Evaluation of polyvinylpyrrolidone as a dispersant of barium titanate for multilayer ceramic capacitor (MLCC) application

IF 3.4 4区工程技术 Q2 POLYMER SCIENCE

Macromolecular Research Pub Date : 2025-03-26 DOI:10.1007/s13233-025-00383-w

Young-O Kim, Jung Jin Park, Rhakhyeon Baek, Hosam Choi, Dong Jun Jung, Jong Ho Lee

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Abstract

Uniform dispersion of nanoparticles (NPs) in polymeric binders is crucial in determining the mechanical properties of dielectric sheets, which can reduce factors contributing to the electrical failure of multilayer ceramic capacitors (MLCCs). Selecting the appropriate dispersants is essential for optimizing the interfacial interaction between the surface of NPs and binders. General strategies for designing dispersants involve making the chemical structures of dispersants similar to those of binders to increase material compatibility. However, to diversify the range of material choices, it is necessary to consider dispersants with chemical structures different from those of the binders. In this study, polyvinylpyrrolidone (PVP) was selected as a dispersant for barium titanate (BaTiO₃; BT) NPs and PVP-coated NPs were incorporated into a polyvinylbutyral (PVB) binder. PVP enhanced the dispersibility of the BT slurries and improved the mechanical properties of the dielectric sheets, which ultimately enhanced the electrical characteristics of MLCC. Therefore, the findings of this study demonstrate that PVP is a promising dispersant for BT NPs, contributing to the manufacturing of MLCCs with superior electrical performance.

Graphical abstract

The BT NP was well-coated with PVP dispersants and was stably dispersed in mixed solvent (EtOH/Tol). The PVP provides hydrogen bond acceptor sites on the surface of BT, which enhanced the interfacial interaction between the surface of BT and the PVB binder. This result leads to the increase of the mechanical properties of the dielectric sheet and the improvement of the electrical properties (BDV and short rate) of MLCC

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聚乙烯吡咯烷酮作为多层陶瓷电容器（MLCC）中钛酸钡分散剂的评价

纳米粒子（NPs）在聚合物粘合剂中的均匀分散对决定介质片的力学性能至关重要，这可以减少导致多层陶瓷电容器（mlcc）电气故障的因素。选择合适的分散剂是优化NPs表面与粘合剂之间的界面相互作用的关键。设计分散剂的一般策略包括使分散剂的化学结构与粘合剂相似，以增加材料相容性。然而，为了使材料选择范围多样化，有必要考虑具有不同于粘合剂的化学结构的分散剂。在本研究中，选择聚乙烯吡咯烷酮（PVP）作为钛酸钡（BaTiO3）的分散剂，将BT NPs和PVP包覆的NPs掺入聚乙烯丁醛（PVB）粘合剂中。PVP增强了BT浆料的分散性，改善了介质片的力学性能，最终提高了MLCC的电学特性。因此，本研究结果表明PVP是一种很有前途的BT NPs分散剂，有助于制造具有优异电性能的mlcc。图：BT NP包被PVP分散剂，在EtOH/Tol混合溶剂中稳定分散。PVP在BT表面提供了氢键受体位点，增强了BT表面与PVB粘结剂的界面相互作用。这一结果提高了介质片的力学性能，改善了MLCC的电学性能（BDV和short rate）

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.