Other concepts
Alumina ceramics are ceramic materials based on aluminum oxide (Al2O3).
Transparent ceramics are ceramics that use high-purity ultra-fine ceramic raw materials and remove pores through technological methods to achieve transparent properties.
Ingredients and classification differences
Alumina ceramics are divided into two types: high-purity and general types.
High-purity alumina ceramics are ceramic materials with Al2O3 content of more than 99.9%, and their sintering temperature is high at 1650~1990°C, and their transmission wavelength is 1~6μm, so they are generally made of molten glass to replace them. Platinum crucibles; Light transmittance is used as sodium lamp tubes due to their corrosion resistance and resistance to alkali metal corrosion, and can be used as integrated circuit substrates and high-frequency insulating materials in the electronics industry.
General alumina ceramics are classified into 99 types, 95 types, 90 types, 85 types and other types according to their Al2O3 content. Sometimes ceramics with Al2O3 content of 80% or 75% are also classified as general alumina ceramic series. Among them, 99 alumina ceramics are used to make high-temperature crucibles, refractory tubes and special wear-resistant materials such as ceramic bearings, ceramic seals and water valves. 95 alumina ceramics are mainly used for corrosion resistance and wear resistance. Parts; 85 ceramics contain some talc, so their electrical properties and mechanical strength are improved, and they can be sealed with molybdenum, niobium, tantalum and other metals, and some are used as electronic vacuum device parts. Transparent ceramics can be divided into alumina transparent ceramics, yttrium oxide transparent ceramics, magnesium oxide transparent ceramics, yttrium aluminum garnet transparent ceramics, aluminum magnesium acid transparent ceramics, transparent ferroelectric ceramics, aluminum nitride transparent ceramics, and aluminum oxynitride transparent ceramics according to their composition. Ceramic, magnesia-aluminum spinel transparent ceramic, etc.
Various performances
Alumina ceramic characteristics:
1. High hardness
The Rockwell hardness measured by the Shanghai Ceramic Research Institute of the Chinese Academy of Sciences is HRA80-90, which is the second hardness after diamond and far exceeds the wear resistance of wear-resistant steel and stainless steel.
2. Excellent wear resistance
According to the measurement by the Powder Metallurgy Research Institute of 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 customer tracking surveys conducted over more than 10 years, the service life of equipment can be extended by at least 10 times under the same working conditions.
3. Light weight
The density is only 3.5g/cm3, which is only half that of steel, which can greatly reduce the load on equipment. Transparent Ceramic Characteristics:
Transparent ceramics, a branch of advanced ceramics, not only inherits the high temperature resistance, corrosion resistance, high strength, high hardness, chemical stability and low coefficient of expansion of ceramics, but also has unique light transmittance, so that it can have more applications.
Diverse Applications
Alumina ceramics are widely used in machinery, optical fiber, cutting tools, medical, food, chemical industry, aerospace and other industries.
Transparent ceramics are mainly used in lighting fixtures, laser materials, infrared window materials, flashing ceramics, electro-optical ceramics, bulletproof materials, etc.
Mingrui Ceramics specializes in the production and processing of alumina and zirconia ceramic structural parts. Welcome to inquire about photos!
