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99% alumina

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Ningbo Taike Advanced Ceramics Co., Ltd.
Shop owner:Manager Deng
Address:No. 285, Jiaochangshan Road, Zonghan Street, Cixi City, Ningbo, Zhejiang Province
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  • Product Introduction

*Well-known oxide ceramic materials

In its various purities, alumina or aluminum oxide (Al2O3) is used more often than any other advanced ceramic material. Tech offers a wide range of material types with different property profiles that can be adjusted through targeted matrix design.

Key Performance

  • Hard, wear-resistant

  • Excellent dielectric properties from DC to GHz frequencies

  • Resistance to strong acid and strong alkali attacks at high temperatures

  • Good thermal conductivity

  • Excellent size and shape capabilities

  • High strength and stiffness

  • It can provide a purity of 94%, with an easy-to-aluminum-plating composition range, and 99.5% for the most demanding high-temperature applications.

Typical Uses

  • Gas laser tube

  • Wear a pad

  • Sealing ring

  • High-temperature electrical insulator

  • High-voltage insulator

  • Lining tube

  • Thread and guide plate

  • Electronic substrate

  • Bulletproof armor

  • Wear-resistant pipe and elbow lining

  • Temperature sensor

  • Laboratory instrument tubes and sample racks

  • Instrument Component Thermal Performance Testing Machine Grinding Media

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Alumina ceramics (aluminum oxide) possess high electrical insulation, corrosion resistance to acids and alkalis, and wear resistance. This exquisite ceramic is used in various fields, including mechanical components and electronic device parts. Taike manufactures various grades of alumina ceramics (90–99.9% or high-purity Al₂O₃) and translucent alumina ceramics.

Physical Property Comparison Matrix

Units

TopTek
94

TopTek
95

TopTek
96

TopTek
99

TopTek
100

Nom. Comp.


94%
Al2O3

95%
Al2O3

96%
Al2O3

99.5%
Al2O3

99.9%
Al2O3

Density

g/cm3

3.69

3.67

3.67

3.89

3.92


Mechanical Property Comparison Matrix

Units

TopTek
94

TopTek
95

TopTek
96

TopTek
99

TopTek
100

Flexural Str @ 20°C

MPa 330 330 360 330 350

Flexural Str @ 800°C

MPa 240 240 250 250 250

Comp Str

MPa 2100 2100 2100 2100 2500

Mod of Elasticity

GPa 275 275 275 330 350

Hardness

R45N 78 80 81 83 84

Hardness

Hv0.3 1500 1550 1590 1600 1700

Fracture Toughness (K1C)

MPa½ 3.5 3.6 3.5 4 4.5
Thermal Performance Comparison Matrix

Units

TopTek
94

TopTek
95

TopTek
96

TopTek
99

TopTek
100

Max. Use Temp.

°C 1500 1450 1700 1800 1725

Therm Exp Co-Eff.

X10-6 /°C 8.1 8.3 7.8 8.4 8.5

Therm. Cond

W/m.K 19 22.5 25 29 28

Thermal Shock Resist

°C 200 200 200 200 220
Electrical Performance Comparison Matrix

Units TopTek 94 TopTek 95 TopTek96
TopTek 99 TopTek 100

Resistivity 25°C

Ohm.cm >1014 >1015 >1014 >1014 >1014

Resistivity 300°C

Ohm.cm 9x1011 5x109 3.1x1011 1.6x1013

Resistivity 500°C

Ohm.cm 2.5x109 4x107 4x109 2.1x1010 1012

Resistivity 700°C

Ohm.cm 5x109 2.5x106 1.0x108 4.4x108

Resistivity 1000°C

Ohm.cm 5x105
1x106
106


**Application Comparison**
97% alumina
97.0% Al2O3 content high-quality alumina ceramic. This material is an excellent electrical insulator and can be metallized to facilitate high-temperature brazing of components.

97.5% alumina
Microcrystalline alumina ceramic or 97.5%, Al2O3 content. A high-quality material widely used for thick-film metallized electrical and mechanical components, as well as for dynamic applications where resistance to wear and chemical corrosion is essential.

99.5% alumina
It is an alumina ceramic with 99.5% Al2O3 content. This material is widely used in applications requiring excellent electrical resistance combined with chemical corrosion resistance. This ceramic can also be metallized.

99.8% alumina
High-purity alumina ceramics have a minimum purity of 99.8% Al2O3 content. Developed for semiconductor processing applications, they exhibit high resistance to semiconductor etching chemicals and possess excellent mechanical wear resistance.

99% alumina material
99% pure alumina, 99% alumina, and high-purity alumina are used to produce wear-resistant components, as they have been specifically developed for chemical and physical wear environments. These components include shafts, plungers, bearings, and seals, which function in applications involving chemically and physically aggressive media. They are utilized in the manufacturing of products such as circulation pumps, reciprocating pumps, and resonator supports.
Tike utilizes ceramic injection molding and precision grinding to produce components with stringent surface finish and flatness requirements, as well as complex compositions. Our manufacturing process supports production volumes ranging from low to high.
Such components are commonly used in water management, medical, automotive, telecommunications, and home appliance applications. If you are interested, using 99% high-purity alumina in your products provides extremely high hardness and wear resistance, showcasing the versatility of alumina ceramics.

Material Properties

Thermal Properties


Composition

Properties of Alumina 99%
















Compressive Strength



























Bulk Density Open Porosity 20°C 1000°C 20°C

Alumina Al2O3 99.0%

Alumina has a high melting point, high hardness and high mechanical strength, although mechanical strength is reduced at temperatures above 1000°C. Due to the relatively large coefficient of thermal expansion, thermal shock resistance is reduced.
3.83 g/cm3 0% 345 Mpa 145 Mpa 2550 Mpa

Silica SiO2 0.7%

Alumina is an electrically insulating material, with a high electrical resistivity, increasing with purity.










239 lbs/ft3 0% 50 ksi 30 ksi 370 ksi


Magnesia MgO 0.07%

Good chemical stability of alumina, leads to a high corrosion resistance. It is insoluble in water and only slightly soluble in strong acid and alkaline solution.






Flexural Strength



Iron Oxide Fe2O3 0.07%




















Conductivity Expansion Coefficient


Sodium Oxide Na2O 0.05%




















20°C 800°C 20-1000°C



Calcia CaO 0.03%





















29 W/m°K 7.2 W/m°K 8.4 x 10-6/C°


























201 BTU.in/ft2.hr°F 50 BTU.in/ft2.hr°F 4.7 x 10-6/F°
























Max Use Temperature (no load)1700°C 3092°F

























AP35 99% ALUMINA




























99% Alumina Applications
Alumina is a *mature engineering ceramic with high hardness and good wear resistance, but relatively low strength and fracture toughness, while providing excellent electrical insulation properties.

Different Types of Aluminum Oxide
Alumina is usually white, but sometimes it is pink (88% alumina) or brown (96% alumina). The color comes from either sintering additives or impurities in the raw materials.



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