After reading this article, if you don’t believe me, you still don’t know about zirconia ceramics

Pintejin Ceramics is a professional manufacturer of zirconia ceramics. Do you know enough about zirconia ceramics? The following is a detailed introduction of zirconia ceramics by Pintejin ceramic manufacturers.

Zirconia Ceramic Sheet Pure zirconia ceramic is white, yellow or gray when it contains impurities, and generally contains HfO2, which is not easy to separate. The world’s proven zirconium resources are about 19 million tons, and zirconia is usually obtained by purifying zirconium ore. There are three crystal states of pure ZrO2 under normal pressure: monoclinic (Monoclinic) zirconia (m-ZrO2), tetragonal (Tetragonal) zirconia (t-ZrO2) and cubic (Cubic) zirconia (c-ZrO2). The production of zirconia ceramics requires the preparation of powders with high purity, good dispersion properties, ultra-fine particles and narrow particle size distribution. There are many preparation methods for zirconia ultra-fine powder. The purification of zirconia mainly includes chlorination and thermal decomposition, alkali metal Oxidative decomposition method, lime melting method, plasma arc method, precipitation method, colloid method, hydrolysis method, spray pyrolysis method, etc.

Application of zirconia ceramic cutter: In structural ceramics, because zirconia ceramics have the advantages of high toughness, high flexural strength, high wear resistance, excellent thermal insulation performance, and thermal expansion coefficient close to steel, it is widely used in Structural ceramics field. Mainly include: Y-TZP grinding balls, dispersing and grinding media, nozzles, ball valve seats, zirconia molds, micro-fan shafts, fiber optic pins, fiber optic sleeves, wire drawing dies and cutting tools, wear-resistant knives, clothing buttons, Cases and straps, bracelets and pendants, ball bearings, light bats for golf balls, and other room temperature wear-resistant parts. In terms of functional ceramics, its excellent high temperature resistance is used as induction heating tubes, refractory materials, and heating elements. Zirconia ceramics have sensitive electrical performance parameters and are mainly used in oxygen sensors, solid oxide fuel cells (SOFC) and high temperature heating elements. ZrO2 has a high refractive index (N-21^22), adding certain coloring elements (V2O5, MoO3, Fe2O3, etc.) to the ultra-fine zirconia powder, it can be made into colorful translucent polycrystalline ZrO2 material , shining like a natural gemstone with brilliant and colorful light, it can be made into a variety of decorations.

Toughening method: Zirconia is a special material. The toughening method is mainly achieved by using the phase transformation of zirconia! Pure zirconia is a white solid, and when it contains impurities, it will appear gray or light yellow, and it can also display various other colors when a color developer is added. The molecular weight of pure zirconia is 123.22, the theoretical density is 5.89g/cm3, and the melting point is 2715℃. Usually contains a small amount of hafnium oxide, which is difficult to separate, but has no significant effect on the properties of zirconium oxide. Zirconia has three crystal forms: monoclinic, tetragonal, and cubic. At room temperature, zirconia only appears as a monoclinic phase, and when heated to about 1100 °C, it transforms into a tetragonal phase, and when heated to a higher temperature, it transforms into a cubic phase. Since a large volume change occurs when the monoclinic phase changes to the tetragonal phase, and a large volume change occurs in the opposite direction when cooling, it is easy to cause cracking of the product, which limits the application of pure zirconia in high temperature fields. . However, after adding the stabilizer, the tetragonal phase can be stabilized at room temperature, so there will be no sudden change in volume after heating, which greatly expands the application range of zirconia. The raw material used as stabilizer on the market is mainly yttrium oxide.

Pintejin Ceramics is a professional manufacturer of industrial ceramics, mainly engaged in the research and development and production of zirconia ceramics and alumina ceramics. We can process ceramic products according to your drawings, specializing in the production of high-precision ceramic rods, ceramic tubes, ceramic rings, ceramic plates, ceramic flanges, ceramic nozzles, and customized precision ceramic parts, etc.