Technical Ceramics

Mullite (Pythagoras)

We offer a range of mullite materials marketed under the Pythagoras™ name for our Haldenwanger® range of products.

Our Pythagoras™ material is the most economical mullite material for kiln components. This material has good thermal shock resistance and good mechanical strength for kilns working under normal conditions up to 1400°C. It features very good chemical resistance against gases free of fluorine and is very economical as it is used as impervious protection sheaths and insulators for temperature measurement.

Pythagoras™ Standard

The most economical, mullite material for kiln components.
  • Type 610 according to DIN EN 60672
  • Application temperatures up to 1400°C
  • Very good chemical resistance against gases free of fluorine
  • For kiln working under normal conditions Pythagoras™ has a good thermal shock resistance and good mechanical strength
  • Pythagoras™ is a very economical material being used as impervious protection sheaths and insulators for temperature measurement

 

Material Properties

Unit

Pythagoras™

General

Type according to EN 60672

C 610

Typical composition

%

Al2O3 56-58
SiO2 38-40

Bulk density

g/cm3

2.6

Water absorption capacity

%

0

Porosity

Vol %

Vacuum tight

Mechanical

Medium flexural strength

MPa @20°C

120

Young's modulus

GPa @20°C

100

Thermal

Linear coefficient of thermal expansion

1/106 K

6

Thermal conductivity

W/mK @ 200°C

2

Tmax (depends on are of application)

°C

1400

Thermal shock resistance

good

Electric

Dielectric strength (according to IEC 672-2)

kV/mm

17

Resistivity at DC voltage

Ω cm @20°C

1013