Review article

The article presents the results of manufacturing of laboratory samples of miniature bricks (65x31x26 mm) from clay raw materials for coarse building ceramics using the vacuum extrusion method, including ultrasonic vibrations of the die. Samples after firing in a muffle furnace at 980 °C were tested for compressive and bending strength. There is discussed significant acceleration of the exit of the clay from the die, the pressure drop in it, compaction and strengthening of the ceramics caused by ultrasonic effect on the molded clay. This exposure provides prerequisites for the production of clinker.