High Density 99 Alumina Ceramic Sheet Durable Ceramics Alumina
For specific type, these alumina ceramics feature a variety of
|Good mechanical strength|
Good heat conductivity and fire resistance
Good corrosion and wear resistance
Very good electric insulation
The alumina substrates also possess several unique features
Alumina ceramic is kind of structural ceramics, with insulation
resistance, voltage resistance, high strength, good thermal
conductivity, dielectric loss, stable electrical performance
characteristics. Used in electronic ceramic substrates, ceramic
electrical insulation, vacuum devices, devices porcelain, spark
plugs and other products. We can make the part by hot injection
pressing, dry pressing, isostatic pressing and extrusion productive
Flexural Strength (20°C)
Compressive Strength (20°C)
Thermal Conductivity (20°C)
Thermal Shock Resistance (20°C)
Maximum Use Temperature
Volume Resistivity (25°C)
Alumina Ceramic Bushings / Sleeves
At the present time the special position in area of equipment for
dwelling houses and production facilities is occupied by electric
heating devices which key elements are, surely, tubular electric
heaters (TEHs). Ceramic bushings, being mounted at the ends of a
tubular heater, provide its electrical insulation and
air-tightness. Thus, we manufacture the products which can be found
almost anywhere – in electric boilers, autoclaves, washing
mashines, water heaters, electric hot plates, etc. Such a broad
scope of usage results in a wide diversity of ceramic bushings’
forms and sizes, and just some of them are shown here at the
3. Properties of the material alumina
alumina ( Al2O3) is an extremely refractory material. It possesses
excellent chemical inertness and corrosion resistance at
temperatures well above the melting point of alumina. Innovacera
Zirconia is fully stabilized in the cubic crystal structure to
avoid cracking and mechanical weakening during thermal cycling. In
addition to its high temperature capability, Zirconia offers low
thermal conductivity and is electrically conductive above 800ºC.
Also has the unique ability to allow oxygen ions to move freely
through the crystal structure above 600ºC.
|Physical Characteristics||Heat resistance||0C||2200|
|Mechanical Characteristics||Hardness vickers||Gpa||89|
|Thermal Characteristics||Linear expansion coefficient||(20-5000C) 10-6/0C||10|
|Electrical Characteristics||Dielectric constant (1MHZ)||-||N.A.|
|Dielectric loss angle||*10-4||N.A.|
Characteristic: Resistance to strong acid, strong alkali, salt and
gas of deleterious, long life, high hardness, resistance to wear,
especially resistance to hydrofluoric acid.
Ceramic parts are more resistant to heat meaning more reliable,
better performing, longer lasting, and they are electric insulation
can be used in many fields.
Zirconia sleeves are widely used in electrical industry, ceramic
industry, oil industry, food industry, medical industry, chemical
industry etc. to replace metal sleeves.
If you are interested in this product or just want to know more
about ceramic products, never hesitate to contact us.
We are looking forward to developing business relationships with
Zirconia ceramic(also can be called zro2,zirconium oxide ceramic)
has high toughness,high fracture resistant,good chemical
resistance,high bending strength,high wear resistance,the
coefficient of thermal expansion is close to steel,it is widely
used in structure ceramicareas.
Zirconia (zro2 ) has a wide application due to its versatility and
low material cost. zirconia possesses a high melting point, strong
hardness, and good chemical stability, making it a good material to
withstand high temperature and chemical corrosion. zirconia Plates
and Disks are available in different dimensions and thicknesses.
Call for custom shapes and sizes.
zirconia ceramic sleeve bushing Specifications
zirconia ceramic plate/tile
zirconia plate purity alumina 99.7%
Very small and very large size
High temperature,good abrasaive
zirconia Ceramic sleeve bushing Specifications
2. Very small and very large size can be made.
3. High temperature, good abrasive.
Refractory alumina ceramic substrate/ceramic plate is our main
product.Misson can supply high quality alumina plates with
Very small and very large sized plates can be made.
Fine grinding can made tight tolerance.
High temperature and abrasive resistance is good
Product features :
Applicable to make ceramic wrist watch, watch ctrap, bracelet, ring
and necklace etc. With the property of abrasion resistance,
invariant color, elegance and shining, ceramics are the ideal
decorative material for watch and jewelry industry. All the
ceramics can be customized.
