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Alumina 300Gpa φ47mm Ceramic Mechanical Seal

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Alumina 300Gpa φ47mm Ceramic Mechanical Seal

Brand Name : Jingci

Model Number : JCMF007

Certification : RoHS

Place of Origin : Suzhou China

MOQ : Negotiation

Price : Negotiable

Payment Terms : L/C, T/T

Supply Ability : 30000pcs per 45 days

Delivery Time : 5-8 workdays

Packaging Details : carton box 225mm*215mm*225mm

Name : Ceramic Mechanical Seal

Material : Alumina

Size : Φ47mm

Density : Alumina 3.7-3.9g/cm^3; zirconia ≈6g/cm^3; silicon carbon ≈3.14g/cm^3

Vickers Hardness : Alumina 1800-2000 HV; zirconia ≈1300 HV; silicon carbon ≈2500HV

Fracture Toughness : Alumina ≈5 (Mpa m1/2) ; zirconia 7 (Mpa m1/2)

Compressive Strength : Alumina >3200 (Mpa Psi*103); Zirconia ≈3900 (Mpa Psi*103);Silicon carbon 2200 (Mpa Psi*103)

Thermal Expending Coefficient : Alumina 7.8-8.2 (1*10^-6/℃);Silicon carbon ≈4.5 (1*10^-6/℃)

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Ceramic Seal Part Alumina Ceramic Mechanical Seal Ring Anti-abrasion


Part Name: ceramic pump seal/zirconia seal plate

Specifications: φ47mm*H1.5mm

Materials: Yttria-stabilized zirconia

Yttria-stabilized zirconia (YSZ) is a ceramic in which the cubic crystal structure of zirconium dioxide is made stable at room temperature by an addition of yttrium oxide. After shaping and sintering, Yttria-stabilized zirconia’s hardness reaches HV2500, and has good properties as wear resistance, anti-corrosion, high temperature resistance, as well as excellent finish surface.


Powerful interatomic bonds endows zirconia ceramics not only with high hardness and wear resistance, but also a resistance to corrosion. Usually it has less hardness and brittleness than that of alumina ceramic, but has more elasticity, which means it is not as brittle as alumina ceramic. If hardness is not so exacting, zirconia parts are a good choice to be applied.

Detailed Product Description
Ceramic 95%
Fundamental propertiesHigh hardness, good wear resistance under abrasion,low electrical conductivity,good value for money
Main component95% Al2O3
Gross density3.7g/cm^3
Flexural Strength400 Mpa (Psi*103)
Compressive Strength3100Mpa (Psix103)
Fracture Toughness5 Mpa m1/2
Young’s Modulus (dynamic)/Elasticity Modules300 Gpa
Vickers Hardness1500-2200 HV
Thermal Conductivity28 W/mK
Coefficient of Linear Expansion
7.5 10^–6 K–1
Maximum Operating Temperature1400 ℃
Thermal Expanding Coefficient7.5 (1x10^-6/℃)
Thermal Shock Resistance250℃ Tc
Disruptive StrengthKV/mm,DC ≥20
Acid Resistancemg/cm^2 ≤0.7
Alkali Resistancemg/cm^2 ≤0.2
Wear Resistanceg/cm^2 ≤0.1
Dielectric Strength9.0 εr(20℃ ,1MHz)
Dielectric Constant9.2 1MHz 25°
Tensile Strength51KN
Volume Resistivity>10^15 100°
Water Absorption0
Specific Heat Capacity0.78x10^3 J/(kg.K)

Advantages of zirconia parts:

·High wear, heat, pressure, and chemical attack resistance (gas and liquids)

·Extreme hardness

·Excellent electrical insulation

·Relatively lightweight


Because zirconia has good properties of elasticity module and high hardness, as well as the above good properties, the parts made from zirconia are often used as mechanical or pump seal plate or disc.

About Us

Suzhou Jingci Super Hard Materials Co., Ltd has specialized in precision ceramics for more than twenty years and has rich experiences in designing and developing technical ceramic solutions for a wide variety of applications. Jingci has the capability to provide customers with expertise to make sure the best design and materials are made for their specific application and needs

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Φ47mm Ceramic Mechanical Seal


300Gpa Ceramic Mechanical Seal


Φ47mm ceramic seal ring

China Alumina 300Gpa φ47mm Ceramic Mechanical Seal factory

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