网格布增强硫氧镁发泡水泥力学性能和吸波特性

关键字：玻纤网格布；硫氧镁发泡水泥；力学性能；吸波

（1.海南大学 材料与化工学院，海南 海口  570228；2.海南热带岛屿资源先进材料教育部重点实验室，海南 海口  570228）
 

    摘要：采用物理发泡法制备了玻纤网格布增强硫氧镁发泡水泥，对其力学性能和吸波性能进行了研究。结果表明：对于干密度在800~850 kg/m3的硫氧镁发泡水泥，玻纤网格布可有效提高材料的抗折强度，而抗压强度基本保持不变；当玻纤网格布为3层/cm时，材料的电磁波吸收效果较好，而厚度的增加可进一步改善材料的吸波性能。对材料进行双层夹膜结构设计，当总厚度为8 mm，夹膜阻值为400 Ω/□时，在2.6~18 GHz的吸收量均低于-10 dB。通过玻纤网格布的增强和双层夹膜设计，实现了硫氧镁发泡水泥在保持较好力学性能的同时对吸波性能的改善。

    关键词：玻纤网格布；硫氧镁发泡水泥；力学性能；吸波特性

    中图分类号：TU528.2        文献标识码：A        文章编号：1001-702X（2018）05-0116-05

 

Mechanical properties and electromagnetic wave absorption properties of magnesium oxysulfate foam cement reinforced with fiberglass mesh 

HE Nan1，2，HAO Wanjun1，2，LIU Changzai1，2，RU Haifeng2，CHEN Weipeng2，ZHAO Xu2

（1.College of Materials & Chemical Engineering，Hainan University，Haikou 570228，China；

2.Hainan Tropical Island Resources Ministry of Education Key Laboratory of Advanced Materials，Haikou 570228，China）

  Abstract：This paper uses the physical foaming method to make the fiberglass gridding cloth stiffened porous magnesium oxysulfate cement，and studies on its mechanical properties and wave absorption properties. The results show that for porous magnesium oxysulfate cement with the dry density of 800~850 kg/m3，the use of fiberglass gridding cloth could effectively increase the bending strength of the material，while the compressive strength remains unchanged；when the fiberglass gridding cloth is added to 3 layers/cm，the electromagnetic wave absorption effect is preferable，and the increasing of the thickness could further improve the absorption property of the material. The design of double-layer filming structure to the material shows that when the overall thickness is 8 mm and the resistance value of the collapsing is 400 Ω/□，the absorption amount is superior to -10 dB in 2.6~18 GHz. By enhancing fiberglass fridding cloth and designing double-layer capsule，the mechanical property of multihole magnesium oxysulfate cement is maintained，meanwhile，its absorbing property is also improved. 

    Key words：fiberglass mesh，magnesium oxysulfate foam cement，mechanical property，electromagnetic wave absorption property