Dispersing of functionalized CNTs in Si–O–C ceramics and electromagnetic wave absorbing and mechanical properties of CNTs/Si–O–C nanocomposites

Ding, Donghai; Wang, Jing; Yu, Xinquan; Xiao, Guoqing; Feng, Chao; Xu, Wentao; Bai, Bing; Yang, Ning; Gao, Yunqin; Hou, Xing; He, Guoqiang

doi:10.1016/j.ceramint.2019.10.297

Cited by 64 publications

(31 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In summary, the microwave-absorbing properties of MPAM are closely related to its thickness in the pavement structure and frequency of microwaves. Optimal absorbance efficiency can be achieved when a matching thickness of MPAM is subjected to microwave radiation at a matching frequency [35][36][37][38]. More work on the matching thickness and matching frequency should be done in future research.…”

Section: Low-temperature Propertiesmentioning

confidence: 99%

Investigation of the Microwave Absorption of Asphalt Mixtures Containing Magnetite Powder

et al. 2019

View full text Add to dashboard Cite

This article is intended to investigate the microwave heating performance of asphalt mixtures containing magnetite powders (MPAM). For this purpose, the surface temperatures of asphalt mixtures containing different dosages of magnetite powders were measured during microwave heating. The low-temperature bending test and water sensitivity test were also conducted to evaluate the performance of MPAM. Heating rate and reflection loss of different thicknesses of MPAM were determined using a microwave heating test and arch reflectivity test, respectively. The results showed that because its main components are triiron tetroxide and iron oxide, which have excellent microwave-absorbing properties, magnetite powders can be used as microwave absorbers to improve the ability of microwave absorption and increase the heating rate of asphalt mixtures. The heating rate of the asphalt mixtures increased with the increase of the amount of magnetite powder. The addition of magnetite powder improved the low-temperature properties of the asphalt mixture, but it reduced the water stability of the asphalt mixture. Considering that the microwave-absorbing asphalt mixture used for melting snow and ice should have good water stability, the recommended dosage of magnetite powders was 60%. The microwave-absorbing properties of MPAM were related to its thickness in the pavement structure and frequency of microwaves. In order to greatly enhance the absorbing efficiency, future work should be focused on matching thickness and matching frequency.

show abstract

Section: Low-temperature Propertiesmentioning

confidence: 99%

Investigation of the Microwave Absorption of Asphalt Mixtures Containing Magnetite Powder

et al. 2019

View full text Add to dashboard Cite

show abstract

“…There are normally various ways of doping. The most commonly used route is to uniformly mix the uncrosslinked or the crosslinked precursor polymer with the dopants directly by magnetic stirring, ultrasonic dispersion, or ball milling [8,14,27,28,41,44,45]. For example, Guo's group [14] used an inorganic metal salt as a metal source and directly mixed it with a precursor polymer to prepare a metal-doped polymer-derived SiOC composite material, in which the electrical conductivity of Cu-doped SiOC ceramic was 9.32 × 10 −2 S•cm −1 .…”

Section: Functionalization Techniquesmentioning

confidence: 99%

“…An excellent electromagnetic wave absorbing material should meet the following requirements [55]: (i) strong absorption capacity and impedance matching characteristics, which means small reflection coefficient (RC min ); (ii) wide effective absorption bandwidth (EAB, RC min is less than the corresponding frequency range of −10 dB); (iii) low density and high temperature stability; (iv) good mechanical properties. Among all electromagnetic wave absorbing materials, PDCs have attracted increasing attention due to their controllable microstructure, lightweight, outstanding mechanical properties, and wide absorption [19,27,28,30,32,44,45,82] features.…”

Section: Dielectric and Electromagnetic Wave Absorption Propertiesmentioning

confidence: 99%

“…The recent research progress and trends of PDCs are to functionalize them through various methods (such as additive doping [30,31,[41][42][43][44][45]) and to combine PDCs with 3D printing [4,10,[13][14][15]29,46] to explore new techniques to fabricate PDCs. By functionalizing PDCs, they have excellent mechanical, thermal, electrical, and dielectric properties.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polymer-Derived Si-Based Ceramics: Recent Developments and Perspectives

et al. 2020

View full text Add to dashboard Cite

Polymer derived ceramics (PDCs) are promising candidates for usages as the functionalization of inorganic Si-based materials. Compared with traditional ceramics preparation methods, it is easier to prepare and functionalize ceramics with complex shapes by using the PDCs technique, thereby broadening the application fields of inorganic Si-based ceramics. In this article, we summarized the research progress and the trends of PDCs in recent years, especially most recent three years. Fabrication techniques (traditional preparation, 3D printing, template method, freezing casting techniques, etc.), microstructural tailoring mainly via additive doping, and properties (mechanical, thermal, electrical, as well as dielectric and electromagnetic wave absorption properties) of Si-based PDCs were explicated. Meanwhile, challenges and perspectives for PDCs techniques were proposed as well, with the purpose to enlighten multiple functionalized applications of polymer-derived Si-based ceramics.

show abstract

“…First, the MWCNTs were placed into an F‐P4000 planetary grinder for ball grinding, followed by ultrasonic treatment; then they were purified and oxidized in a mixture of concentrated sulfuric acid and concentrated nitric acid 18,19 . The surface of the treated MWCNTs generated defects, resulting in surface roughness increase.…”

Section: Experimental Process Of Sample Preparationmentioning

confidence: 99%

Improvement in mechanical properties of enamel via carbon nanotube addition

Wang

Zhang

et al. 2020

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Enameled metal equipment exploits the strength of metal materials and the corrosion resistance of enamel; therefore, it is widely used in the chemical industry. However, the mechanical properties of the enamel restrict its service life. Multi‐walled carbon nanotubes (MWCNTs) are one‐dimensional nanomaterials with high‐specific surface area, C–C bond structure, and SP2 hybrid orbital. Herein, the effect of the dosage of MWCNTs on the mechanical properties of enamel is studied by adding MWCNTs to improve the mechanical properties of the enamel. Microscopic observation showed that the toughening mechanism of MWCNTs was mainly manifested in fracture and pull out behaviors. According to three‐point bending test, when 0.4 wt% carbon nanotubes were added, the reinforcing effect of enamel layer reached the best state. These results provide reference for optimizing the formulation of enamel and extending the service life of enamel.

show abstract

Dispersing of functionalized CNTs in Si–O–C ceramics and electromagnetic wave absorbing and mechanical properties of CNTs/Si–O–C nanocomposites

Cited by 64 publications

References 39 publications

Investigation of the Microwave Absorption of Asphalt Mixtures Containing Magnetite Powder

Investigation of the Microwave Absorption of Asphalt Mixtures Containing Magnetite Powder

Polymer-Derived Si-Based Ceramics: Recent Developments and Perspectives

Improvement in mechanical properties of enamel via carbon nanotube addition

Contact Info

Product

Resources

About