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多孔微波吸收功能集料制备及性能研究
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国家自然科学基金资助项目(51461135005)


Preparation and Properties of Porous Microwave Absorption Functional Aggregate
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    摘要:

    采用页岩、有机物(米粒)、锰锌铁氧体，通过模板法烧结制备多孔微波吸收功能集料，研究了该集料以及用该集料制备的功能砂浆的微波吸收性能.结果表明：在本体系中，在1000℃下烧结30min后，即可制备出孔结构可控且抗压强度为65MPa的多孔微波吸收功能集料；孔径为245～833μm、有机物掺量为25%时，微波辐照30s的功能集料和功能砂浆微波辐照温升最高，可分别从室温升至2188、1194℃，功能砂浆融冰时间为485s；多孔结构能改善功能集料与自由空间阻抗匹配，吸收损耗更多微波，明显增强功能集料和功能砂浆的微波吸收能力，提高其微波辐照温升.

    Abstract:

    The microwave absorption properties of porous microwave absorption functional aggregate and mortar prepared by template sintering were studied by using shale, organic matter(rice) and Mn Zn ferrite. The results show that in this system, the porous microwave absorption functional aggregate with controllable pore structure and compressive strength of 65MPa can be prepared after sintering at 1000℃ for 30min. When the pore diameter is 245833μm and the content of organic matter is 25%, the temperature rise of functional aggregate and functional mortar irradiated by microwave for 30s is the highest, which can rise from room temperature to 2188℃ and 1194℃ respectively, and the melting time of functional mortar is 485s. The porous structure can improve the impedance match between functional aggregate and free space, absorb more microwave, significantly enhance the microwave absorption capacity of functional aggregate and functional mortar, and increase the temperature rise of microwave irradiation.

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王智,何坚,王子仪,梁淑哲,刘振华.多孔微波吸收功能集料制备及性能研究[J].建筑材料学报,2021,24(1):106-114

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  • 收稿日期:2019-08-12
  • 最后修改日期:2020-01-25
  • 在线发布日期: 2021-03-09
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