Alumina is hollow the ball is a kind of bulbiform hollow little grain, make by alumina. And alumina is hollow ball brick is alumina hollow ball serves as main raw material, a kind of when make through the craft such as high temperature agglomeration light simple fireproof stuff. Relative to the fireproof material at the tradition, hollow ball brick has alumina higher fireproof performance, more be machined easily and install. In the application that received in high temperature industry.
Alumina is hollow the ball is a kind of bulbiform material that makes by alumina, it has hollow structure, interior is air or other gas. The diameter of hollow ball can be in alumina a few micron arrive between several millimeter change.
Hollow ball has alumina a lot of advantages, for example: They are very light, density is very low, can serve as sound-absorbing material is used; Their watch area is very large, can use as accordingly activator; Their thermal stability is very good, can use at high temperature application; They have good mechanical strength and hardness, can use at making light qualitative composite material wait.
Hollow ball can pass alumina physics or chemical method preparation. Physical method includes pattern plate method, evaporate law, collosol - gel law. Chemical method includes hydrolysis law, combustion law to wait. The choice of these methods depends on the dimension of hollow ball, appearance mixes needs alumina property.
Alumina is hollow the ball has wide application in a lot of domains, for example: As activator, sound-absorbing material, heat-insulating material, light qualitative composite material, medical material.
Have 0.6 substance close alumina hollow ball brick normally the density of hollow ball brick is in alumina 1.3g/cm3 left and right sides, specific depend on of material deserve to compare, the element such as the norms that processes craft and product, do not have 0.6 body at present close, under 1.3 body close do not have intensity.
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