A supplier of advanced ceramic parts

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  • About Us
  • Advanced Ceramics
    1. What is advanced ceramics
      • Advanced ceramics

        Advanced ceramics definition:

        Advanced ceramics is also known as technical ceramics or fine ceramics;

        In Asia, it is usually called industrial ceramics.

        Advanced ceramics are inorganic & solid materials which is non-metal element combined by ionic bonds with covalent bonds.

        The powder composition is strictly controlled in the manufacture process, chosen suitable forming method, sintering system and precision machining process to make it materials of perfect physical characteristics.

        With better physical performance compared to other materials, advanced ceramic materials are widely used in many industries.
    2. Type of advanced ceramics
      • Alumina (Al2O3)

        Alumina ceramics and is the most widely used material. It offers superior mechanical strength, electrical insulation, high frequency retention, thermal conductivity, heat resistance and corrosion resistance.

        Alumina ceramic components are used in a wide range of applications such as electronics, pump components and automotive sensors.

        We supply a variety of alumina ceramics of alumina content from 80% to 99.9%
        Physical properties, shape, dimensions and tolerance as required.

        Typical Physical Properties:
        Good electrical insulation
        High mechanical strength
        High hardness
        Excellent thermal stability
        Good chemical stability
        Excellent wear resistance
        Excellent corrosion resistance
        Low dielectric constant
        Good heat resistance.

      • Zirconia (ZrO2)

        Zirconia ceramics is the strongest and toughest material among advanced ceramics.

        Zirconia (ZrO2) has a monoclinic crystal structure at room temperatures, but transforms to cubic and tetragonal structures at elevated temperatures. This transition can result in the development of stresses during cooling which negatively impact the strength of the material.

        Typical Physical Properties:
        1.High hardness, high toughness, high bending strength, zirconia ceramic density is 5.95-6.05g/cm3, zirconia ceramic toughness is 8MPa · m1/2 or more higher;

        2.High wear resistance, low friction coefficient, wear resistance is 15 times that of alumina ceramics, friction coefficient is only 1/2 of that of alumina ceramics, after grinding(polishing) processing, the surface finish is better, up to ▽9, mirror surface, extremely smooth, with a lower coefficient of friction;

        3.Good insulation, corrosion resistance, no static electricity, high temperature resistance, excellent thermal insulation, thermal expansion coefficient is close to that of steel;

        4. Zirconia ceramics have self-lubrication, can solve the pollution caused by the lubricating medium and inconvenience caused by feeding.

      • Steatite

        Steatite is a magnesium silicate material of high electrical resistance at high temperatures, good mechanical strength and a very low dielectric loss factor, which has been used for many decades as insulators or enclosures for electrical components.

        Steatite ceramics is made from a mineral talcum(3MgO.4SiO2.H2O), as the main raw material, adding suitable clay and BaTi03 and other ingredients through the process of mixture fine grinding, molding and high temperature sintering.

        Steatite ceramics is an excellent material for electrical engineering as it can be readily shape sintered into a wide variety of forms such as washers, bushings, resistor forms, spaces and beads.

        Typical Physical Properties:
        Relatively high mechanical strength
        High volume resistivity at elevated temperatures
        Excellent dielectric strength
        Low dissipation factor

      • Silicon Carbon (SiC)

        This artificial compound is synthesized from silica sand and carbon. 


        It provides the best combination of heat resistance, light weight and corrosion resistance, and maintains its strength at high temperatures (1,500oC).

      • Silicon Nitride (Si2N4)
        Among fine ceramics, this lightweight, corrosion resistant material offers the highest level of toughness and thermal shock resistance at high temperatures, making it ideal for use in engine components.
    3. Properties of advanced ceramics
      • Chemical Properties

        Fine ceramics possess high levels of chemical stability. As a result, fine ceramic materials are highly resistant to chemical corrosion.


        chemicals — including hydrochloric acid, sulfuric acid, nitric acid, sodium hydroxide and hydrofluoric acid. The results were analyzed, and materials that dissolved in relatively large quantities were determined to be more sensitive to chemicals.
      • Thermal Properties
        1. Heat Resistance

        Conventional ceramics, including bricks and tiles, are well known for their ability to withstand high temperatures. Alumina ceramics begins to melt or decompose at temperatures above 1,800oC, much higher than the melting point of metal materials.


