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        Custom-made Ceramic
        and Glass Components

        Shapal?Hi-M soft Analysis

        Comparison of Shapal™-M soft with Shapal™ Hi-M soft and traditional ceramics

        This information is provided to help existing users of Shapal™-M soft compare it with the new Shapal™ Hi-M soft material and also to help users of traditional ceramics evaluate this machinable ceramic for their application.

        Comparison of flexural strengths and thermal conductivities (Typical Data)

        Data Supplied by Tokuyama Corporation, Tokyo, Japan

        Impurities

        Element Shapal™-M soft Shapal™ Hi-M soft
         C  300ppm 300ppm
        Ca 450ppm 1300ppm
        Cr 60ppm 1ppm
        Mg 15ppm 1ppm
        Ni <5ppm 2ppm
        Fe 20ppm 8ppm
        Si <15ppm 40ppm
        O 0.5% 0.9%
        Ti <1 <20
        Property/Test Conditions Shapal™-M soft Shapal™ Hi-M soft Units
        GENERAL      
        Density Corrected to 4°C 2.88 2.88 g/cm³
        Porosity 25°C 0 0 %
        ELECTRICAL      
        Volume Resistivity 25°C, DC 1.4 x 1012 1.0 x 1015 Ωcm 
        Dissipation Factor (tan δ) 25°C, 1MHz 9.1 x 10-4 10 x 10-4  
        Dielectric Constant (ε) 25°C, 1MHz 6.9 6.8  
        Dielectric Strength
        56 65 kV/mm
        THERMAL      
        Thermal Expansion Coefficient RT~400°C 4.4 x 10-6 4.8 x 10-6 /°C
        Thermal Expansion Coefficient RT~600°C 4.8 x 10-6 4.9 x 10-6 /°C
        Thermal Expansion Coefficient RT~800°C 5.1 x 10-6 5.0 x 10-6 /°C
        Thermal Conductivity 25°C 96 92 W/mK
        Maximum Use Temp. (in air) 1,000 1,000 °C
        Maximum Use Temp (in nonoxidizing atmosphere) 1,900 1,900 °C
        Thermal Shock Resistance ∆t water quench 400 400 °C
        MECHANICAL      
        Bending Strength 25°C 273 300 MPa 
        Compressive Strength 25°C 120 100 kg/mm2
        Young's Modulus 25°C 1.9 x 104 1.8 x 104 kg/mm2
        Poisson's Ratio 25°C 0.31 0.31  
        Vickers Hardness (Hv) 25°C, 300g 390 380 kg/mm2
        CHEMICAL DURABILITY      
        Resistance to Acid 10%HCI 24Hrs, 25°C 0.2 0.2 mg/cm2 wt loss
        Resistance to Base 10%NaOH 24Hrs, 25°C 60 60 mg/cm2 wt loss

        Note:  Shapal™ is a registered trademark of Tokuyama Corporation, Tokyo, Japan

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