Thanks to its advantages of high temperature resistance, good insulation and high mechanical strength, alumina ceramics have become core fundamental materials in fields such as electronic packaging, high-temperature kilns and new energy.

In recent years, with the rapid development and upgrading of the electronics, new energy, semiconductor, and high-end equipment industries, alumina ceramics, as a core insulating and heat-dissipating material, have attracted extensive attention in the industry for their thermal properties.

The microstructural characteristics of alumina ceramics, such as grain size, microcracks, porosity and pore distribution, etc., will have an important impact on its thermal shock resistance.

Alumina ceramics is a ceramic material with alumina (Al2O3) as the main body, used for thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramics is a kind of ceramics with a wide range of uses. Because of its superior performance, it has become more and more widely used in modern society to meet the needs of daily use and special performance.

Alumina ceramics is an industrial ceramic with high hardness, which can only be processed by diamond grinding. It is made of bauxite and can be processed by injection molding, pressing, isostatic pressing, sliding castings and other methods.

High temperature resistance: Alumina ceramics can be used in the atmosphere up to 1650°C or 2900°F, and in the vacuum environment of 2000°C or 3600°F. At 1000 degrees Celsius, it maintains 50% of its tensile strength at room temperature. Although the strength of metals is weakened in high temperature environments, alumina ceramics retain their strength when they return to normal temperatures and remain unchanged. Alumina ceramics have high electrical resistivity and can reduce thermal shock, and increased purity will increase their electrical resistivity. Alumina ceramics become a perfect insulating material due to its dielectric level, etc., and current cannot pass through them.

Because alumina ceramics have relatively unique properties and have been valued in the market, the main thing is that they have also attracted the development and research of researchers, so that it can be used in air pollution control, the possibility of molten metal filtration, etc. However, many existing problems still need to be resolved in a timely and effective manner.

First of all, we want to introduce the crystal types of alumina. Alumina has three types of crystals, ionic crystals and atomic crystals, and one is somewhere in between. So, what does it have to do with alumina ceramics? Because there are atomic crystals in the crystals of alumina ceramics, the atomic crystals have the effect of not being afraid of alkalis and acids. Other alumina crystals, such as ionic crystals, will be converted into acid and alkali.

Grouting is actually an early molding method used for alumina ceramics. Because plaster molds are mainly used, the cost is relatively low, and it is also relatively easy to shape, even if the size and shape are more complex, it is easier to shape, but The key to grouting is the alumina slurry manufacturing equipment. Under normal circumstances, water is used as the main medium of the solvent. After that, the binder and debonding agent are added, and the exhaust is exhausted after sufficient grinding. It is poured into the plaster mold, because the capillary of the plaster mold will absorb the moisture, and the slurry will solidify in the plaster mold relatively quickly. If required, the excess material needs to be poured out, but in order to reduce the amount of shrinkage of the green body, we should try to use a relatively high-concentration slurry.

In fact, there are many types of alumina ceramics. If they are classified according to the main content of alumina, alumina ceramics can be divided into many types. Let’s learn about the characteristics and characteristics of the next several different alumina ceramics. Use it!