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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, 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 coefficients.
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. This highly dissociated and thermally conductive gas is known as plasma. The plasma is generally obtained through arc discharge, not by heating up the gas. A plasma spray gun is the easiest plasma generator. In order to generate plasma, two special electrodes are connected with a direct-current voltage. At the same time, an inert gas is blown between them (such as nitrogen, argon or helium) and the current is then applied. 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 ZrO2andSiO2, with SiO2 being evaporated from ZrO2 in order to prepare and purify ZrO2.
Plasma ZrO2 is a high-purity ZrO2 with unique properties. Plasma ZrO2 particles are spherical, and the 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 based on the requirements. 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.
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