Glazed brick with introduced ultrafine oxides to improve glaze hardness and preparation method thereof

The invention belongs to the technical field of building ceramic production, and specifically relates to a glazed brick with introduced ultrafine oxides to improve the glaze hardness and a preparation method thereof. The glazed brick is prepared from the following raw materials in percentage by weight through sintering: basic glaze composed of 0 to 100% of raw material glaze and 0 to 100% of frits, ultrafine alumina or ultrafine aluminum hydroxide accounting for 0.1 to 15 wt% of basic glaze, ultrafine silicon oxide or ultrafine silicon oxide precursor accounting for 0.1 to 10 wt% of basic glaze, lithium compound accounting for 0.1 to 15 wt% of basic glaze, and glaze property regulator. By introducing ultrafine oxides or ultrafine oxide precursors (hydroxides), glazed bricks with high hardness glaze and multiple colors can be produced. According to the provided formula, the equipment of building ceramic factories does not need to be updated or modified, and the glazed brick with high hardness glaze can be prod