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Zirconia Toughened Alumina & Fused Silica - Typical Characteristics

Zircon

  • Good Resistance to Thermal Shock
  • Good Resistance to Acidic Slag
  • Low Co-efficient of Thermal Expansion
  • Chemical Inertness
  • High Hardness

Fused Silica

  • Excellent Thermal Shock Resistance
  • Extremely Volume Stability at Elevated Temperature
  • Good Mechanical Properties at High Temperature
  • Near Zero Thermal Expansion Co-efficient
  • Low Dielectric Constant and Dielectric Loss

Zirconia Toughened Alumina [ZTA]

  • High Fracture Toughness
  • High Hardness
  • Excellent Wear Resistance
  • High Flexural Strength
  • Corrosion Resistance
  • High Temperature Stability
  • It is Bio Compatible
 
Property Details

 

Particulars

Units

ZTA

Zircon

Fused
Silica

Physical

Chemical Composition  

ZrO2.Al2O3

ZrO2.SiO2

SiO2

Density

gm / cc

4.02

3.63

2.2

Porosity

%

Nil

18%

Nil

Colour

 

White

Light Grey

White / Translucent

Mechanical

Flexural Strength

Kg / Cm2

4590

-

-

Compressive Strength

Kg / Cm2

29500

-

11500

Hardness (Vickers)

HV10

1650 – 1700

-

1100 – 1150

Thermal

Thermal Shock Resistance

Deg C

300

-

-

Thermal Conductivity

W/m Deg C

26

-

1.35

Co-efficient of Thermal
Expansion

x 10-6 / Deg C

8.3

-

0.5

Maximum Use Temperature

Deg C

1500

-

1100

Electrical

Dielectric Constant

MHz

10.6

-

3.8

Dielectric Strength

KV / mm

9

-

30

Electrical Resistivity, 25 Deg C

Ω-Cm

> 1014

-

> 1010

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