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用杉木木粉浸渍高分子先驱体有机硅树脂,改变烧结温度和保温时间制备SiOC多孔木质陶瓷。用X射线衍射、扫描电子显微镜、红外光谱及热分析对样品的物相及微观结构进行了表征,并用四探针法测试样品的电学性能。结果表明:样品由SiOC玻璃相、α-石英和自由碳组成,化学结构主要含有Si—O,Si—O—R,Si—C,C=C和C—H2。α-石英颗粒呈球状分布在样品的孔洞表面。样品在Ar中具有较好的热稳定性。但由于SiOC玻璃相和自由碳的氧化反应,样品在O2中的质量损失较大。当烧结温度达1200℃,保温1h时,样品具有较低的体积电阻率(0.03.cm)。
Impregnated polymer resin with fir wood powder, SiOC porous wood ceramics were prepared by changing the sintering temperature and holding time. The phase and microstructure of the samples were characterized by X-ray diffraction, scanning electron microscopy, infrared spectroscopy and thermal analysis, and the electrical properties of the samples were tested by four-probe method. The results show that the sample consists of SiOC glass phase, α-quartz and free carbon. The chemical structure mainly contains Si-O, Si-O-R, Si-C, C = C and C-H2. α-quartz particles are spherical distribution in the sample hole surface. The sample has better thermal stability in Ar. However, due to the oxidation of SiOC glass phase with free carbon, the mass loss of sample in O2 is larger. The samples have lower volume resistivity (0.03.cm) when sintered at 1200 ℃ for 1h.