STP789: Glass-Mica Composite: A New Structural Thermal-Insulating Material for Building Applications

    Low, NMP
    Research Assistant Professor, Center for Building Studies, Concordia University, Montreal, Quebec

    Pages: 15    Published: Jan 1983


    Abstract

    Homogeneous, rigid glass-mica composites have been synthesized from mixtures of Canadian natural mica flakes of the phlogopite type and ground glass powders prepared from recycled soda-lime waste glasses by a simple sintering process. By means of selection of compositions and processing techniques, composites can be fabricated into products that exhibit a cellular structure, a highly densified structure, and multilayer and sandwich structures. The cellular structure composite has a thermal conductivity in the range of 0.165 to 0.230 W/m·°C when measured over the temperature range 25 to 180°C, and a compressive strength of about 0.874 MPa; the highly densified composite, on the other hand, has a thermal conductivity in the range of 0.155 to 0.330 W/m·°C, a compressive strength in excess of 40 MPa, and an instantancous coefficient of thermal expansion of 5.8 × 10−6/°C at 100°C. These glass-mica composites exhibit qualities such as insulating efficiency, safety, mechanical strength, and durability that are suitable for engineering applications in building structures or other systems.

    Keywords:

    rigid thermal insulator, phlogopite mica, waste glass, cellular and densified (ceramics), multilayer and sandwich (products), mechanical strength, thermal conductivity, durability, saturation coefficient


    Paper ID: STP29482S

    Committee/Subcommittee: C16.16

    DOI: 10.1520/STP29482S


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