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Properties of Ceramic Composites

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Porous Materials".

Deadline for manuscript submissions: closed (20 July 2024) | Viewed by 4436

Special Issue Editors

Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, China
Interests: aerogels; hydrogels; cyclodextrins; sol-gels; self-assembly; energy; enviroment; biomedical
School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, China
Interests: ceramic matrix composites for electromagnetic wave absorption
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Guest Editor
School of Textile and Clothing, Nantong University, Nantong 226019, China
Interests: ceramic matrix composites for thermal insulation

Special Issue Information

Dear Colleagues,

As a kind of key inorganic non-metallic material, ceramic plays a very important role in the development of modern industry. Therefore, the application of ceramic material should be paid attention to focus on. This special issue is focused on the research of ceramic material including but not limited to materials components, fabrication processes, testing equipment and/or methods, applications in thermodynamics, mechanical, electricity, absorption, sound insulation, electromagnetic wave shielding, piezoceramics, and so on. We cordially invite experts in the field of ceramic research to participate in this special issue and contribute manuscripts to us.

https://www.mdpi.com/journal/materials/special_issues/nanomaterials_asia

Dr. Jin Wang
Dr. Xinli Ye
Dr. Junxiong Zhang
Guest Editors

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Keywords

  • ceramic matrix composites
  • ceramics
  • ceramic fiber
  • ceramic aerogel

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Published Papers (4 papers)

