Characteristics and Application of Zirconia ZrO2 Powder

Overview of Zirconia ZrO2 Powder

Zirconium dioxide (ZrO2), sometimes called zirconia (not to be confused with zircon), is the white crystalline oxide of zirconium. Its most naturally occurring form has a monoclinic crystal structure and is the mineral bentonite. Dopant-stabilized cubic zirconia, cubic zirconia, synthetic various colors, used as gem and diamond simulants.

Zirconia is not chemically reactive. Slowly corroded by concentrated hydrofluoric acid and sulfuric acid. When heated with carbon, it converts to zirconium carbide. When heated with carbon in chlorine, it is converted to zirconium tetrachloride.

Zirconia is one of the most studied ceramic materials. ZrO2 adopts a monoclinic crystal structure at room temperature and transforms into tetragonal and cubic crystals at higher temperatures. The volume change caused by the structure of the four-direction monoclinic to cubic transformation will generate greater stress, which will cause it to crack when cooled at high temperatures.

Three phases are known: monoclinic phase below 1170°C; tetragonal phase between 1170°C and 2370°C; cubic phase above 2370°C. Generally, the trend is to have higher symmetry at higher temperatures. A small portion of calcium or yttrium oxide is stabilized in the cubic phase. Rare mineral Tazheranite (Zr, Ti, Ca) O2 is a cube. Unlike TiO2, which has six-coordinated titanium in all phases, monoclinic zirconia is composed of seven-coordinated zirconium centers. This difference is due to the larger size of zirconium atoms relative to titanium atoms.

The band gap of ZrO2 depends on the phase (cubic, tetragonal, monoclinic or amorphous) and preparation method, and the typical estimate is 5-7 eV. A special case of zirconia is tetragonal zirconia polycrystalline or TZP, which means polycrystalline zirconia consisting of only a metastable tetragonal phase.

Zirconia ZrO2 powder characteristics

The chemical properties of zirconium dioxide are inert, with high melting point, high resistivity, high refractive index, low thermal expansion coefficient and other characteristics. It is an important high temperature resistant material, ceramic insulating material, ceramic sunscreen material, and the main source of artificial diamonds. part. Raw materials. The band gap is about 5-7eV.

Application of Zirconia ZrO2 Powder

Zirconia ZrO2 is used in metal zirconium and zirconium compounds, refractory bricks and crucibles, high-frequency ceramics, abrasives, ceramic pigments and zirconates. It is mainly used in piezoelectric ceramic products, daily ceramics, refractory materials and precious metal smelting zirconium bricks and zirconium. Tubes, crucibles, etc.

Refractory

Zirconia ZrO2 fiber is a polycrystalline refractory fiber material. Due to the high temperature resistance of ZrO2 material such as high melting point and non-oxidation, the use temperature of ZrO2 fiber is higher than other refractory fibers, such as alumina fiber, mullite fiber, aluminum silicate fiber and so on. Zirconia fiber is used for a long time in an ultra-high temperature oxidizing atmosphere above 1500°C, the highest temperature is as high as 2200°C, and even 2500°C can still maintain a complete fiber shape, which is the highest current theme. Fiber material.

Gas turbine

Plasma sprayed zirconia thermal barrier coatings have made great progress in the application of air and industrial gas turbines, and have been applied to the turbine part of gas turbines to a certain extent. Since the coating can reduce the temperature of the air-cooled high-temperature component to 50-200°C, the durability of the high-temperature component can significantly improve the durability of the high-temperature component, or the temperature of the gas can be increased. Lower the temperature or lower the temperature required to maintain high-temperature components. Changes to improve the efficiency of the engine.

Ceramic material

Zirconia ZrO2 is used in the kiln industry because of its high refractive index, high melting point and strong corrosion resistance. Piezoelectric ceramic products include filters, speakers and ultrasonic water detectors. There are also daily ceramics (industrial ceramic glazes), zircon bricks and zirconium tubes used for precious metal smelting. Nano-scale zirconia can also be used as a polishing agent, abrasive, piezoelectric ceramics, precision ceramics, ceramic glazes and high-temperature pigment matrix materials.

Treatment

In addition, zirconia ZrO2 can also be used to make incandescent gas masks, enamel, white glass and refractory crucibles. X-ray photography. Abrasive. Used to make light source lamps, thick film circuit capacitor materials, and piezoelectric crystal transducer formulas in infrared spectrometers.

Zirconia ZrO2 powder price

The price of zirconia ZrO2 powder will vary randomly with factors such as the production cost, transportation cost, international situation, exchange rate, market supply and demand of zirconia ZrO2 powder. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for zirconia ZrO2 powder, please feel free to send to get the latest zirconia ZrO2 powder price.

Zirconia ZrO2 powder supplier

As a global supplier of zirconia ZrO2 powder, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced technology and engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.