Semplice comprensione della ceramica di allumina
Semplice comprensione della ceramica di allumina
Alumina ceramics are the most common advanced precision ceramic materials, e sono anche materiali relativamente tradizionali. Le ceramiche di allumina ad alta purezza sono state ampiamente utilizzate in molti settori come eccellente materiale ceramico. Questo materiale ha eccellenti prestazioni nell'isolamento elettrico, alta conducibilità termica, elevata resistenza chimica, buona resistenza all'usura, e bassa dilatazione termica.
Allumina ceramica can be divided into multiple application levels based on their alumina content, di cui 99% sono utilizzati per realizzare crogioli ad alta temperatura, refractory furnace tubes, and special wear-resistant materials, such as ceramic bearings, ceramic seals, and water valve pieces; 95% – 96% alumina ceramics are mainly used as corrosion resistant and wear-resistant components and circuit boards.
Properties of alumina:
Excellent electrical insulation (1 × 10 14〜1 × 10 15 Ω cm);
Medium to ultra high mechanical strength (300 a 630 MPa);
Extremely high compressive strength (2000 a 4000 MPa);
Elevata durezza (15 a 19 GPA);
Medium thermal conductivity (20 a 30 W/MK);
High corrosion and wear resistance;
Good grinding performance;
Bassa densità (3.75 a 3.95 g/cm3);
The operating temperature without mechanical load is 1000 a 1500 ° C;
Biological inertia, food compatibility.
Overview of the differences between alumina ceramic rods and zirconia ceramic rods
Ceramic rods, also known as ceramic rods, are mainly made of zirconia ceramic and alumina ceramic raw materials and calcined. The market demand for ceramic rods is very large, and they have been widely used in national defense, aerospaziale, industrial production, and other industries. The need for ceramic rods varies from field to field. The main issues to be considered are: resistenza all'usura, fire resistance, Resistenza alle alte temperature, resistenza alla corrosione, and wettability of ceramic rods.
Il ceramico rods are mostly ivory white, and the commonly used colors are dark blue ceramic rods, light yellow ceramic rods, gray black ceramic rods, ecc
Zirconia ceramic rod:
Zirconia ceramic rod has good wear resistance, elevata durezza, strong compression resistance, and a density of over 6.0. The main advantage of zirconia ceramic rod is its good ductility! Zirconia ceramic rods are widely used in industries such as motor shafts, motor shafts, macinatura, needle gauges, and especially in the heat removal commodity industry, rather than traditional stainless steel center rods.
Alumina ceramic rod:
The alumina ceramic rod can withstand high temperatures up to about 1700 gradi Celsius, and has good electrical conductivity, impact toughness, and high temperature resistance. The alumina ceramic rod has low density and convenient transportation, but its ductility is poor and it is easy to crack and crush; Alumina ceramic rods are widely used and have already infiltrated various fields such as electronic and electrical, mechanical equipment manufacturing, and so on
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To go from properties to process, the next step is precision cutting of alumina.
