zhang, Y. Duan, Zhen Wang, Fangfang Xu, Shaoming Dong
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引用次数: 0

Abstract

Si3N4 ceramics, renowned for their superior mechanical properties, are widely regarded as the most promising materials for electronic device casing. This is particularly evident in the context of 5th generation mobile networks, where they outperform both glass and zirconia. However, achieving a synergetic balance between color and mechanical properties remains a significant challenge. In this study, we propose the use of phase separation in liquid phases, supported by a novel Eu2O3-YAG-MgO system, to engineer hollow structures. This approach aims to achieve high-toughness colored Si3N4 ceramics. The resulting hollow structure not only acts as a reinforcing phase in response to the stress field caused by lattice mismatch but also serves as one of the dominant chromophores. This is achieved through the 5d→4f transition of Eu2+ coupled with the 5D0→7FJ transition of Eu3+ under photon excitation. These findings offer new insights into the development of high-performance Si3N4 ceramics with well-controlled color.
通过富含 Eu 的次生相的工程空心结构协同调节氮化硅陶瓷的颜色和机械性能
Si3N4 陶瓷以其卓越的机械性能而闻名,被广泛认为是最有前途的电子设备外壳材料。这一点在第五代移动网络中尤为明显,因为它们的性能优于玻璃和氧化锆。然而,如何实现颜色和机械性能之间的协同平衡仍是一项重大挑战。在本研究中,我们提出利用液相中的相分离,在新型 Eu2O3-YAG-MgO 系统的支持下,设计中空结构。这种方法旨在实现高韧性彩色 Si3N4 陶瓷。由此产生的中空结构不仅能在晶格失配引起的应力场中起到强化相的作用,还能作为主要发色团之一。这是通过 Eu2+ 的 5d→4f 转变以及 Eu3+ 在光子激发下的 5D0→7FJ 转变实现的。这些发现为开发具有良好色泽控制的高性能 Si3N4 陶瓷提供了新的思路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
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