Investigation on Properties of Modified Expanded Vermiculite/ Forsterite Composite Materials

Abstract

The mechanical and thermal insulation properties of expanded vermiculite (EV)/ forsterite composite materials before and after the modification of EV were characterized by three-point bending test, compressive strength test and flat plate method. The results showed that by increasing the modified EV content, the mechanical properties and thermal insulation properties of composite materials were significantly improved. When the substitution rate of modified EV was 50wt%, the flexural and compressive strength were 11.55MPa and 22.80MPa, improved by 23.8% and 44.9%, respectively, compared with the unmodified sample; and the thermal conductivity was 0.168 W/M·K (at the testing temperature was 800℃ ), improved by 30.5%.