Porous zirconia crucible

Porous zirconia crucible

Partly (MgO Magnesia) stabilised ZrO2Zirconium Oxide obtained by isostatic pressing, ideal for use up to 1800˚C.

Advantages

  • Can be used up to 1800°C
  • Very good resistance to thermal shock
  • Erosion resistant
  • Very low thermal expansion
  • Resistant to wetness from molten metals

Applications

  • Crucibles for induction melting
  • Crucibles for use in oxidising or vacuum atmospheres
  • Crucibles for precious metals or superalloys

Composition

Oxide

Percentage

ZrO2

95.3

MgO

2.2

SiO2

1.2

Al2O3

0.7

CaO

0.2

Fe2O3

0.2

TiO2

0.2

Physical proprieties

Density

g/cm3

4.6

Open porosity

%

18

Breakage module

MPa

24.1

Max. temperature

°C

1800

Thermal conductivity

W/mK

1.4 (at 800°C)

Thermal dilatation

10-6/K

 

at 600°C

 

6.6

at 1000°C

 

6.2

at 1300°C

 

2.3

Thermal dilatation curve

  • Duration of test: 18 hrs
  • Thermal cycle (in ˚C): 21 – 1550 – 67
  • Maximum dilatation: 9.22.10-3 mm

Specific resistivity curve

Crucibles (857.34k)

Technical data sheet crucibles.