Performance Optimization of SiO<sub>2f</sub>/SiO<sub>2</sub> Composites Derived from Polysiloxane Ceramic Precursors
In this paper, polymethylhydrosiloxane (PMHS) and ethanol were used as raw materials to synthesize the ceramic precursor of side ethoxy polysiloxane (PESO) using dehydration and a dealcoholization reaction, which had a ceramic yield of 87.15% and a very low residual carbon content. With the quartz f...
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MDPI AG
2025-03-01
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| author | Xia Zhang Bo Xiao Yongzhao Hou Guangwu Wen |
| author_facet | Xia Zhang Bo Xiao Yongzhao Hou Guangwu Wen |
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| description | In this paper, polymethylhydrosiloxane (PMHS) and ethanol were used as raw materials to synthesize the ceramic precursor of side ethoxy polysiloxane (PESO) using dehydration and a dealcoholization reaction, which had a ceramic yield of 87.15% and a very low residual carbon content. With the quartz fiber as a reinforcer, the silica matrix composites (SiO<sub>2f</sub>/SiO<sub>2</sub>) with a double-layer interface (PyC-SiO<sub>2</sub>/BNNSs) coating were manufactured using precursor impregnation pyrolysis (PIP). The as-prepared SiO<sub>2f</sub>/SiO<sub>2</sub> possessed an excellent mechanical property, which exhibited obvious fiber pull-out and debonding phenomena from a fracture morphology. The flexural strength and fracture toughness of SiO<sub>2f</sub>/SiO<sub>2</sub> reached 63.3 MPa and 2.52 MPa·m<sup>1/2</sup>, respectively. Moreover, the SiO<sub>2f</sub>/SiO<sub>2</sub> had suitable dielectric properties, with a dielectric constant of about 2.5 and a dielectric loss of less than 0.01. This work provides an important concept for the enhancement of the dielectric properties and mechanical properties of quartz fiber-reinforced ceramic matrix composites, as well as in the preparation of wave-transmissivity composites. |
| format | Article |
| id | doaj-art-7b742d3cd18e448f9f66d936d46e53fd |
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| language | English |
| publishDate | 2025-03-01 |
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| spelling | doaj-art-7b742d3cd18e448f9f66d936d46e53fd2025-08-20T01:49:05ZengMDPI AGMolecules1420-30492025-03-01306138510.3390/molecules30061385Performance Optimization of SiO<sub>2f</sub>/SiO<sub>2</sub> Composites Derived from Polysiloxane Ceramic PrecursorsXia Zhang0Bo Xiao1Yongzhao Hou2Guangwu Wen3School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255000, ChinaSchool of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255000, ChinaSchool of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, ChinaSchool of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255000, ChinaIn this paper, polymethylhydrosiloxane (PMHS) and ethanol were used as raw materials to synthesize the ceramic precursor of side ethoxy polysiloxane (PESO) using dehydration and a dealcoholization reaction, which had a ceramic yield of 87.15% and a very low residual carbon content. With the quartz fiber as a reinforcer, the silica matrix composites (SiO<sub>2f</sub>/SiO<sub>2</sub>) with a double-layer interface (PyC-SiO<sub>2</sub>/BNNSs) coating were manufactured using precursor impregnation pyrolysis (PIP). The as-prepared SiO<sub>2f</sub>/SiO<sub>2</sub> possessed an excellent mechanical property, which exhibited obvious fiber pull-out and debonding phenomena from a fracture morphology. The flexural strength and fracture toughness of SiO<sub>2f</sub>/SiO<sub>2</sub> reached 63.3 MPa and 2.52 MPa·m<sup>1/2</sup>, respectively. Moreover, the SiO<sub>2f</sub>/SiO<sub>2</sub> had suitable dielectric properties, with a dielectric constant of about 2.5 and a dielectric loss of less than 0.01. This work provides an important concept for the enhancement of the dielectric properties and mechanical properties of quartz fiber-reinforced ceramic matrix composites, as well as in the preparation of wave-transmissivity composites.https://www.mdpi.com/1420-3049/30/6/1385polysiloxaneprecursorinterfacequartz fiber reinforced ceramic matrix compositesdielectric property |
| spellingShingle | Xia Zhang Bo Xiao Yongzhao Hou Guangwu Wen Performance Optimization of SiO<sub>2f</sub>/SiO<sub>2</sub> Composites Derived from Polysiloxane Ceramic Precursors Molecules polysiloxane precursor interface quartz fiber reinforced ceramic matrix composites dielectric property |
| title | Performance Optimization of SiO<sub>2f</sub>/SiO<sub>2</sub> Composites Derived from Polysiloxane Ceramic Precursors |
| title_full | Performance Optimization of SiO<sub>2f</sub>/SiO<sub>2</sub> Composites Derived from Polysiloxane Ceramic Precursors |
| title_fullStr | Performance Optimization of SiO<sub>2f</sub>/SiO<sub>2</sub> Composites Derived from Polysiloxane Ceramic Precursors |
| title_full_unstemmed | Performance Optimization of SiO<sub>2f</sub>/SiO<sub>2</sub> Composites Derived from Polysiloxane Ceramic Precursors |
| title_short | Performance Optimization of SiO<sub>2f</sub>/SiO<sub>2</sub> Composites Derived from Polysiloxane Ceramic Precursors |
| title_sort | performance optimization of sio sub 2f sub sio sub 2 sub composites derived from polysiloxane ceramic precursors |
| topic | polysiloxane precursor interface quartz fiber reinforced ceramic matrix composites dielectric property |
| url | https://www.mdpi.com/1420-3049/30/6/1385 |
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