Bringing electrical conductivity to SiAlON ceramics by integrating zeolitic imidazolate framework-derived nanocarbons

IF 3.8 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2025-05-23 DOI:10.1111/jace.20688

Levent Koroglu, Niyaz Cakan, Lale Civan, Derya Arslan, Unal Sen, Semra Kurama

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Abstract

α/β-Silicon aluminum oxynitride (SiAlON) ceramics reinforced with zeolitic imidazolate frameworks (ZIF-8) up to 20 wt% have been fabricated by spark plasma sintering to impart electrical conductivity without compromising the mechanical properties. The effect of ZIF-8 addition on the phase evolution, densification behavior, microstructural development, mechanical properties, and electrical properties has been discussed through the results obtained by X-ray diffraction, scanning electron microscopy, Raman analyses, sintering curves, microhardness tests, and electrical conductivity tests using the two-probe and van der Pauw methods. ZIF-8 transforms into carbon clusters and graphene platelets (GPs) during sintering. 10% ZIF-8-reinforced α/β-SiAlON ceramics demonstrate high relative density, hardness, and fracture toughness (97.6%, 19.4 GPa, and 5.7 MPa m^1/2), which are comparable to those of pure SiAlONs. Furthermore, their high electrical conductivity (1.9 × 10² S m^‒1), brought by elongated GPs forming conductive paths, enables machinability by electrical discharge machining (EDM) and expands their potential applications, including use in igniters, glow plugs, and heaters.

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通过整合沸石咪唑酸框架衍生的纳米碳，为SiAlON陶瓷带来导电性

采用火花等离子烧结的方法，制备了以沸石咪唑酸骨架（ZIF-8）增强的α/β-硅铝氧氮化（SiAlON）陶瓷，增强率高达20%，在不影响机械性能的情况下具有导电性。通过x射线衍射、扫描电镜、拉曼分析、烧结曲线、显微硬度测试、双探针法和范德波法电导率测试等方法，讨论了ZIF-8的添加对合金相演化、致密化行为、微观组织发育、力学性能和电性能的影响。ZIF-8在烧结过程中转化为碳团簇和石墨烯片（GPs）。10% zif -8增强α/β-SiAlON陶瓷具有较高的相对密度、硬度和断裂韧性（分别为97.6%、19.4 GPa和5.7 MPa m1/2），与纯sialon陶瓷相当。此外，它们的高导电性（1.9 × 102 S m-1），由细长的GPs形成导电路径，实现了电火花加工（EDM）的可加工性，并扩大了它们的潜在应用，包括在点火器，发光塞和加热器中的使用。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.