Preparation and Study on a New Type of Anti-Electromagnetic Radiation Gypsum Board

Abstract

Electromagnetic radiation has become a great threat to human health. In this paper, ferrite and graphite were main absorbing agent, which were prepared to a new type of anti-electromagnetic radiation gypsum board. The results show that the microwave absorbing properties of ferrite/graphite mixed are better than with ferrite or graphite single-agent mixed. The gypsum board with the graphite content of 5wt% and the ferrite content of 25wt% has the best absorbing performance, The effective band width less than-5dB of the samples is 7.1311GHz, and the maximum absorption peak-18.467dB.

Mechanical and conductive performance of electrically conductive cementitious composite using graphite, steel slag, and GGBS

“…Li et al 19,20 confirmed that chemical vapor deposition treatment upon carbon fibers at 0.2 wt% fraction significantly influenced the concrete's conductivity. Wang et al 21 explored carbon black incorporated hydroxyl iron powder‐epoxy resin as a conductive composite and validated a 95.6% of microwave absorption. However, the GP obtains a relatively smooth texture in microscale, which creates a lubrication effect and negates the micro‐bonding force as well as the macro‐mechanical performance of the ECCC 22,23 .…”