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首页> 外文期刊>RSC Advances >Sodium potassium niobate (K0.5Na0.5NbO3, KNN) thick films by electrophoretic deposition
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Sodium potassium niobate (K0.5Na0.5NbO3, KNN) thick films by electrophoretic deposition

机译：电泳沉积铌酸钠钾盐（K0.5Na0.5NbO3，KNN）厚膜

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摘要

K0.5Na0.5NbO3 (KNN) is one of the most promising lead free compositions to substitute lead based piezoelectrics. Due to size and functionality demands, thick films are currently required for specific electroceramics applications. However, what is lacking is the exploitation of low cost, solution-based processes for the fabrication of KNN thick films that are versatile and easy to scale up, such as electrophoretic deposition (EPD). In this article, KNN thick films with thicknesses ranging from 10-60 mu m, prepared by EPD on platinum substrates, are reported. The films are made from acetone with triethanolamine suspension media. When sintered at 1100 degrees C/2 h they possess relative permittivity and dielectric loss of similar to 393 and similar to 0.07, respectively, at room temperature and at 1 MHz. KNN films show piezoelectric response (d(33)) of similar to 40 pC N-1. It is notable that such values are comparable to the properties of equivalent bulk ceramics. The study of the relationships between processing variables and the films' properties shows that, through a simple and yet low cost process such as EPD, thick KNN films can be consistently designed to be suited to the required application. These results suggest that this fabrication method is very promising as a core technology for low-cost and high-performance KNN thick films.
机译：K0.5Na0.5NbO3（KNN）是最有希望替代铅基压电材料的无铅组合物之一。由于尺寸和功能需求，目前特定的电瓷应用需要厚膜。然而，缺少的是利用低成本，基于溶液的工艺来制造通用且易于放大的KNN厚膜，例如电泳沉积（EPD）。本文报道了由EPD在铂基底上制备的厚度为10-60微米的KNN厚膜。该膜由丙酮与三乙醇胺悬浮介质制成。当在1100摄氏度/ 2小时下烧结时，它们在室温和1 MHz下的相对介电常数和介电损耗分别类似于393和0.07。 KNN薄膜显示出类似于40 pC N-1的压电响应（d（33））。值得注意的是，这些值可与等效的块状陶瓷的性能相比。对工艺变量与薄膜性能之间关系的研究表明，通过简单而低成本的工艺（例如EPD），可以始终如一地设计厚KNN薄膜以适合所需的应用。这些结果表明，这种制造方法作为低成本和高性能KNN厚膜的核心技术非常有希望。

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