| 多孔SiC陶瓷/石蜡复合相变材料定型封装及热性能研究 |
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| 引用本文： | 徐照芸,罗团生,马登杰,海万秀,何思霖.多孔SiC陶瓷/石蜡复合相变材料定型封装及热性能研究[J].硅酸盐通报,2022,41(10):3658-3666. |
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| 作者姓名： | 徐照芸 罗团生 马登杰 海万秀 何思霖 |
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| 作者单位： | 1.北方民族大学材料科学与工程学院,银川 750021; 2.粉体材料与特种陶瓷重点实验室,银川 750021 |
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| 基金项目： | 宁夏自然科学基金(2020AAC03198);宁夏第六批青年科技人才托举工程(TJGC2021109) |
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| 摘 要： | 以微米级SiC粉为原料,采用冷冻干燥工艺制备具有连贯层状孔结构的SiC陶瓷。以多孔SiC陶瓷为基体,石蜡为相变芯材,通过真空浸渍法制备多孔SiC陶瓷/石蜡复合相变材料,研究了石蜡在层状多孔SiC陶瓷内的浸渗行为及复合材料的储热性能。结果表明,层片状多孔SiC陶瓷的显微形貌对石蜡的浸渗过程及储热性能有明显影响。当石蜡负载量为21.7%(质量分数)时,复合相变材料熔融温度为59.6 ℃,凝固温度为53.9 ℃,相变潜热为28.4 J/g,室温下的热导率为2.4 W·(m·K)-1。复合相变材料吸热峰和放热峰强度随着石蜡负载量减少而降低,当温度为200 ℃时,多孔SiC陶瓷/石蜡复合相变材料失重为5%(质量分数),表明材料具有良好的热稳定性。复合相变材料在100 ℃热处理30 min后陶瓷基体未发生形变,经100次热循环后具有稳定的相变潜热和良好的定型能力。
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| 关 键 词： | SiC陶瓷 复合相变材料 层状孔结构 石蜡 真空浸渍法 储热性能 |
| 收稿时间： | 2022-05-13 |
Stereotypes Package and Thermal Properties of Porous SiC Ceramics/Paraffin Composite Phase Change Materials |
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| XU Zhaoyun,LUO Tuansheng,MA Dengjie,HAI Wanxiu,HE Silin.Stereotypes Package and Thermal Properties of Porous SiC Ceramics/Paraffin Composite Phase Change Materials[J].Bulletin of the Chinese Ceramic Society,2022,41(10):3658-3666. |
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| Authors: | XU Zhaoyun LUO Tuansheng MA Dengjie HAI Wanxiu HE Silin |
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| Affiliation: | 1. School of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China; 2. Key Lab of Powder Material & Advanced Ceramics, Yinchuan 750021, China |
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| Abstract: | Porous silicon carbon (SiC) ceramics with coherent laminated structure were prepared by freeze-drying process with micron SiC powder as raw material. With porous SiC ceramics as matrix and paraffin as phase change material, the porous SiC ceramics/paraffin composite phase change materials were synthesized via vacuum impregnation method. Infiltration behavior of paraffin in laminated porous SiC ceramics and the heat storage performance and stability of composite phase change materials were investigated. The results show that the microstructure of laminated porous SiC ceramics has a significant effect on the infiltration process and heat storage properties of paraffin. When the paraffin load is 21.7% (mass fraction), the melting point and freezing point of composite phase change materials are 59.6 ℃ and 53.9 ℃, respectively, the latent heat of melting is 28.4 J/g, and the thermal conductivity at room temperature reaches 2.4 W·(m·K)-1. The intensity of endothermic and exothermic peaks of phase change materials decreases with decrease of paraffin load. When the temperature is 200 ℃, the weight loss of porous SiC ceramics/paraffin composite phase change materials is 5% (mass fraction), indicating that the material has good thermal stability. The composite phase change materials maintain its shape without any leakage after being treated in 100 ℃ for 30 min. The composite phase change materials aslo have stable latent heat and good shape stability after 100 thermal cycles. |
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| Keywords: | SiC ceramics composite phase change material laminated porous structure paraffin vacuum impregnation method heat storage performance |
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