Fused Zirconia-Mullite Duramul ZR - Applications and Properties

DURAMUL ZR is a fused, high purity zirconia-mullite grain produced by the electric furnace fusion of Bayer process alumina and zircon sand. During melting, the zircon and alumina react to yield a mixture of mullite and zirconia.

Applications of DURAMUL ZR

DURAMUL ZR is used in specialty product applications where a high resistance to environmental corrosion and a low coefficient of thermal expansion are desirable properties. Applications include ceramic pressure casting tubes and refractory shapes requiring resistance to molten slag and molten glass.

Typical Chemical Analysis of DURAMUL ZR

Following table describes the typical chemical analysis of DURAMUL ZR.

TYPICAL CHEMICAL ANALYSIS
Chemical Percentage
Al2O3 (by difference) 45.80%
ZrO2 36.00%
SiO2 17.50%
Fe2O3 0.20%
Na2O 0.30%
TiO2 0.20%

Typical Physical Properties of DURAMUL ZR

Following table describes the typical physical properties of DURAMUL ZR.

TYPICAL PHYSICAL PROPERTIES
Physical Property Specification
Crystallography
This product is composed of large, needle-like mullite crystals, containing co-precipitated monoclinic zirconia. Average crystal width is 100 µm, with an average length of 10,000 µm. Traces of dendritic, monoclinic zirconia and about 5% glass is present in the interstices between the mullite crystals.
Color Cream Colored
Specific Gravity 3.58
Melting Point 1750º - 1800º C

Sizes Available

DURAMUL ZR is available in the following grit sizes from Washington Mills:

3/6, 4/8, 8/10, 10/36, 10/20, 20/40, 30/70, 6/F, 10/F, 18/F, 22/F, 40/F, 100/F, 200/F, 325/F, DCF

Other Sizes Available Upon Request.

This information has been sourced, reviewed and adapted from materials provided by Washington Mills.

For more information on this source, please visit Washington Mills.

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