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YSZ Structural 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

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

Material Properties of YSZ Grinding Media:

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.m

Comparison of Wear Rates of Various Media:

The below graphic is the summary of the results.
Click here for the details of the entire test

Featured Section:

Comparison of the Wear Rates of Magnesia Stabilized Media to Yttria Stabilized Media: We tested the popularly available Magnesia Stabilized Media to Uniceram's YSZ Media. Click here to see why YSZ proves Superior to Magnesia Stabilized Media

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.

Click Here to Download our Product Catalogue for YSZ Structural Ceramics    (PDF Format)