Microstructure, Mechanical Property and Thermal Conductivity of Porous TiCO Ceramic Fabricated by In Situ Carbothermal Reduction of Phenolic Resin and Titania
The porous TiCO ceramic was synthesized through a one-step sintering method, utilizing phenolic resin, TiO<sub>2</sub> powder, and KCl foaming agent as raw materials. Ni(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O was incorporated as a catalyst to faci...
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| Format: | Article |
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MDPI AG
2024-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/6/515 |
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| author | Xiaoyu Cao Chenhuan Wang Yisheng Li Zehua Zhang Lei Feng |
| author_facet | Xiaoyu Cao Chenhuan Wang Yisheng Li Zehua Zhang Lei Feng |
| author_sort | Xiaoyu Cao |
| collection | DOAJ |
| description | The porous TiCO ceramic was synthesized through a one-step sintering method, utilizing phenolic resin, TiO<sub>2</sub> powder, and KCl foaming agent as raw materials. Ni(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O was incorporated as a catalyst to facilitate the carbothermal reaction between the pyrolytic carbon and TiO<sub>2</sub> powder. The influence of Ni(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O catalyst content (0, 5, 10 wt.% of the TiO<sub>2</sub> powder) on the microstructure, compressive strength, and thermal conductivity of the resultant porous TiCO ceramic was examined. X-ray diffraction and X-ray photoelectron spectroscopy results confirmed the formation of TiC and TiO in all samples, with an increase in the peak of TiC and a decrease in that of TiO as the Ni(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O content increased from 0% to 10%. Scanning electron microscopy results demonstrated a morphological change in the pore wall, transforming from a honeycomb-like porous structure composed of well-dispersed carbon and TiC-TiO particles to rod-shaped TiC whiskers, interconnected with each other as the catalyst content increased from 0% to 10%. Mercury intrusion porosimetry results proved a dual modal pore-size distribution of the samples, comprising nano-scale pores and micro-scale pores. The micro-scale pore size of the samples minorly changed, while the nano-scale pore size escalated from 52 nm to 138 nm as the catalyst content increased from 0 to 10%. The morphology of the pore wall and nano-scale pore size primarily influenced the compressive strength and thermal conductivity of the samples by affecting the load-bearing capability and solid heat-transfer conduction path, respectively. |
| first_indexed | 2024-04-24T17:56:59Z |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-04-24T17:56:59Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-2d2a1f297d2647fcab9b750b6837886d2024-03-27T13:57:34ZengMDPI AGNanomaterials2079-49912024-03-0114651510.3390/nano14060515Microstructure, Mechanical Property and Thermal Conductivity of Porous TiCO Ceramic Fabricated by In Situ Carbothermal Reduction of Phenolic Resin and TitaniaXiaoyu Cao0Chenhuan Wang1Yisheng Li2Zehua Zhang3Lei Feng4Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaShaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaShaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaShaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaShaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaThe porous TiCO ceramic was synthesized through a one-step sintering method, utilizing phenolic resin, TiO<sub>2</sub> powder, and KCl foaming agent as raw materials. Ni(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O was incorporated as a catalyst to facilitate the carbothermal reaction between the pyrolytic carbon and TiO<sub>2</sub> powder. The influence of Ni(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O catalyst content (0, 5, 10 wt.% of the TiO<sub>2</sub> powder) on the microstructure, compressive strength, and thermal conductivity of the resultant porous TiCO ceramic was examined. X-ray diffraction and X-ray photoelectron spectroscopy results confirmed the formation of TiC and TiO in all samples, with an increase in the peak of TiC and a decrease in that of TiO as the Ni(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O content increased from 0% to 10%. Scanning electron microscopy results demonstrated a morphological change in the pore wall, transforming from a honeycomb-like porous structure composed of well-dispersed carbon and TiC-TiO particles to rod-shaped TiC whiskers, interconnected with each other as the catalyst content increased from 0% to 10%. Mercury intrusion porosimetry results proved a dual modal pore-size distribution of the samples, comprising nano-scale pores and micro-scale pores. The micro-scale pore size of the samples minorly changed, while the nano-scale pore size escalated from 52 nm to 138 nm as the catalyst content increased from 0 to 10%. The morphology of the pore wall and nano-scale pore size primarily influenced the compressive strength and thermal conductivity of the samples by affecting the load-bearing capability and solid heat-transfer conduction path, respectively.https://www.mdpi.com/2079-4991/14/6/515porous ceramiccarbothermal reductioncatalyst contentmechanical propertythermal conductivity |
| spellingShingle | Xiaoyu Cao Chenhuan Wang Yisheng Li Zehua Zhang Lei Feng Microstructure, Mechanical Property and Thermal Conductivity of Porous TiCO Ceramic Fabricated by In Situ Carbothermal Reduction of Phenolic Resin and Titania Nanomaterials porous ceramic carbothermal reduction catalyst content mechanical property thermal conductivity |
| title | Microstructure, Mechanical Property and Thermal Conductivity of Porous TiCO Ceramic Fabricated by In Situ Carbothermal Reduction of Phenolic Resin and Titania |
| title_full | Microstructure, Mechanical Property and Thermal Conductivity of Porous TiCO Ceramic Fabricated by In Situ Carbothermal Reduction of Phenolic Resin and Titania |
| title_fullStr | Microstructure, Mechanical Property and Thermal Conductivity of Porous TiCO Ceramic Fabricated by In Situ Carbothermal Reduction of Phenolic Resin and Titania |
| title_full_unstemmed | Microstructure, Mechanical Property and Thermal Conductivity of Porous TiCO Ceramic Fabricated by In Situ Carbothermal Reduction of Phenolic Resin and Titania |
| title_short | Microstructure, Mechanical Property and Thermal Conductivity of Porous TiCO Ceramic Fabricated by In Situ Carbothermal Reduction of Phenolic Resin and Titania |
| title_sort | microstructure mechanical property and thermal conductivity of porous tico ceramic fabricated by in situ carbothermal reduction of phenolic resin and titania |
| topic | porous ceramic carbothermal reduction catalyst content mechanical property thermal conductivity |
| url | https://www.mdpi.com/2079-4991/14/6/515 |
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