        2. Thermal Expansion
        Low Thermal Expansion

        When materials are heated, their size and volume increase in small increments, in a phenomenon known as thermal expansion. The coefficient ratio of thermal expansion indicates how much a material expands per 1℃ rise in temperature. Different material has different thermal expansion.Fine ceramics have low coefficients of thermal expansion — less than half those of stainless steels.


        3. Thermal Conductivity
        The property of heat transmitted through a material is called thermal conductivity.
        Fine ceramics offer a wide range of thermal conductivity.
        Among fine ceramics, some materials possess high levels of conductivity and transfer heat well, while others possess low levels of conductivity and transfer less heat.
        Silicon carbide transfer heat particularly well while zirconia ceramics block heat effectively and the coefficient of thermal conductivity is low — about 1/10 that of stainless steel.
      • Physical properties
        1. Hardness
        The signature feature of fine ceramics is their extreme hardness; as a result, they have valuable use in high-performance applications.

        The hardness of alumina ceramics is nearly 3 times that of stainless steel. This extreme hardness is one of many unique properties that makes fine ceramics "super materials" for modern technology.


        2. Rigidity

        Fine ceramics possess high rigidity, which is measured by inspecting the elasticity of a specimen after applying a load. Materials that display less elastic deformation under load possess higher levels of rigidity.


        3. Fracture Toughness
        Fracture toughness measures a fissured material's resistance to fracturing .

        Though fine ceramics generally possess low fracture toughness, partially-stabilized zirconia, used for products such as scissors and knives, offers significant fracture-toughness improvements.


        4. Specific Gravity (Density)
        Fine ceramics have lower specific gravity (density) than high-strength metals. Within the same volume, many fine ceramic materials weigh only half of the metal.
      • Electrical properties
        1. Electrical Insulation

        Fine ceramics are insulating materials that do not conduct electricity.


        2. Dielectricity

        Fine ceramics have become an indispensable material for producing capacitors and electronic components that are widely used in products such as computers, televisions and mobile phones. Capacitors serve as "traffic controllers" within an electronic circuit by conducting electricity to certain parts, temporarily blocking electricity, or blocking only certain types of electrical signals.


        3. Conductivity

        Though fine ceramics are generally insulating materials that block electricity, semiconductor ceramics can be created to conduct electricity depending on their temperature and the level of voltage applied.


        4. Super-conductivity
    4. Advanced ceramics production
      • Raw material preparation

        Raw material milling & mixing, spraying & drying


        The raw materials used in making technical ceramics (also known as “advanced ceramics”) include inorganic solid powders with precisely controlled purity, particle size and distribution.


        These raw materials are formulated for specific properties and functionality, then mixed with a binding agent or binder.

      • Shaping
        Typical shaping method:

        Dry pressing

        Hot pressing

        Injection and casting

        HIP

        CIM

        CIP

      • Firing (sintering)
        Shaped green body is fired at extreme heat in temperature-controlled kilns.
        Firing removes the moisture and binders. With additional firing, powder particles are sintered together and the products shrink due to reduced porosity. This process results in products of extreme density and hardness.

      • Machining

        Machining

        Standard GB/T1804-m & ISO 2768-1/2

      • Inspection & Packing
        About ISO 19652:2018
  • Alumina
    • Alumina ceramics
    • Technical data of alumina
    • Alumina ceramic spacers
    • Precision ceramic parts
    • Alumina ceramic crusher
    • Axle sleeve
    • Alumina ceramic tube
    • Ceramic screw tube
    • Alumina ceramic spacer
    • Precision ceramic parts
    • Alumina ceramic tube
    • Metallized ceramics
    • Alumina ceramic pipe
    • Alumina ceramic ring
    • Alumina ceramic disc
    • Alumina ceramic nozzles
    • Alumina ceramic disc
    • Alumina ceramic substrates

    Item

    Test Condition

    Alumina 95%

    Alumina 99%

    Alumina 99.7%

    Major chemical composition

    Al2O3 95% Min.

    Al2O3 99% Min.

    Al2O3 99.7% Min.

    Density

    3.6 g/cm3 Min.

    3.89 g/cm3 Min.

    3.96 g/cm3 Min.

    Working Temp.

    1450℃ Max.

