Technical Ceramics: Zirconia Alumina vs. Alumina Oxide

In terms of physical dimension and pure aluminum oxide content, aluminum oxide ceramic is the most widely accessible technical ceramic. When a designer is contemplating ceramics as a substitute for current metal applications or if the environment inhibits metals owing to excessive temperature, electrical, chemical, or critical wear, aluminum oxide, often known as Alumina, should be the first ceramic to examine.

The cost of the material in its as-fired state is not excessive, but if precise tolerances are required, diamond grinding and polishing are needed, which can significantly increase the cost and make the individual component more expensive than a metal part.

The savings could result from a longer life cycle or less downtime while the system is being repaired or replaced. Naturally, due to the application environment or constraints, specific designs simply cannot operate at all if they rely on metals.

Technical Ceramics: Zirconia Alumina vs. Alumina Oxide

Image Credit: INSACO Inc.-Machining of Hard Materials

The designer must also take into account the fact that all ceramics tend to be more fragile than most metals. Zirconium oxide ceramic, generally known as Zirconia, is an excellent alternative to consider if Alumina turns out to be brittle or prone to chipping in use. Zirconia is also very durable and resistant to wear.

Zirconia has a high resistance to impact due to its distinct tetragonal crystal structure, which is present in most 3% blends with Yttria. Zirconia enables fabricators to create delicate features and sharp edges that withstand rigorous treatment when combined with its fine grain size. Zirconia comes in two common grades: YTZP (Yttria blend) and MgO-PSZ (Magnesium blend).

Both raw materials have received approval for various industrial and medical and in-body uses. INSACO has connections with the producers of both materials and can suggest prospective raw materials suppliers for the designer to specify.

The designers of ceramic components for medical, aerospace, semiconductor, instrumentation, and industrial applications value INSACO proficiency in precise fabrication with complete QC documentation and material traceability.

Zirconia Alumina vs Alumina Oxide - Breakdown & Comparison - With music

Video Credit: INSACO Inc.-Machining of Hard Materials

This information has been sourced, reviewed and adapted from materials provided by INSACO Inc. - Machining of Hard Materials.

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Comments

  1. Jack DeWitt Jack DeWitt United States says:

    Hello AZO Materials,
    I had a few questions about Alumina and Zirconia and I was hoping you would be able to answer them for me.
    At what temperature does Zirconia and Alumina begin to degrade?
    Would it be possible to put either of these in carbon steel alloys?
    What temperature do the materials need to be at in order to be finished?
    What is the hardness and strength of Zirconia and Alumina?
    Is Alumina or Zirconia more cost-effective?
    I hope you will able to answer these questions for me.
    Thanks, Jack

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