Alumina Plate - Oxides - Advanced Ceramic

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Alumina Plate

Alumina plates, are ceramic components made from high-purity Alumina (Al₂O₃). Known for their excellent hardness, high-temperature resistance, and electrical insulation properties, these plates are widely used in various industrial applications, including electronics, thermal insulation, wear-resistant parts, and laboratory equipment. Alumina Plate is chemical stability and resistance to corrosion make them ideal for use in harsh environments, while their strength and durability ensure long service life even under demanding conditions.

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Alumina properties and material advantages

Alumina (Al₂O₃) is an inorganic non-metallic material with the following core characteristics:

High hardness:

Alumina ceramics with a purity of ≥99.7% can reach a Mohs hardness of 9-9.5, a Rockwell hardness of HRA80-90, and a compressive strength of 2000-2300 MPa, far exceeding ordinary steel (120-180 MPa).
High hardness is due to the dense crystal structure and strong chemical bonds (mainly ionic bonds, including some covalent bonds), making Alumina Plate widely used in wear-resistant parts (, aerospace thermal protection systems.

Corrosion resistance:

‌Chemical stability‌
The ionic bond between aluminum and oxygen in the alumina (Al₂O₃) crystal is strong, the chemical properties are stable, and it is not easy to react with corrosive media. For example:
Resistance to strong acids (sulfuric acid, hydrochloric acid, nitric acid, etc.)
Tolerance to strong alkalis (sodium hydroxide, potassium hydroxide, etc.)
Stability to organic solvents (alcohols, ketones, ethers)
‌Physical structure advantages‌
The material's dense crystal structure can effectively block the penetration of corrosive media and reduce the risk of internal damage. In addition, the higher the Al₂O₃ content, the more significant the corrosion resistance.

High temperature resistance:

High temperature stability: Alumina performs well at high temperatures and is not prone to cracking or deformation due to thermal stress. Its low thermal expansion coefficient is similar to that of metals, further enhancing its application potential in high temperature environments.
‌ Temperature range: The temperature range of alumina can usually reach more than 1500 degrees Celsius, and the specific value depends on its preparation process and material purity. Ｃ Ersol alumina sheet can withstand temperatures up to 1600°C

Excellent electrical insulation:

Alumina has good electrical insulation properties, which is mainly due to its high purity, low impurity content and stable crystal structure. The electrical insulation of alumina is mainly reflected in its high resistivity and low dielectric constant, which enables it to be used as a high-quality insulator in the electronics field and withstand higher voltages without electron leakage. Its dielectric constant is about 9.3-10.

Lightweight:

Density of 3.96g/cm³, 30% lighter than traditional metal materials, suitable for areas with weight reduction needs.

Description of Cersol Alumina Plate

Cersol Alumina Plate can be produced using a variety of raw materials and processes to meet your specific needs.
If you are looking for high density and high wear resistance, then we use gel molding to produce alumina plates with a density of up to 3.96.
If you are looking for complex shapes, then we use injection molding to customize special shapes for you.
Contact Cersol to provide you with solutions.

Properties	Unit	96 Alumina	99 Alumina	99.7 Alumina
Purity	Wt%	96	99	99.7
Density	g/cm³	3.7	3.85	3.96
Vickers Hardness	Gpa	13.9	15.2	16.3
Flexural Strength	Mpa	280	300	461
Thermal Conductivity	W(m · k)	24	25	25.2
Dielectric Constant	1MHz	9.4	9.6	9.65
Dielectric Loss	1MHz/10^-4	4	1	1

Core Application Areas

Semiconductor: Cersol's alumina plates have been widely used as wafer polishing pads and vacuum chuck substrates due to their high density and hardness.
New Energy: Ceramic linings for lithium battery diaphragm coating rollers, Cersol ALumina Plate has high temperature resistance and stable thermal conductivity (25W/(m·K)).
Military and Aerospace: High impact-resistant structural parts (Cesol's alumina ceramics have a bending strength of up to 461Mpa), radar window materials.
Industrial Machinery: Wear-resistant linings, pump and valve seals, with a service life increased by more than 3 times.
Electronics Industry: Cersol's Alumina Plate has the characteristics of high heat dissipation, low thermal resistance and long life. Due to its high strength and chemical stability, it is suitable for a variety of electronic manufacturing industries, such as LED substrates and high-frequency circuit substrates.

Alumina Plate

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