Introduction to the types and characteristics of alumina industrial ceramic materials

Aluminum oxide industrial ceramic materials have good conductivity, high mechanical strength, and high temperature resistance. They have a high melting point and can be used as advanced refractory materials, such as crucibles, high-temperature furnace tubes, etc. Next, we will introduce the types and characteristics of aluminum oxide industrial ceramic materials.

Types of alumina industrial ceramic materials

Aluminum oxide ceramics are divided into two types: high-purity type and ordinary type.

1. A ceramic material with a high-purity Alumina Ceramic system and an Al2O3 content of over 99.9%, due to its high sintering temperature of 1650-1990 ℃ and transmission wavelength of 1-6 μ m.

Molten glass is generally made to replace platinum crucibles, and its transparency and resistance to alkali metal corrosion are used as sodium lamps. Molten glass can be used as integrated circuit substrates and high-frequency insulation materials in the electronic industry.

2. The ordinary alumina ceramic series is divided into varieties such as 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain, etc. according to the different Al2O3 content. Sometimes, those with Al2O3 content of 80% or 75% are also classified as ordinary alumina ceramic series.

Among them, 99 alumina industrial ceramic materials are used to make high-temperature crucibles, refractory furnace tubes, and special wear-resistant materials, such as ceramic bearings, ceramic seals, and water valve plates.

95 alumina ceramics are mainly used as corrosion-resistant and wear-resistant components, while 85 ceramics are often mixed with some talc, which improves their electrical properties and mechanical strength. They can be sealed with metals such as molybdenum, niobium, and tantalum, and some are used as components in electric vacuum devices.

Characteristics of alumina industrial ceramic materials

1. High hardness

According to the Shanghai Institute of Ceramics, Chinese Academy of Sciences, its Rockwell hardness is HRA80-90. Its hardness is second only to diamond and far exceeds the wear resistance of wear-resistant steel and stainless steel.

2. Excellent wear resistance

According to the Institute of Powder Metallurgy at Central South University, its wear resistance is 266 times that of manganese steel and 171.5 times that of high chromium cast iron. According to our customer tracking survey over the past decade, under the same working conditions, the equipment's service life can be extended by more than ten times.

3. Lightweight

Its density is 3.5g/cm3. It is only half of that of steel, which can greatly reduce equipment load.