The difference between alumina ceramics and transparent ceramics

Release time：2024-09-11click：1

Different concepts
Alumina ceramic is a ceramic material based on aluminum oxide (Al2O3).
Transparent ceramics are ceramics with transparent properties obtained by using high-purity ultra-fine ceramic raw materials and eliminating pores through technological means.

Ingredients and classificationsDifferent
Alumina ceramics are divided into two types: high purity type and ordinary type.
High-purity alumina ceramics are ceramic materials with an Al2O3 content of more than 99.9%. Since their sintering temperature is as high as 1650-1990°C and the transmission wavelength is 1-6 μm, they are generally made into molten glass to replace platinum crucibles; their light transmission is used It is used as sodium lamp tube due to its corrosion resistance and resistance to alkali metal corrosion; it can be used as integrated circuit substrate and high-frequency insulating material in the electronics industry.
Ordinary alumina ceramics are divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain and other varieties according to the Al2O3 content. Sometimes those with an Al2O3 content of 80% or 75% are also classified as ordinary alumina ceramic series. Among them, 99 alumina porcelain is used to make high-temperature crucibles, refractory furnace tubes and special wear-resistant materials, such as ceramic bearings, ceramic seals and water valves; 95 alumina porcelain is mainly used for corrosion-resistant and wear-resistant parts; 85 porcelain Because some talc is often incorporated into it, the electrical properties and mechanical strength are improved. It can be sealed with molybdenum, niobium, tantalum and other metals, and some are used as electronic vacuum device components.
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. Ceramics, magnesia-aluminum spinel transparent ceramics, etc.

Different performance
Alumina ceramic properties:
1. High hardness
As measured by the Shanghai Ceramic Institute of the Chinese Academy of Sciences, its Rockwell hardness is HRA80-90, which is second only to diamond in hardness 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 equivalent to 266 times that of manganese steel and 171.5 times that of high chromium cast iron. According to our customer tracking surveys over more than ten years, under the same working conditions, the service life of the equipment can be extended by at least ten times.
3. Light weight
Its density is 3.5g/cm3, which is only half that of steel, which can greatly reduce the equipment load.
Transparent ceramic properties:
As a branch of advanced ceramics, transparent ceramics not only inherit the high temperature resistance, corrosion resistance, high strength, high hardness, chemical stability, and low expansion coefficient of ceramics, but their unique light transmittance allows them to be used in many applications.

Different applications
Alumina ceramics are widely used in machinery, optical fiber, cutting tools, medical care, 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, and bulletproof materials.

Mingrui Ceramics specializes in the production and processing of alumina and zirconia ceramic structural parts. Welcome to inquire for pictures!