1. High hardness.
2. High heat resistance : Alumina ceramic has excellent thermal
stability,which means that it is
widely used in areas where resistance to high temperatures is
3. Good wear resistance : Alumina ceramic is the material of choice
for alumina wear parts.
4. High electrical resistivity : Alumina is an electrically
5. High corrosion resistance : It is insoluble in water and only
slightly soluble in strong acid and
alkaline solutions. Good chemical stability of alumina leads to
high corrosion resistance.
1. High heat resistance : Zirconia ceramic has excellent thermal
stability,which means that it is widely used in areas where
resistance to high temperatures is essential.
2. Good wear resistance : Zirconia ceramic is the material of
choice for wear parts.
3. High corrosion resistance : It is insoluble in water and only
slightly soluble in strong acid and alkaline solutions. Good
chemical stability of alumina leads to high corrosion resistance.
Alumina ceramic is the most mature of the engineering ceramics,
offering excellent electrical insulation properties together with
high hardness and good wear resistance,but relatively low strength
and fracture toughness.Alumina ceramics are generally white but may
also be pink or ivory.The color is derived from either the
sintering additives or impurities in the raw materials.
Properties of Alumina and Zirconia Ceramic :
|Properties||Units||95 Alumina||99 Alumina||ZrO2|
|Density||g / cm³||3.65||3.92||5.95-6.0g/cm³|
|Coefficient of thermal expansion||10-6/K||7.9||8.5||10.5|
|Modulus of Elasticity Young's Mod||GPa||280||340||210|
|HV Hardness HV||MPa||1400||1650||1300-1365|
|Flexural Strength @ room temperature||MPa||280||310||950|
|Flexural Strength @700°C||MPa||220||230||210|
|Compressive Strength @ room temperature||MPa||2000||2200||2000|
|Fracture Toughness||MPa *m 1/2||3.8||4.2||10|
|Heat conductivity @ room temperature||W/ m*k||18-25||26-30||2-2.2|
|Electrical Resistivity @ room temperature||Ω*mm2 /m||>1015||>1016||>1015|
|Max use temperature||°C||1500||1750||1050|
|Resistance to acid alkaline||/||high||high||high|
|Thermol Shock Resistance||△ T ( °C )||220||180-200||280-350|
|Tensile Strength @ 25 °C||MPa||200||248||252|
We ( Dongguan Mingrui Ceramic Technology Co., Ltd ) are a
professional manufacturer specialized
in R&D, manufacturing and selling customized all kinds of high
precision zirconia and alumina ceramic parts . Our main products
include ceramic rod , ceramic tube, ceramic plunger, ceramic valve,
ceramic plate, ceramic shaft and bearing , ceramic nozzle etc ,
which are mainly used in industrial fields of Machinery,
Petrochemical oil and gas, Valves, Automotive, Food Processing,
Fluid Handling, Process Control, Thermal Processing, Aerospace,
Defense, Eletronic and Electrical, Textile, Mechanical,
Engineering, Mineral Processing, etc.
We have a full service include mold design and development ,
ceramic forming , precision machining
and precision detection technology. We have achieved great
successes in particular requirements
which is based on cooperating with Tsinghua University and getting
rich experience by our professional technical engineer teams . Our
factory have an unique technical called mirror polishing which
our products more smooth , bright than other competitors.
more photos of ceramic sleeve bushing :
1. What kind of industry ceramics do you have ?
We specialized in 95% 97% 99% alumina ceramic and zirconia ceramic
2. What kind of molding method do can you supply ?
Dry Pressing , isostatic pressing , grouting , hot-chamber die
casting , tape casting , injection molding, etc, injection molding
and isostatic molding is the most commonly used.
3.What stabilizer do you use when processing ?
Yttria stabilizer is the most commonly used in our industrial
4.Can you produce free samples for me ?
Yes usually , we can produce free samples for you but it is up to
the product complexity .
5.What terms can you accept for payment ?
T/T, L/C , Western union , Money Gram and Paypal is welcome , but
paypal and western union only for small -sum payment.