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  • Applications of Zirconia Structural Ceramics
    Applications of Zirconia Structural Ceramics
    2022-07-06

        Zirconia structural ceramic possesses a series of excellent properties, including high toughness, high bending strength, high wear resistance, outstanding heat-insulation, and its coefficient of thermal expansion is closed to that of steel. In this article, applications of zirconia structural ceramics would be briefly introduced.     Zirconia structural ceramic is usually used as heatproof ceramic coating and high-temperature refractory for its favorable chemical stability, thermal stability and thermal shock resistance. Besides, zirconia structural ceramics could also be applied on other refractories in order to improve their fire resistance.   The refractory materials of zirconia structural ceramic are basically including zirconia sizing nozzles, zirconia ceramic crucibles, zirconia ceramic refractory fiber, zircon-corundum refractory brick, zirconia refractory hollow ball, etc., which are mainly used in the field of metallurgy industry and silicate industry.       Zirconia structural ceramic is extensively used as engineering ceramic for its excellent physical and mechanical properties, including ceramic bars, ceramic tubes and ceramic rolls. The service life and stability of zirconia structural ceramics are superior to traditional sliding bearings and rolling bearings.     Zirconia ceramic could be used as a kind of precision ceramic parts, such as engine cylinder liner and piston ring, which can improve thermal efficiency while reducing machine’s weight.     Zirconia structural ceramic valve is able to substitute traditional metal alloy valve, especially under extremely harsh working conditions, zirconia structural ceramics can improve service life greatly by reducing abrasion and enhancing corrosion resistance effectively.     Zirconia ceramic materials can be used to manufacture ceramic knives, which are sharper than traditional steel knives.

  • The Features of Alumina Ceramic and Zirconia Ceramic
    The Features of Alumina Ceramic and Zirconia Ceramic
    2022-07-01

    Among new ceramic materials, alumina ceramic and zirconia ceramic are quite outstanding and widely used for their various excellent performance. In this article, features of these two kinds materials are briefly introduced. *Features of alumina ceramic: Alumina ceramic is well-known for its low permittivity, low dielectric loss, high dielectric strength, high volume resistivity, wonderful Flexural Strength, terrific stability, preferable compressive strength and acceptable denaturation of cold and heat shock. Thermal insulation ceramic, 95 alumina ceramic and 99 alumina ceramic are widely used in thermostat of household appliances, insulation parts, thermal equipment, iron-structured construction and ship construction, etc. Alumina Ceramic Parameter Table PROPERTIES UNIT VALUE Density g/cm3 3.7 Hardness HRA ≥86 Bending Strength Mpa ≥300 Max. Working Temperature ℃ 1500 Thermal Expansion ×10-6/℃ 7.15-7.67 Permittivity εr(20℃,1MHz) 9.21 Dielectric Loss tanδ×10-4,1MHz 2.5 Volume Resistivity Ω·cm(100℃) 9.2*1016 Compressive Strength Mpa 2500 Elasticity Modulus Gpa 300 Poisson's ratio / 0.2 Thermal Conductivity W/m·K(20℃) 20 *Features of zirconia ceramic: Zirconia ceramic has a series of excellent properties, for instance, high hardness, preferable wear resistance, high toughness, low friction coefficient and terrific corrosion resistance. It is extensively used in the field of machine sealing, grinding medium, cutting tools, ceramic bearing, auto engine parts and dehydration equipment for paper manufacturing. The wear resistance of zirconia ceramic is as 15 times as that of alumina ceramic, but the friction coefficient of zirconia ceramic is merely as 0.5 times as that of alumina ceramic. Zirconia ceramics with fine texture have been polished, then a smoother surface could be obtained, whose surface roughness and friction coefficient are more desirable. Zirconia Ceramic Parameter Table PROPERTIES UNIT VALUE Density g/cm3 6.05 Water Absorption % 0 Thermal Expansion ×10-6/℃ 10.5 Young’s Modulus of Elasticity Gpa 210 Poisson's ratio / 0.3 Hardness(HV) MPa 1200 Bending Strength (indoor temperature) MPa 950 Bending Strength (700℃) MPa 210 Compressive Strength (indoor temperature) MPa 2000 Fracture Toughness Mpa.m1/2 10 Thermal Conductivity (indoor temperature) W/m.k 2 Specific Resistivity (indoor temperature) Ω.mm2/m >1015 Max. Working Temperature ℃ 1350 Acid and alkali corrosion resistance / Intense

  • Machinable Hardness and Application of #99 Alumina Ceramics
    Machinable Hardness and Application of #99 Alumina Ceramics
    2022-06-23

    Machinable Hardness and Application of #99 Alumina Ceramics * Machinable Hardness of #99 Alumina Ceramics 99 alumina ceramics is the most common industrial ceramic materials, and widely applied in modern society for its excellent properties. In this article, the machinable hardness and application of #99 alumina ceramics are briefly introduced. AL2O3 mainly has 3 kinds of crystalline phases, which are α,β and γ crystalline phase. Among them, αcrystal phase Al2O3 has the most stable state. When temperature reaches up to 1300℃, β and γ crystals almost convert to αphase crystal. In Al2O3 crystalline phase, most atomic bonds (formed by aluminum ion and oxygen ion) are covalent bonds, ionic bonds or mixed bonds of both, which results in high interatomic binding energy and strong directivity, therefore Al2O3 material manifests high brittleness, low plastic deformation, and high hardness. Its hardness is comparable with cemented carbide, and several times higher than steel. Alumina Creamic Generally, density of high purity AL2O3 ceramics can reach up to 3980kg/m3, and strength of extension is 260MPa, the elastic modulus is between 350 to 400GPa, and compressive strength is 2930(MPa). For hardness, high purity AL2O3 could reach to 99HRA. Although hardness of #99 refined AL2O3 ceramics is relatively lower than that of high purity AL2O3 ceramics, it could still reach to 70HRA at room temperature according to test result. * Application of #99 Alumina Ceramics Alumina oxide is the most proven engineering ceramics, with excellent electrical insulation performance, high hardness and wear-resistance, it is widely applied in machinery manufacturing, aerospace, precision instruments, petrochemical and other fields.

  • Thermal Analysis (TGA+DSC) sample pan for LINSEIS STA PT 1600
    Thermal Analysis (TGA+DSC) sample pan for LINSEIS STA PT 1600
    2019-11-18

    Thermal Analysis (TGA+DSC) sample pan for LINSEIS STA PT 1600 Ceramic crucibles Size D6.4*8mm for Linseis (Sample Pans) D6.4*8 mm Alumina crucibles sample pans for Linseis DSC and TGA measurements .Manufacturer for Linseis crucibles and sample pans. 95μl Alumina crucibles D7*5*0.6mm for Linseis (Sample Pans) 95μl Alumina crucibles sample pans for Linseis DSC and TGA measurements .Manufacturer for Linseis crucibles and sample pans. 300ul Linseis STA Special Shape Alumina Pans for Linseis (Sample Pans) 300ul  Linseis STA special shape alumina pan for Linseis STA DSC and TGA measurements .Manufacturer for Linseis crucibles and sample pans. 3ml Linseis STA Ceramic Crucibles for Linseis (Sample Pans) 3ml Linseis STA special shape alumina pan for Linseis STA DSC and TGA measurements .Manufacturer for Linseis crucibles and sample pans. Linseis Alumina Circle Piece D6*2mm for Linseis (Sample Pans) 95μl Alumina ceramic Circle Piece for Linseis DSC and TGA measurements .Manufacturer for Linseis crucibles and sample pans. First

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