Zirconia-Coating ZR-A - angew. Mineralogie

Zirconia-Coating ZR-A
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for the coating of ceramics, fibre ceramics, graphite and metals

good chemical stability

for high temperature applications to 1900°C

contains stabilized zirconium oxide

Description

Zirconia-Coating ZR-A is a special coating based on CaO-stabilized zirconium oxide. Contrary to the frequently used zircon (zirconium silicate) zirconium oxide shows a substantially better stability and temperature stress. Zirconia-Coating ZR-A is preferably used as protection and interface for graphite and ceramic crucibles, refractory bricks and fibre ceramics as well as for coating kiln furniture, supports and trays.

Within the metallurgical field of application Zirconia-Coating ZR-A can be used for coating crucibles, troughs, dies and thermocouples in order to obtain very pure melts and clean casting surfaces.

Due to its small grain size Zirconia-Coating ZR-A can be applied in thin layers (max. 200µm) only. For thicker layers the product Zirconia-Coating ZR-O is available. As an inexpensive version Zirconia-Coating ZR-M is recommended, based on unstabilized zirconium oxide.

Zirconia-Coating ZR-A can be used both at air as well as in the vacuum and inert gas to 1900°C. On graphite an application to approximetaly 1500°C is possible.

Application

Resuspend Zirconia-Coating ZR-A before use. If necessary, dilute with distilled water.
Application to clean surfaces is possible by brushing or spraying.
Dry carefully. Do not contact wet coatings with metal melts. After drying further coatings can be applied.
Curing of the coating can take place at 1000°C
Best performance of Zirconia-Coating ZR-A is obtained by a thin coat (<200µm). With a thicker coating application the danger of cracking exists.
During the application a damage of the coating should be avoided, because damaged areas are no longer sufficiently protected.
Tools can be cleaned with water.

Storage-Container Size

Keep containers closed and protect against frost. A storage temperature of >5°C (>41°F) is recommended. Zirconia-Coating ZR-A is available in 1kg-containers..

Safety Advices

Zirconia-Coating ZR-A contains water and is free of solvents. According to data available to us Zirconia-Coating ZR-A is a non-hazardous preparation. An EC material safety data sheet is available.

Technical Data

`Colour`	`creme`
`Ceramic constituent`	`Zirconium oxide`
`Binder`	`Alumina`
`Composition`	`96% ZrO₂ (CaO)`
	`4% Al₂O₃`
`Solid content`	`58%`
`Density (g/cm³)`	`1.8`
`Application temperature (max.)`	`1900°C (3452°F) (at air, vacuum, inert gas)`
	`1500°C (2732°F) (on graphite)`

These recommendations are believed to be correct. However, no guarantee of their accuracy is given. Therefore, purchasers shall make their own tests to determine suitability for their use. These products are offered for industrial and related uses (e.g. research and development) only. However the user must take the necessary precautions appropriate for products containing chemicals. This description does not imply the absence of any patents, the responsibility whatsoever solely rests with the user.