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Yttria Stabilized Zirconia Technical Ceramics

What is YSZ?

YSZ is Yttria Stabilized Zirconia Polycrystal, also known as Y-TZP (Yttria Toughened Zirconia Polycrystal). It is the part of the Transformation Toughened Zirconia Series.

Zirconia, in its unstabilized form has monoclinic, square or cubic crystal phases. On partial stabilization by Yttria (Yttrium Oxide), the resultant phase is tetragonal endowing it with very high hardness & wear resistance along with high chemical inertness, making it the best material for wear resistant, corrosion resistant and temperature resistant applications.

Click here for detailed information on Transformation Toughened Zirconia

Typical Applications of YSZ Technical Ceramics:
• YSZ Grinding Media: For the high purity grinding and creation of dispersions. The key properties are its high wear resistance and chemical inertness that allows it to be used even in food and cosmetic industry.
• Ceramic Ball Valves: Structure Ceramic Ball Valves are an ideal substitute for Titanuim and Monel valves as they offers low-cost and longer life (2~4 times of Titanium Valves) coupled with extra resistance to corrosion and elevated temperature. It can be widely used in transportation systems of various acidic or alkaline solutions, high temperature steams and slurries and even in the lines of petroleum industry. Its excellent versatility makes it one of the best solutions to the valve problems.
• Structural Ceramics: Various structural ceramic components such as pistons, plungers, knives, wear components for the wire drawing industry such as capstans, precision measuring gauges and other customized products are made from YSZ Material.

Characteristics of YSZ Products:
• YSZ Products are very hard (> 9 on Mohs scale, diamond being 10), with a satin smooth surface finish
• YSZ Products are chemically inert, thereby having a very high corrosion resistance.  They are impervious to most acids & alkalis
• YSZ Products have a very high wear resistance, hence causing no contamination in the material being milled / ground / dispersed
• YSZ Products have a density >6 gm/cm3, which makes it the most dense of the ceramic products

Material Properties of YSZ Products:

Property	Specification
COMPOSITION	ZrO2 – 94.6%  Y2O3 – 5.4%
DENSITY	> 6.0 gm/cm3
HARDNESS ON VICKERS (HV )	1250
HARDNESS ON Mohs	>9
ELASTIC MODULUS	205 GPa
WATER ABSORPTION	NIL
POROSITY	NIL
FRACTURE TOUGHNESS	>9 Mps.m½

 

Important Note:

Please note that the above results are from test samples and should be used only for guidance. This chart is intended to illustrate typical properties of advanced ceramic materials available from M/S Bhise Ceramics Pvt. Ltd. The buyer should recognize that exact properties may vary according to product configuration and may sometimes be tailored to meet specific requirements. The information set forth herein is offered for comparison only, and is not to be construed as absolute engineering data or constituting a warranty or representation for which M/S Bhise Ceramics Pvt. Ltd assumes legal responsibility.

In Summary:

YSZ is the space age material which offers high temperature, high wear and high corrosion resistance giving the products high reliability, value for cost and enhanced life.