Zhang Hao, Joo Yun Hwan, Wang Yue, Yi Tongqiang, Sung Tae Hyun
Department of Electrical Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, People's Republic of China.
Nanotechnology. 2024 Apr 15;35(27). doi: 10.1088/1361-6528/ad373a.
This study explored the synthesis and sintering of potassium sodium niobate (KNN) nanoparticles, emphasizing morphology, crystal structure, and sintering methods. The as-synthesized KNN nanoparticles exhibited a spherical morphology below 200 nm. Solid state sintering (SSS) and laser-induced shockwave sintering (LISWS) were compared, with LISWS producing denser microstructures and improved grain growth. Raman spectroscopy and x-ray diffraction confirmed KNN perovskite structure, with LISWS demonstrating higher purity. High-resolution x-ray photoelectron spectroscopy spectra indicated increased binding energies in LISWS, reflecting enhanced density and crystallinity. Dielectric and loss tangent analyses showed temperature-dependent behavior, with LISWS-3 exhibiting superior properties. Antenna performance assessments revealed LISWS-3's improved directivity and reduced sidelobe radiation compared to SSS, attributed to its denser microstructure. Overall, LISWS proved advantageous for enhancing KNN ceramics, particularly in antenna applications.
本研究探索了铌酸钾钠（KNN）纳米颗粒的合成与烧结，重点关注其形态、晶体结构和烧结方法。合成的KNN纳米颗粒在200纳米以下呈现球形形态。对固态烧结（SSS）和激光诱导冲击波烧结（LISWS）进行了比较，结果表明LISWS产生的微观结构更致密，晶粒生长得到改善。拉曼光谱和X射线衍射证实了KNN钙钛矿结构，LISWS显示出更高的纯度。高分辨率X射线光电子能谱表明LISWS中的结合能增加，反映出密度和结晶度的提高。介电常数和损耗角正切分析显示出与温度相关的行为，LISWS-3表现出优异的性能。天线性能评估表明，与SSS相比，LISWS-3的方向性得到改善，旁瓣辐射减少，这归因于其更致密的微观结构。总体而言，LISWS被证明有利于增强KNN陶瓷，特别是在天线应用中。
