Jul 22
96 Alumina (Al2O3) Substrates
Innovacera’s 96 Alumina (Al₂O₃) Substrates combine high density, superior thermal conductivity, and excellent dielectric strength, making th
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96 Alumina (Al2O3) Substrates
Innovacera’s 96 Alumina (Al₂O₃) Substrates combine high density, superior thermal conductivity, and excellent dielectric strength, making th
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What's The Differences Between Alumina Ceramic And Zirconia Ceramic
Alumina is a very common technical ceramic material. Zirconia is also widely used in machinery industries. As an advanced ceramics manufacturer, we'd like to introduce the differences between alumina ceramic and zirconia ceramic.
In terms of performance: 1.The density of zirconia ceramics is twice that of alumina ceramics, the bulk density of zirconia is 6.05g/cm3, while that of alumina is only 3.7g/cm3. So zirconia has better compressive properties in comparison. 2.The toughness of zirconia ceramics is 4 times that of alumina ceramics. The toughness of the zirconia ceramic is excellent, which overcomes the inherent brittleness of the ceramic itself, has higher wear resistance, and greatly extends the service life of the product. 3.Zirconia parts with higher surface finish. After grinding and processing of two materials, zirconia has a higher surface finish, and the roughness can reach about Ra0.02. The surface is mirror-like, very smooth, and has a smaller coefficient of friction. But alumina roughness is about Ra0.2~Ra0.4. 4.Zirconia ceramics have excellent thermal insulation, and its thermal conductivity is less than one-tenth of the thermal conductivity of other ceramics. In terms of price: The price of alumina is lower than that of zirconia. One of the reasons is the cost of the raw material, another reason is the high processing cost of zirconia ceramics. In terms of applications: 1.Alumina ceramic could withstand higher temperature, application in industry furnace. 2.As the wear resistance for zirconia is much better, it is frequently used as mortar and pestles, grinding jars and grinding media, bearing balls and ceramic parts in valves and pumps. 3.Zirconia has better corrosion resistance. Zirconia could survive longer in highly corrosive environment and is considered better material in chemistry laboratories. So Zirconia ceramics are suitable for applications in high-load, high-strength, and chemically corrosive environments, while alumina ceramics are suitable for applications with low loads, high temperatures, and heat dissipation. Read the full article
What are the defects on the surface of alumina ceramics?
Alumina ceramics is a kind of ceramic material with Al2O3 as the main raw material. It has many advantages, such as high mechanical strength, high hardness, and low dielectric loss at high frequencies, so it is widely used in the fields of electronics, electrical appliances, machinery, textiles, and aerospace. But do you know what is its defect?  Alumina ceramics have a series of production processes. During the process, materials will come into contact with machinery, equipment, tools, utensils, and the environment. Therefore, there are many factors that cause pollution and quality problems in ceramic parts. In general, the common quality problems related to color after sintering of alumina ceramics are: (1) There are spots on the surface, such as black spots, brown spots, and red spots; (2) There are plaques on the surface, such as dark plaques, black plaques, bright plaques, etc.; (3) Ceramic parts have chromatic aberration, such as overall yellowing or graying;  Innovacera has extensive experience in the manufacture of alumina ceramics and we have a lot of solutions to avoid the above issue. What are the defects on the surface of alumina ceramics？
What are the defects on the surface of alumina ceramics？
What are the defects on the surface of alumina ceramics？ Read the full article