Zirconia (ZTA) Substrates

 Innovacera’s Zirconia Toughened Alumina (ZTA) Substrates combine the superior strength of zirconia with the stability of alumina, offering excellent mechanical performance, high reflectivity, and outstanding resistance to thermal shock. With a dense white appearance and exceptional surface finish, these substrates ensure reliable operation in medium-power electronic and optical applications. Their robust toughness and precise machining capability make them an ideal choice for medium-power supply modules, LED lighting systems, and precision instruments.

Features

• High strength
• High reflectivity
• High thermal shock resistance
• Excellent processing performance

Application

• Medium power supply module
• Medium power LED
• Instruments

Material Properties Table

Project		Test conditions	Unit	Al 2 O 3 /ZrO 2
				ZTA
Material		–	–	Al 2 O 3 /ZrO 2
Appearance		–	–	White dense
Surface roughness		Ra	μm	0.2~0.5
Density		–	g/cm 3	≥3.85
Physical properties	Bending strength	3 -point bending resistance	MPa	≥550
	Vickers hardness	Load 4.9	GPa	≥14
	Water absorption	–	%	0
Thermal performance	Thermal conductivity	25℃	W/(m·k)	≥23
	Linear thermal expansion coefficient	25-500℃	1×10 -6 mm/℃	6.6~7.5
	Thermal shock resistance	800℃	Time	≥10
	Specific heat	–	J/(kg·K)	720
Electrical properties	Dielectric constant	1MHz/25℃	–	10~11
	Dielectric loss	1MHz/25℃	x10 -4	≤3
	Volume resistivity	25℃	Ω·cm	> 10 14
	Breakdown voltage	–	KV/mm	> 15
Light performance	Reflectivity	Reflectivity meter	–	≥95%
	Whiteness	Whiteness meter	–	–

Specifications and Dimensions

Material	Unit	Al 2 O 3	ZTA	AlN	Si 3 N 4
Effective dimensions ( A , B )	mm	50.8-190	50.8-190	50.8-190	138*190
Thickness ( T )	mm	0.25-1.5	0.25-1.5	0.25-1.0	0.25 , 0.32
Thickness tolerance	mm	±5% ( Min±0.03mm )	±5% ( Min±0.03mm )	±5% ( Min±0.03mm )	±5% ( Min ±0.03mm )
Warpage ( C )	mm	≤0.3%	≤0.3%	≤0.3%	≤0.3%
surface roughness	μm	0.2-0.6	0.2-0.5	0.2-0.75	0.2-0.75
Size, thickness and surface roughness can be customized

 

Processing

• Laser processing

• Grinding and polishing sheet roughness table

Project		Qualified		Special Grade
Internal dimension tolerance		±0.05mm		±0.03mm
External dimension tolerance		±0.15mm		±0.1mm
Hole tolerance (φ0.07-0.15mm)		±0.05mm		±0.02mm
Hole tolerance (φ ＞ 0.15mm)		±0.1mm		±0.02mm
Project	Surface roughness (μm )
	Qualified		Special Grade
Grinding	0.3-0.6		0.3-0.5
Fine grinding	0.1-0.4		0.1-0.3
Polishing	≤0.1		≤0.05