The Most Common Method of Producing Zirconia (ZrO2) Powder

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What is zirconia

Zirconium Dioxide has the chemical formula ZrO2. It is zirconium’s main oxide. Normal conditions result in a white, tasteless and odorless crystal. It’s insoluble with water, hydrochloric or dilute sulfuric acid. Chemically, it is inactive. Its properties include high melting point and resistivity, as well as high refractive indices and low thermal expansion coefficient.

Plasma method

A gas is ionized significantly when heated to 3000degC and nearly completely by 5500degC. The electron flow can cause a gas to reach high temperatures when heated by resistance under an electric field. Plasma is the name given to this highly dissociated and thermally conductive gas. Plasma cannot be produced by heating the gas. Rather, it is generated through arc discharge. A plasma spray gun is the easiest plasma generator. In order to generate plasma, two electrodes are connected with a direct-current voltage. At the same time, an inert gas is passed (nitrogen argon helium, or their mixtures) between the electrodes. By using a high frequency current or a short circuit, a stable DC-arc is created between the two electrodes. This causes the gas to absorb energy, forming a high-temperature flame. The zircon fine-powder sent into flames is instantly decomposed to ZrO2 an SiO2, then SiO2 is evaporated and separated from ZrO2 in order to prepare and purify ZrO2.


The plasma-produced high-purity ZrO2 is a unique material. Plasma ZrO2 particles are spherical, whereas mZrO2 Crystals are very small. The practice has shown that ZrO2 crystalline materials formed at high temperatures are very active, and this is crucial for the production of high performance ceramic materials. Also, the plasma process is continuously being improved.


The ZrO2 high-purity produced can be adjusted to suit the customer’s needs. It has a maximum ZrO2 of 99.6% and a particle size above. The high-purity ZrO2 produced is white. If the ZrO2 level is low, then it will be pale yellow or yellowish brown. Stable zirconia tends to be pale yellow. All zirconia materials mentioned above are in monoclinic phases.


(aka. Technology Co. Ltd., a reputable global chemical material manufacturer and supplier with more than 12 years experience in the supply of super high quality nanomaterials and chemicals. The ZrO2 powder that we produce is of high purity with a fine particle size. If you need lower, please Contact us.