    1600℃ Max.

    1650 ℃ Max.

    Water absorption

    0%

    0%

    0%

    Hardness (ROHS)

    85 Min.

    89 Min.

    89 Min.

    Flexural strength

    20℃

    358 MPa (52 psi x 103)

    550 MPa

    550 MPa

    Compressive strength

    20℃

    2068 MPa (300 psi x 103)

    2600 MPa (377 psi x 103)

    2600 MPa (377 psi x 103)

    Fracture Toughness

    K(lc)

    4-5 MPa m 1/2

    5.6  MPa m 1/2

    6  MPa m 1/2

    Coefficient of thermal expansion

    25-1000℃

    7.6 x 10-6 /℃

    7.9  x 10-6 /℃

    8.2  x 10-6 /℃

    Coefficient of thermal conductivity

    20℃

    16 W/m °K

    30 W/m °K

    30.4 W/m °K

    Thermal shock resistance

    ΔTc

    250 ℃

    200 ℃

    200 ℃

    Dielectricity constant

    1MHz. 25℃

    9

    9.7

    9.7

    Dielectric strength

    8.3 ac-KVmm (210 acV/mil)

    8.7ac-KVmm (220 acV/mil)

    8.7ac-KVmm (220 acV/mil)

    Volume Resistivity

    100℃

    1013 ohm-cm Min.

    1014 ohm-cm Min.

    1014 ohm-cm Min.

    We make fine ceramics of alumina content 80%~99.7%



  • Zirconia
    • Zirconia ceramics
    • Technical data of zirconia
    • Zriconia ceramic ring
    • Zirconia ceramic sleeve
    • Zirconia ceramic ferrule
    • Zirconia ceramic sleeve
    • Zirconia ceramic tube
    • Zirconia ceramic rods
    • Zirconia ceramic screw
    • Zirconia ceramic sleeve
    • Zirconia ceramic rings
    • Zirconia ceramics spacer
    • Zirconia ceramic ring
    • Ceramic-metal component
    • Ceramic spacers
    • Ceramic seal & spacers
    • Ceramic rings
    • Ceramic bearing (G10)

    Item

    Test Condition

    Zirconia ceramics

    Major chemical composition

    ZrO2:95%, Y2O3:5%

    Density

    6 g/cm3

    Working temp.

    1300 ℃

    Water absorption

    0%

    Hardness (ROHS)

    83 Min.

    Compressive strength

    20℃

    25,000 Kgf/cm2

    Fracture Toughness

    6-8 Map.m3/2

    Coefficient of thermal expansion

    9.5 x 10-6/℃

    Thermal shock resistance

    ΔTc

    360 ℃

    Volume Resistivity

    20℃

    1012 Ω.cm 20℃ Min.


  • Steatite
    • Steatite ceramics
    • Technical data of steatite
    • Steatite ceramic parts
    • Steatite ceramic parts
    • Steatite ceramic parts
    • Steatite ceramic parts
    • Steatite ceramic parts
    • Steatite ceramic parts
    • Steatite ceramic parts
    • Steatite ceramic parts

    Item

    Test Condition

    Steatite ceramics

    Major chemical composition

     

    Steatite

    Density

     

    2.6 g/cm3 Min.

    Working temp.

     

    1000℃ Min.

    Water absorption

     

    0%

    Hardness (ROHS)

     

    75 Min.

    Compressive strength

    20 ℃

    800 MPa Min.

    Fracture Toughness

     

    120 MPa Min.

    Dielectricity constant

    1MHz. 20℃

    5.5 εT

    Dieletric strength

     

    18 KV/mm

    Volume Resistivity

    20 ℃

    1012 Ω.cm 20℃ Min.


  • Contact
Advanced Ceramics
What is advanced ceramics
Type of advanced ceramics
Properties of advanced ceramics
Advanced ceramics production
Products
Alumina ceramics
Technical data of alumina
Zirconia ceramics
Technical data of zirconia
Steatite ceramics
Technical data of steatite
Contact us
  • Qingdao Lithaiwa Technology
  • LAVIE business park,
    No.702 Shanhe Road,
    Chengyang District, Qingdao, China
  • +86 186 6392 9510
  • lithaiwa@lithaiwa.com

  • Blog:Advanced ceramics supplier
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