Electrical properties and electromagnetic radiation characteristics of cement/Ba0.06Bi0.47Na0.47TiO3 composites

Abstract

The study examined the emission of electromagnetic radiation (EMR) from cement/Ba0.06Bi0.47Na0.47TiO3 (BBNT) composites when subjected to drop weight impact loads, aiming to explore their potential as sensors in civil structures. The generation of EMR in this context can be attributed to the increased movement of ions within pores and dipole oscillation along the grain boundaries of BBNT. The increase of BBNT content and impact load cause a noticeable rise in the values of EMR voltage, dominant frequency and the average rate of EMR energy release. Notably, the impact-generated EMR voltage data can be excellently fitted with a 5th-order bivariate polynomial function (adjusted r2 = 0.9353). Furthermore, the EMR voltage exhibits a decreasing pattern when measured at various distances from the sample, until it stabilizes after 12 cm. These findings suggest that the EMR technique holds promise as an effective tool for real-time monitoring of civil structures in situ.