Synthesis of cordierite from rectorite-Talc-alumina without additives

Abstract

Rectorite, Talc and alumina were used to obtain high-quality cordierite with stoichiometric composition (51.3wt% SiO ₂, 34.9wt% Al ₂ O₃, 13.8wt% Al ₂O₃).The water absorption, apparent porosity, bulk density, thermal expansion coefficient, crystalline phases and microstructure were tested by means of X-ray diffractometer (XRD), scanning electronic microscopy (SEM), Archimedes immersion technique, etc. This work systematically studied the synthesizing process of the cordierite. The result shows that the cordierite can be synthesized at a lower temperature and within a wider temperature range by using the rectorite as clay raw materiah.

Keywords

rectorite / cordierite / synthesizing process

References

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