Alumina hollow ball is a new type of high-temperature thermal insulation material, which is a corundum material made of industrial alumina as raw material and smelted and blown at high temperature in an electric furnace. The crystal form of the alumina hollow ball is a-Al2O3 microcrystal. So how should alumina hollow ball be selected?
Alumina hollow ball, as a light refractory material with high temperature resistance and excellent energy saving, are usually used in high temperature kilns as ultra-high temperature insulation fillers. For this purpose, we need to refer to the sodium oxide content of the alumina hollow ball. The sodium oxide content is too high, which is easy to cause the collapse of the kiln.
Alumina hollow ball are used in the production of alumina hollow ball bricks. In addition to paying attention to the content of sodium oxide, products with suitable sphere wall thickness should also be selected. The wall of the alumina hollow ball is too thick, which is not conducive to the separation of thermal energy, and also increases the cost of the manufacturer, but the wall is too thin, and its bearing capacity will be affected. Therefore, we require the best of both worlds, that is, to take into account its support and save the cost of manufacturers.
Alumina hollow ball are used as ordinary castables, and a reasonable choice should be made according to the ambient temperature you need. There are two types of ceramic alumina hollow ball and ceramic regenerated alumina hollow ball. If the ambient temperature is lower than 1650 ℃, you can try to use ceramic regenerated alumina hollow ball, because it not only meets your environmental needs at higher temperatures, but also helps you Cost savings.
