METHOD FOR PREPARING HEAT-RESISTANT CERAMIC BY LITHIUM SOLUTION PENETRATION

摘要

PURPOSE: A manufacturing method of a lithium aluminum silicate group heat-resistance ceramic by the lithium solution penetration is provided to satisfy thermal shock resistance and densification of heat-resisting ceramic pot by synthesizing beta-spodumene through penetrating lithium solution into a porcelain. CONSTITUTION: A manufacturing method of a lithium aluminum silicate group heat-resistance ceramic by the lithium solution penetration comprises the following steps: (a) A porcelain is powered and manufactures a mixed slurry; (b) The mixed slurry is molded; (c) The mold is first plasticized; (d) the first plasticized material is dipped in the lithium solution; and (e) the dipped plasticized material is dried and second plasticized. The porcelain comprises 20-40 weight% of kaolin, 10-30 weight% of pottery stone, 15-35 weight% of clay, 10-30 weight% of quartz, 5-15 weight% of enterolith, and 0.1-10 weight% of talc. The first plasticize is performed in the ambient environment at 800-1000 degree Celsius for 40-80 minutes. The lithium solution is any one selected lithium solution among lithium hydroxide, lithium nitrate, and their mixture. The second plasticize is performed at the raising temperature speed of 4 degree Celsius per minute at 1150-1250 degree Celsius. [Reference numerals] (a) Lithium solution concentration: ^* weight %; (b) Lithium solution concentration: 9 weight %; (c) Lithium solution concentration: 16 weight %