Tubes Made from Al2O3 Ceramic for High-Temperature Technology - an Orientational Comparison

Tubes made from high-quality, dense-sintered Al2O3 ceramic are reliable components in the plants of the glass and metal producing and processing industries, industrial kiln engineering and the basic chemical industry. In such plants, the service conditions often require an extremely high strength of the ceramics shape in a corrosive environment and a high thermal shock resistance. Commercially available tubes from six manufacturers were tested in an orientational study, with regard to these properties. The results of the tests revealed some drastic differences between the various types. Among the dense-sintered ceramics, the materials and products behaviour of Degussit AL23 demonstrated the optimum combination of these three properties. The Degussit AL23 strength of shape is only surpassed by Degussit AL24, a material especially developed for the high-temperature technology.