Products Description

Zinc oxide (ZnO) ceramics are semiconductor ceramic materials primarily composed of zinc oxide as the main crystalline phase, doped with additives such as bismuth oxide (Bi₂O₃) and cobalt oxide (CoO). Their key characteristic is a nonlinear resistance effect, making them highly suitable for electronic circuit protection applications. Compared to traditional ceramics, ZnO ceramics exhibit a 30% improvement in wear resistance and demonstrate excellent anti-contamination properties.

Zinc oxide (ZnO) ceramics find applications across multiple industries including electronic circuit protection, architectural ceramics, and environmental protection technologies. In terms of manufacturing processes, nano-scale ZnO technology can be employed to leverage quantum size effects, thereby enhancing sintering activity and electrical performance. Notably, ZnO ceramics exhibit low carbon emissions per unit product, qualifying them as an environmentally sustainable manufacturing solution.

Products Advantages

Outstanding nonlinear electrical performance: This is its core feature. Under normal voltage, it presents a high-resistance state (insulator); when the voltage exceeds its critical value (varistor voltage), the resistance drops sharply, allowing a large current to pass through, thereby effectively absorbing and discharging overvoltage energy.
Extremely fast response speed: The response time to voltage surges is in the nanosecond range, capable of quickly suppressing surges and protecting subsequent circuits.
Large current handling capacity: A single ceramic body can absorb and dissipate very high transient current energy, with reliable performance.
Good stability: It features excellent long-term operational stability and multiple impact endurance.
Inherent capacitance: Due to the similar microstructure, it inherently possesses a certain capacitance value, which needs to be taken into account when used in high-frequency circuits.
Weather resistance and chemical stability: Zinc oxide ceramic materials themselves are resistant to high temperatures, oxidation, and corrosion, and can adapt to various environments.

Zinc Oxide Ceramic Plate

Product name	Zinc Oxide Ceramic Plate
Material	Zinc Oxide Material
Color	White/Black Customized according to the client's requirements
size	Customized according to the client's requirements
Machining accuracy	±0.001mm
Packaging	Carton /Pallet/Wooden case (According to client requirement )
Delivery time	Standard Product-Within 3 days
Items Design	According to the client's drawing or samples
Features	Good quality, low price, Multiple factories, deliver to you based on the one closest to your location
Application	Industrial Ceramics
Certificate	ISO, CE

Main Applications

Due to its excellent pressure-sensitive properties, zinc oxide ceramic plates are mainly used as core components in surge protection and voltage stabilization fields:

Surge Protective Device (SPD):

Power system protection: Applied to low-voltage distribution systems and equipment power entry points, it guards against lightning-induced overvoltage and operational overvoltage. It is the core valve plate of surge arresters (surge protectors).
Communication and signal line protection: It is used to protect telephone lines, data lines, signal transmission lines, etc., to prevent overvoltage from damaging sensitive communication equipment.
Electronic device protection: Integrated into circuit boards of various household appliances and industrial control equipment, serving as primary or secondary protection components.

High-voltage and ultra-high-voltage power systems:

As valve plates of metal oxide arresters (MOA), they are used in substations, transmission lines, etc., replacing traditional silicon carbide arresters and are the main force in overvoltage protection of modern power systems.

Other special fields:

Voltage stabilizing components: By taking advantage of their nonlinear characteristics, they achieve voltage stabilization in some simple circuits.
Pressure-sensitive sensor: By taking advantage of its nonlinear voltage-current relationship, special sensing elements are fabricated.
Electrostatic discharge (ESD) protection: ESD protection for integrated circuits and precision equipment.

Ceramics performance parameter

Number	Performance	Unit	Zinc oxide
			Zinc oxide
			ZnO
1	Density	g/cm3	5.4
2	Flexural strength	MPa	80~150
3	Fracture toughness	MPa·m1/2	2
4	Dielectric constant	εr(20℃,1MHz)	15
5	Hardness	GPa	5
	Hardness	HV	6
6	Volume resistivity	Ω·cm(20℃)	10⁶~10⁹
7	Elastic modulus	GPa	150
8	Coefficient of thermal expansion	×10-6/k	4
9	Compressive strength	MPa	350
10	Abrasions	g/cm2	0.1
11	Thermal conductivity	W/m×k(20℃)	15~50
12	Poisson's ratio	/	0.3
13	Insulation strength	kv/mm	0.3
14	Temperature	℃	1400
15	Melting point		1975
16	Dielectric loss tangent value		10⁻³~10⁻⁴