Abstract This work investigated the effect of microwave power on vermiculite expansibility for different exposure time and compared the changes after Mg2+ modification. The expansion ratio of the modified vermiculite sample reached up to 5.29 at 800 W with a significant increase of 23.89 % in contrast to the raw vermiculite sample. Aimed to quantify the microwave energy absorption of vermiculite, a novel method was proposed by employing water as a medium material due to its sensitivity to microwave energy. Using this method, the effect of microwave power on microwave energy absorption of vermiculite was studied. Meanwhile, the influence mechanism of Mg2+ modification on microwave energy absorption of vermiculite was analyzed by means of energy dispersive X-ray spectroscopy and thermogravimetric-differential scanning calorimeter. Mg2+ modification could significantly improve the microwave energy absorption ability of vermiculite, which was mainly ascribed to the increase of interlayer water content through Mg2+ hydration reaction.

中文翻译：

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蛭石膨胀过程微波能量吸收定量分析新方法

摘要 本工作研究了微波功率对不同暴露时间的蛭石膨胀性的影响，并比较了Mg2+改性后的变化。改性蛭石样品的膨胀率在 800 W 时达到 5.29，与原始蛭石样品相比显着增加了 23.89%。为了量化蛭石的微波能量吸收，由于其对微波能量的敏感性，提出了一种以水为介质材料的新方法。利用该方法研究了微波功率对蛭石微波能量吸收的影响。同时，利用能量色散X射线光谱仪和热重-差示扫描量热仪分析了Mg2+改性对蛭石微波能量吸收的影响机理。