Zirconia Crucible (ZrO2 Crucible)

Product Information

Dubbed ‘ceramic steel’, Zirconia (Zro2) ceramic offers a combination of high hardness, wear and corrosion resistance, while exhibiting one of the highest fracture toughness values among all ceramic materials. There are several grades of Zirconia available –, the most common of which are Yttria Partially Stabilized Zirconia (Y-PSZ) and Magnesia Partially Stabilized Zirconia (Mg-PSZ). Both of these materials offer excellent properties. However, the operating environment and design will dictate which grade may be suitable for specific applications. Its high thermal expansion and unique resistance to crack propagation make it an excellent material for joining with metals like steel.

Zirconia (ZrO2) crucibles are great refractory and insulating containers. They have a clean melt at temperatures above 1900°C and above and are specially manufactured for melting superalloys and precious metals. They also have excellent chemical inertness, superior thermal shock resistance to temperatures reaching up to 2200°C, and good corrosion resistance to acids and alkalis.

Synonyms

Zirconia, Dioxozirconium, zirconium, dioxo-, Zirconium dioxide, Zirconium White, Zirconium(IV) oxide, Zircosol, Rhuligel, Zirconic anhydride, Diketozirconium

Zirconia Crucible Specifications

Dimensions

Per your request or drawing

We can customized as required

Properties（Theoretical）

·         Magnesia Stabilized Zirconia (MSZ) – magnesia stabilized; for high-temperature applications; it is not vulnerable to phase transformations at elevated temperatures; heterogeneous microstructure to protect against grain boundary sliding; transformation toughened; high fracture toughness

·         Yttria Stabilized Zirconia (YTZP) – yttria stabilized; fine-grained microstructure predominantly tetragonal phase; extremely high strength and toughness; use temperatures below 500°C; transformation toughened to resist crack propagation; superior chemical resistance; excellent wear resistance

·         Ceria Stabilized Zirconia (CSZ) – ceria stabilized high temperature, as well as high or low pH environments; transformation toughened; maintains strength in steam and pressure conditions; ceria fills crystal structure vacancies to prevent low temperature degradation

·         Zirconia Toughened Alumina (ZTA) – zirconia toughened alumina; provides 20-30% greater strength than alumina at a lower cost than stabilized zirconias. Transformation toughened; Higher toughness, hardness and wear resistance than alumina

Advantages

- Use temperatures up to 1000°C

- Low thermal conductivity

- Chemical inertness

- Resistance to molten metals

- Wear resistance

- High fracture toughness

- High hardness

Zirconia Machining

 Zirconia can be machined in green, biscuit, or fully dense states. While in the green or biscuit form, it can be machined relatively easily into complex geometries. However, the sintering process that is required to fully densify the material causes the zirconia body to shrink approximately 20%. This shrinkage means that it is impossible to hold very tight tolerances when machining zirconia pre-sintering. In order to achieve very tight tolerances, the fully sintered material must be machined/ground with diamond tools. In this manufacturing process, a very precise diamond coated tool/wheel is used to abrade away the material until the desired form is created. Due to the inherent toughness and hardness of the material, this can be a time consuming and costly process.

Applications of Zirconia Crucible

two types of them are divided as follows:

Refractory grade zirconia crucible, Density: 4.5g/cc, has micropores inside, also named a semi-ceramic crucible. It exhibits corrosion resistance performance of zirconia, is stable in the oxidizing and reducing atmosphere, and it is very resistant to many solutions and slag. At the same time, it has the thermal shock resistance of refractory materials, which greatly improves the change of temperature gradient during use, and is widely used in the smelting of platinum and other rare precious metals. Three main size of this type: 250ml, 5.0mmOD x 8.0mm H, 6.8mmOD x 4.0mm H. The last one is used as a thermal analysis crucible; it solves the analysis for materials that will react with alumina crucible at a high temperature

Ceramic grade zirconia crucible, density: 6.0g/cc, fully densified, and no pores. High-purity ceramic zirconia crucible is white, it will show yellow or grey if the purity is lower. It has stable chemical properties, except for sulfuric acid and hydrogen sulfuric acid, it has good stability to other acids, alkalis and alkali melts, glass melts and molten metals, low thermal conductivity, good thermal stability, and high temperature creep. The thermal conductivity is low, and the coefficient of thermal expansion is close to that of metal materials. It is an important structural ceramic material.

Zirconium Oxide Crucibles deliver cleaner melts at temperatures up to 1900°C and beyond. They are engineered for the melting of superalloys and precious metals and deliver heat-up and cool-down schedules that keep your foundry productive. They are widely used in:

-Chemical calcining

-Metal casting

-Metal melting, especially in superalloy and precious metals industries

-Thermal analysis crucibles

Packing of Zirconia Crucible

Standard Packing:

Sealed bags in carton boxes. Special package is available on request.

As a ceramic material, ZrO2 is quite fragile in a lot of cases. The ZrO2 Crucible are usually held in plastic bags by vacuum, and protected with heavy foam.

ATTs’ ZrO2 Crucible is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.

Chemical Identifiers