Classification of ceramic laboratory instruments with high temperature resistance and chemical stability used in manufacturing industry laboratory and R&D departments. Includes alumina crucibles, zirconia crucibles, quartz crucibles, ceramic evaporating dishes, porcelain mortars, ceramic combustion boats, high-temperature ceramic tubes, etc. Used for experiments under high temperature conditions above 1000°C such as metal material melting tests, inorganic material firing experiments, catalytic reaction tests, and high-temperature analysis. This specialized instrument group is designed for material testing and quality control testing in high-temperature, strong acid, and strong alkali environments that glass instruments cannot withstand, clearly distinguished from general glass laboratory instruments and metal instruments.