Zirconium Oxide ZrO2 powder CAS 1314-23-4

What is Zirconium Oxide ZrO2 powder ？

Zirconium dioxide ZrO2, sometimes known as zirconia (not to be confused with zircon), is a white crystalline oxide of zirconium. The mineral baddeleyite is the most naturally occurring form, with a monoclinic crystalline structure. A dopant stabilized cubic structured zirconia, cubic zirconia, is synthesized in various colors as a gemstone and a diamond simulant.

Zirconia is chemically unreactive. It is slowly attacked by concentrated hydrofluoric acid and sulfuric acid. When heated with carbon, it converts to zirconium carbide. When heated with carbon in the presence of chlorine, it converts to zirconium tetrachloride.

Zirconium oxide is one of the most studied ceramic materials. ZrO2 adopts a monoclinic crystal structure at room temperature and transitions to tetragonal and cubic at higher temperatures. The volume change caused by the structure transitions from tetragonal to monoclinic to cubic induces large stresses, causing it to crack upon cooling from high temperatures.

Three phases are known: monoclinic below 1170 °C, tetragonal between 1170 °C and 2370 °C, and cubic above 2370 °C. The trend is for higher symmetry at higher temperatures, as is usually the case. A small percentage of the oxides of calcium or yttrium stabilize in the cubic phase. The rare mineral tazheranite (Zr, Ti, Ca)O2 is cubic. Unlike TiO2, which features six-coordinated titanium in all phases, monoclinic zirconia consists of seven-coordinated zirconium centers. This difference is attributed to the larger size of the zirconium atom relative to the titanium atom. 

The ZrO2 band gap depends on the phase (cubic, tetragonal, monoclinic, or amorphous) and preparation methods, with typical estimates from 5–7 eV. A special case of zirconia is that of tetragonal zirconia polycrystal, or TZP, indicative of polycrystalline zirconia composed of only the metastable tetragonal phase.

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Performance of Zirconium Oxide ZrO2 powder :

The chemical property of zirconium dioxide is inactive. It has the properties of high melting point, high resistivity, high refractive index, and low coefficient of thermal expansion, making it an important high-temperature resistant material, ceramic insulating material, and ceramic sunscreen. It is also the main part of artificial drills. Raw material. The band gap is about 5-7eV.

Technical Parameter of Zirconium Oxide ZrO2 powder :

Zirconium Oxide particle size: 200nm

Zirconium Oxide crystal: monoclinic crystal

Zirconium Oxide purity: 99.9%

Fe2O3 content: ≤0.003

SiO2 content: ≤0.003

TiO2 content: ≤0.03

Al2O3 content: ≤0.002

Na2O content: ≤0.001

CaO content: ≤0.002

How is Zirconium Oxide ZrO2 powder produced?

The industrial refractory material is stably zirconia, and most of the electric mete is made. Carbon and stabilizable calcium oxide were added to the zircon meter fuse, and the zirconia and calcium oxide were used to generate a solid solution and then stably zirconia was produced. At the same time, the zirconia and the calcium oxide were used to form a solid solution. Stable and partially stabilized zirconia used in fine ceramics is generally prepared wet.

The most mature and commonly used is neutralization. The purified chloride zirconium is dissolved with pure water, filtrate the insoluble matter, adjust the zirconium concentration in the solution, and add the required amount of a cerium chloride solution (or other rare earth metal or alkaline chloride solution), add ammonia water Medium and precipitation. The residue was washed with hot water, filtered, dried, and calcined. Ultrafine stabilized zirconia powder can be obtained by treating the calcined product.

Partially stabilized zirconia is to control the amount of added stabilizer, which is not sufficient to achieve complete stability. Partially stabilized zirconia has high strength and thermal shock resistance, and structural ceramics have a relatively wide application.

Applications of Zirconium Oxide ZrO2 powder:

For metal zirconium and zirconium compounds, fire bricks and crucibles, high-frequency ceramics, abrasive materials, ceramic pigments, and zirconates are mainly used for piezoelectric ceramic products, daily ceramics, refractory materials, and precious metals smelting Zirconium brick, zirconium tube, the crucible, etc.

Refractory

Zirconia fibers are polycrystalline refractory fiber material. Due to the high melting point of the ZrO2 substance itself, the non-oxidation, and other high-temperature excellent characteristics, the ZrO2 fiber has higher use temperatures than other refractory fibers such as alumina fibers, mullite fibers, and aluminum silicate fibers. The zirconia fiber is used for a long time in a super high-temperature oxidation atmosphere above 1500 ° C. The highest temperature is as high as 2200 ° C, and even 2,500 ° C can maintain a complete fiber shape, which is currently the top of the topic. Fiber material.

Gas turbine

The application of plasma spray zirconium dioxide thermal barrier coating on air and industrial gas turbines has made great progress, which has been used for turbine portions of gas turbines within a certain limit. Since this coating can reduce the temperature of 50 to 200 ° C of the air-cooled high-temperature member, the durability of the high-temperature member can significantly improve the durability of the high-temperature member or improve the temperature of the gas temperature or reduce the amount of temperature required to maintain the high-temperature member. Change, thereby increasing the efficiency of the engine.

Zirconium Oxide Ceramic material

Since the refractive index of zirconia is large, the melting point is high, and the corrosion resistance is strong, so it is used in the kiln industry. Piezoelectric ceramic products include filters, speakers, ultrasonic water detectors, etc. There are also daily use ceramics (industrial ceramic glaze), zircon tiles, and zirconium tubes for precious metal smelting. Nano-grade zirconia can also be used as a polishing agent, abrasive, piezoelectric ceramic, precision ceramic, ceramic glaze, and high-temperature pigment matrix material.

Storage Condition of Zirconium Oxide ZrO2 powder :
Zirconium Oxide ZrO2 powder should be stored in dry, cool and sealing of the environment, cannot be exposed to air, in addition should avoid the heavy pressure, according to ordinary goods transportation.

Packing & Shipping of Zirconium Oxide ZrO2 powder :
It is packed in double plastic bags inside, which can be filled with argon in vacuum; it can be vacuumed and filled with argon for protection..
Zirconium Oxide ZrO2 powder  packing: vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
Zirconium Oxide ZrO2 powder  shipping: could be shipped out by sea , by air, by express as soon as possible once payment receipt.


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