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Research

14 pages, 5736 KiB  
Article
Effect of Carbon Black Content and Firing Atmosphere on the Properties and Microstructure of Al2O3-SiC-C Castables
by Quanli Jia, Jing Chen, Mantang He, Mengyang Sang, Pingyi Zhou and Haoxuan Ma
Materials 2024, 17(22), 5506; https://doi.org/10.3390/ma17225506 - 12 Nov 2024
Viewed by 699
Abstract
Al2O3-SiC-C (ASC) castables containing spherical asphalt are widely utilized in high-temperature metallurgical furnaces because of their good abrasive resistance and slag resistance; however, the release of hazardous benzopyrene during the pyrosis process in spherical asphalt is detrimental to the [...] Read more.
Al2O3-SiC-C (ASC) castables containing spherical asphalt are widely utilized in high-temperature metallurgical furnaces because of their good abrasive resistance and slag resistance; however, the release of hazardous benzopyrene during the pyrosis process in spherical asphalt is detrimental to the environment and to the health of furnace workers. Herein, nontoxic nano carbon black (CB) was selected as the carbon source for ASC castables, and the effects of the CB amount and sintering atmosphere on the properties of ASC castables were investigated in this work. The results show that on increasing CB from 0.5% to 2%, the cold strength of the samples after firing in the reducing atmosphere increased, the residual strength increased, and the slag penetrated depth decreased; the reasons can be ascribed to nano CB being able to fill the pores to reduce the apparent porosity of the castables. Furthermore, SiC whiskers were formed at elevated temperatures and generated a network structure, which was beneficial in improving their properties. When CB was 1%, the cold modulus of the rupture of the samples after firing in the oxidizing atmosphere and reducing atmosphere were higher (about 20 MPa), the retained strength ratio of the samples pre-fired in the reducing atmosphere was the highest (85.4%), the hot strength at 1400 °C of the samples tested in the oxidized atmosphere was the highest (5.3 MPa), and the slag resistance of the samples measured in the oxidizing atmosphere was the best. The castables heat-treated in the air atmosphere possessed higher hot strength and slag resistance; the reasons can be attributed to the formed SiO2 derived from the oxidation of SiC, which reacted with Al2O3 to form mullite, creating a strengthening effect and decreasing the porosity and increasing the viscosity of slag, thereby improving the hot strength and slag resistance. Full article
(This article belongs to the Special Issue Properties of Ceramic Composites)
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17 pages, 5545 KiB  
Article
Effects of Samarium Doping on the Dielectric Properties of BaBi2Nb2O9 Aurivillius Ceramics
by Michał Rerak, Jolanta Makowska, Tomasz Goryczka, Beata Wodecka-Duś, Katarzyna Osińska, Grzegorz Tytko and Małgorzata Adamczyk-Habrajska
Materials 2024, 17(20), 4952; https://doi.org/10.3390/ma17204952 - 10 Oct 2024
Viewed by 981
Abstract
This study investigates the influence of samarium (Sm3+) doping on the structural, microstructural, mechanical, and dielectric properties of BaBi2Nb2O9 (BBN) ceramics. Using the solid-state reaction method, samples of BaBi2-xSmxNb2O9 [...] Read more.
This study investigates the influence of samarium (Sm3+) doping on the structural, microstructural, mechanical, and dielectric properties of BaBi2Nb2O9 (BBN) ceramics. Using the solid-state reaction method, samples of BaBi2-xSmxNb2O9 with varying concentrations of Sm (x = 0.01; 0.02; 0.04; 0.06; 0.08; 0.1) were prepared. Thermal analysis, microstructure characterization via SEM and EDS, X-ray diffraction, mechanical testing, and dielectric measurements were conducted. The results revealed that increasing Sm3+ concentration led to the formation of single-phase materials with a tetragonal structure at room temperature. Mechanical properties, such as Young’s modulus and stiffness, improved with Sm doping, indicating stronger atomic bonding. Dielectric properties showed that low concentrations of Sm3+ slightly increased electrical permittivity, while higher concentrations reduced it. The presence of Sm3⁺ also affected the relaxor properties, evidenced by changes in the freezing temperature and activation energy. Overall, the study concludes that samarium doping enhances the structural and functional properties of BBN ceramics, making them promising candidates for high-temperature piezoelectric and dielectric applications. The findings provide valuable insights into tailoring ceramic materials for advanced technological applications. Full article
(This article belongs to the Special Issue Properties of Ceramic Composites)
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16 pages, 5467 KiB  
Article
Novel Sol-Gel Synthesis Route for Ce- and V-Doped Ba0.85Ca0.15Ti0.9Zr0.1O3 Piezoceramics
by Larissa S. Marques, Michelle Weichelt, Michel Kuhfuß, Carlos R. Rambo and Tobias Fey
Materials 2024, 17(13), 3228; https://doi.org/10.3390/ma17133228 - 1 Jul 2024
Cited by 1 | Viewed by 1025
Abstract
To meet the current demand for lead-free piezoelectric ceramics, a novel sol-gel synthesis route is presented for the preparation of Ba0.85Ca0.15Ti0.9Zr0.1O3 doped with cerium (Ce = 0, 0.01, and 0.02 mol%) and vanadium (V [...] Read more.
To meet the current demand for lead-free piezoelectric ceramics, a novel sol-gel synthesis route is presented for the preparation of Ba0.85Ca0.15Ti0.9Zr0.1O3 doped with cerium (Ce = 0, 0.01, and 0.02 mol%) and vanadium (V = 0, 0.3, and 0.4 mol%). X-ray diffraction patterns reveal the formation of a perovskite phase (space group P4mm) for all samples after calcination at 800 °C and sintering at 1250, 1350, and 1450 °C, where it is proposed that both dopants occupy the B site. Sintering studies show that V doping allows the sintering temperature to be reduced to at least 1250 °C. Undoped BCZT samples sintered at the same temperature show reduced functional properties compared to V-doped samples, i.e., d33 values increase by an order of magnitude with doping. The dissipation factor tan δ decreases with increasing sintering temperature for all doping concentrations, while the Curie temperature TC increases for all V-doped samples, reaching 120 °C for high-concentration co-doped samples. All results indicate that vanadium doping can facilitate the processing of BCZT at lower sintering temperatures without compromising performance while promoting thermal property stability. Full article
(This article belongs to the Special Issue Properties of Ceramic Composites)
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11 pages, 3753 KiB  
Article
Effects of Heat Treatment on the Electromagnetic Wave Absorption Characteristics of Resorcinol Formaldehyde Silicon Dioxide Ceramic Particles
by Haiyang Zhang, Xinli Ye, Jianqing Xu, Shan Li, Xiaomin Ma, Wei Xu and Junxiong Zhang
Materials 2024, 17(10), 2376; https://doi.org/10.3390/ma17102376 - 15 May 2024
Cited by 1 | Viewed by 1155
Abstract
In light of the pressing environmental and health issues stemming from electromagnetic pollution, advanced electromagnetic wave absorbing materials are urgently sought to solve these problems. The present study delved into the fabrication of the resorcinol formaldehyde (RF)/SiO2 ceramic particles using the sol–gel [...] Read more.
In light of the pressing environmental and health issues stemming from electromagnetic pollution, advanced electromagnetic wave absorbing materials are urgently sought to solve these problems. The present study delved into the fabrication of the resorcinol formaldehyde (RF)/SiO2 ceramic particles using the sol–gel route. From SEM images and XRD and XPS analysis, it can be seen that the RF/SiO2 ceramic particles are successfully generated after heat treatment at 1500 °C. At room temperature, the sample treated at 1500 °C exhibited a minimum reflection loss of −47.6 dB in the range of 2–18 GHz when the matching thickness was 5.5 mm, showcasing strong attenuation capabilities. Moreover, these particles demonstrated a considerable effective electromagnetic wave absorption bandwidth of 3.14 GHz, evidencing their potential for wideband electromagnetic wave absorption. The temperature adjustment played a pivotal role in achieving optimal impedance matching. When the heat treatment temperature is increased from 800 °C to 1500 °C, the dielectric properties of the material are improved, thus achieving the best impedance matching, thereby optimizing the material’s absorption properties for specific frequency ranges, which makes it possible to customize the electromagnetic wave-absorbing characteristics to meet specific requirements across a range of applications. Full article
(This article belongs to the Special Issue Properties of Ceramic Composites)
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