Preparation method of low-sodium and ultralow-sodium tabular sintered corundum

• Main Authors: MA ZHENG, ZHAO YI, WU XIAOYING, XUE JUNZHU, CHEN YAOSHENG, LI YUANYUAN
• Format: Patent
• Language: Chinese; English
• Published: 20.09.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention discloses a preparation method of low-sodium and ultralow-sodium tabular sintered corundum, which adopts industrial alumina powder as a raw material, and is characterized in that the preparation method comprises the following steps: (1) carrying out acid pickling on the industrial alumina powder, and controlling the sodium oxide content of the low-sodium industrial alumina powder obtained by drying through acid pickling and water washing to be lower than 0.1%; (2) sequentially grinding, balling and drying the industrial alumina powder obtained in the step (1), and then calcining at the temperature of 1700-1900 DEG C to obtain low-sodium tabular sintered corundum with the sodium oxide content of less than 0.1%; the preparation method comprises the following steps: (1) preparing low-sodium industrial alumina powder with sodium oxide content of less than 0.1%, (2) preparing low-sodium industrial alumina powder with sodium oxide content of less than 0.05%, (3) performing light burning on the low-sod