The invention relates to a low-temperature rapid preparation method of MgAlON transparent
ceramic with high
infrared transmittance, and belongs to the field of
ceramic preparation. The method comprises the following steps: designing the
chemical composition of MgAlON according to an Al2O3-AlN-MgO
phase diagram, synthesizing pure-phase MgAlON
powder by using 76-77 wt.% of gamma-Al2O3, 13-14 wt.% of AlN and 9-9.6 wt.% of MgAl2O4 as raw materials through a high-temperature
solid-
phase method, adding a
sintering aid, carrying out ball milling,
drying to obtain MgAlON /
sintering aid mixed
powder, carrying out dry-pressing molding to prepare a blank, heating the blank to 1780-1900 DEG C at a speed of 10-40 DEG C / min in a
nitrogen atmosphere, carrying out heat preservation for 30-180 minutes, carrying out heat preservation for 20-30 minutes at a speed of 10-40 DEG C / min, carrying out heat preservation for 20-30 minutes at a speed of 20-30 DEG C / min, and the MgAlON transparent
ceramic is prepared. The method has the characteristics of controllable
chemical composition, simple
sintering equipment, low sintering temperature, short heat preservation time, high
infrared transmittance of the prepared MgAlON ceramic and the like, and is good in energy-saving effect, high in efficiency, low in cost, suitable for preparation of large-size and complex-shape sample pieces and easy to realize industrialization.