Alumina ceramic rods are made from alumina (aluminum oxide); the chemical composition of such ceramics typically involves silicon dioxide and calcium carbonate. A key aspect of the precision processing technology for alumina ceramics is powder preparation, a method that offers high forming rates, high operational efficiency, and a high product success rate.

95% alumina ceramics are primarily used for corrosion-resistant and wear-resistant components. 85% alumina ceramics are often blended with talc, which enhances the material’s electrical properties and mechanical strength; these can be sealed with metals such as molybdenum, niobium, and tantalum, and are sometimes used in vacuum electronic devices.

High-purity alumina ceramics can be used to create vessels for molten glass—serving as a substitute for platinum crucibles—and as sodium lamp tubes, thanks to their light-transmitting properties and resistance to corrosion by alkali metals. 99% alumina ceramic materials are mainly used to manufacture high-temperature crucibles, refractory furnace tubes, and specialized wear-resistant components, such as ceramic seals.

…such as water valves and ceramic bearings. 95% alumina electronic ceramics are primarily used for corrosion-resistant and wear-resistant components. 85% alumina ceramics are typically blended with talc, which enhances their electrical properties and mechanical strength; they can be hermetically sealed with metals such as molybdenum, niobium, and tantalum, and are utilized in vacuum electronic devices.

Regarding the graphitization and spheroidization of alumina ceramic components: under high-temperature conditions, the cementite within the ceramic structure aggregates or migrates due to high energy levels, transforming into coarse-grained cementite. This phase shifts from a lamellar (flake-like) structure to a spherical form—a process known as spheroidization. Since graphite possesses very low strength and typically exists as flakes, this transformation leads to a significant reduction in material strength and increased brittleness; consequently, this phenomenon is referred to as graphitization.