• MULLITE

    Lightweight Alumino-Silicate Bubbles Delivering Exceptional Thermal Insulation and Structural Stability at High Temperatures

    Mullite is a lightweight, alumino-silicate ceramic material valued for its exceptional thermal insulation, low thermal conductivity, and high mechanical stability at elevated temperatures. Composed mainly of alumina (Al₂O₃) and silica (SiO₂), it offers outstanding resistance to creep, corrosion, and thermal shock, making it ideal for high-temperature industrial applications such as refractories and kilns.

    IMB Mullite Bubbles | Saint-Gobain Refractory Zirconia

    Type & Characteristics

    IMB Mullite Bubbles are hollow, spherical particles with a porous structure and excellent flowability. Manufactured under controlled conditions to achieve uniform wall thickness and strength, these bubbles provide superior insulation performance while reducing overall weight in refractory formulations. Their spherical morphology ensures even packing, low bulk density, and improved thermal efficiency.

    • Material Composition: Alumina-Silicate (Al₂O₃–SiO₂) ceramic system.
    • Structure: Porous, hollow spherical grains with smooth surface and controlled particle size distribution.
    • Performance Benefits: Excellent insulation, low density, good flowability, and high thermal shock resistance.

    Industrial Relevance

    IMB Mullite Bubbles are widely used in high-temperature insulation, lightweight refractory castables, and energy-efficient furnace linings. Their unique microstructure allows engineers to design materials that maintain strength and thermal efficiency while minimizing weight and energy consumption.

     

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  • Typical Properties and Performance Benefits of IMB Mullite Bubbles

    The table below summarizes the key physical and chemical characteristics of IMB Mullite Bubbles and their corresponding advantages in high-temperature applications.

    PropertyTypical Value / DescriptionPerformance BenefitTypical Application
    Chemical CompositionAl₂O₃: 55–60%, SiO₂: 35–40%Stable alumino-silicate structure offering high thermal shock resistance and low reactivity with slags and molten metals.Refractory insulation, high-temperature castables
    Bulk Density0.3–0.6 g/cm³ (typical)Enables lightweight formulations, reduced material usage, and improved thermal efficiency.Lightweight refractory bricks, insulating linings
    Particle Size Range0.2–5 mm (customizable)Allows tailored packing density and mechanical strength for various insulation designs.Castables, mortars, and coatings
    RefractorinessUp to 1750 °CEnsures long-term thermal stability and durability under repeated heating cycles.Furnaces, kilns, and ladle covers
    Thermal Conductivity≤ 0.2 W/m·K at 1000 °CReduces heat loss and energy consumption while maintaining structural integrity.Energy-efficient insulation systems
    FlowabilityExcellent due to spherical morphologySimplifies mixing and ensures uniform distribution in refractory and composite matrices.Refractory castables, lightweight concrete
    Packing1 MT / big bagConvenient bulk packaging for industrial production and transport.Bulk refractory and insulation supply

  • Technical Datasheets

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      IMB Mullite Bubbles - TDS.pdf
      Technical Datasheets (TDS)
      IMB Mullite Bubbles - TDS.pdf
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