Zirconia Toughened Alumina (ZTA)

Zirconia Toughened Alumina(ZTA)


By adding zirconia, the alumina substrate becomes a material with unique engineering properties, which can be used in wide range of applications of wear resistance, corrosion resistance, high temperature stability and excellent mechanical strength, in biomedical, automotive, aviation, etc. 

Passive components require thinner thickness, which makes the strength and toughness of ceramic substrates more important. Sintronic ZTA substrates can be as thin as 0.08mm, allowing customers to design thinner and lighter electronic components.

The substrates used in high power products require higher strength and withstand greater thermal shock.
ZTA substrates enable customers to design more suitable for high-voltage and high-current energy conversion.
More and more IGBT power modules are switching from alumina to ZTA substrates. These modules are mostly used in electric vehicles, wind energy, solar energy, 5G industrial industries.

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Material Characteristics:

Bulk Density (g/cm3)≧ 4.1
Water absorption (%)0
Roughness( Ra) µm≦ 0.2
3-point Flexural strength (MPa)≧650
Thermal conductivity(20℃) W/m K≧25
Coefficient of thermal expansion
(20~300℃) (10-6/K)
Volume Resistance(25℃)>1014
Dielectric Constant(1MHz)12.2
Dielectric strength (KV/mm)-DC> 15

A patent for manufacturing method of ceramic substrate

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