◆ Overview:
Polycrystalline zirconia fiber is a high‑temperature‑resistant fiber prepared by the sol–gel method. With a purity of ZrO2 plus phase stabilizer ≥ 99.5%, it is currently the only lightweight polycrystalline refractory fiber capable of long‑term service at temperatures exceeding 1600°C in ultra‑high‑temperature oxidizing atmospheres. The product exhibits excellent properties, including a high melting point of 2713°C, a high service temperature, superior thermal insulation, stable chemical behavior at elevated temperatures, resistance to corrosion and oxidation, good thermal shock resistance, non‑volatility, and zero environmental pollution. It holds broad application prospects in cutting‑edge military technologies as well as in civilian industrial sectors.
◆ Product Performance Advantages:
① Highest operating temperature. The maximum service temperature is 2,200°C, and it can even retain its full fibrous structure at up to 2,500°C.
② It exhibits the best thermal insulation performance. Among all metal oxides, ZrO2 has the lowest thermal conductivity.
③ It exhibits the best corrosion resistance. The acid- and alkali‑resistance of ZrO2 is significantly superior to that of Al2O3 and SiO2.
④ It is resistant to volatilization at high temperatures and is non‑polluting. Among all metal oxides, ZrO2 exhibits the lowest vapor pressure at elevated temperatures and possesses chemical inertness, making it highly resistant to volatilization and free from pollution under high‑temperature conditions.
◆ Product Application Prospects:
① As an ultra‑high‑temperature thermal insulation composite, protective material, ablation material, and separator for satellite batteries, it is employed in critical sectors such as aerospace, military defense, and nuclear energy.
② As a lining material for ultra‑high‑temperature industrial electric furnaces, gas furnaces, experimental electric furnaces, and other high‑temperature heating devices operating at temperatures exceeding 1,700°C up to 2,000°C, it not only exhibits excellent thermal insulation but also meets the stringent requirements of rapid heating and cooling. It is widely employed in numerous fields, including ceramic sintering, crystal growth, ultra‑high‑temperature decomposition, metal smelting, petroleum cracking, high‑temperature heat treatment of materials, and scientific research and experimentation.
③ It is combined with numerous metals, alloys, and glasses to fabricate ultra‑strong metal matrix composites suitable for use over a wide temperature range.
④ As a high-temperature filtration material, a support for high-temperature reaction catalysts, and a carrier for automotive exhaust purification, among other applications. It is used for filtering impurities from liquids or gases at elevated temperatures, as well as for catalyzing synthesis or cracking reactions under high-temperature conditions.
◆ Performance Specifications:

◆ Production Process:
The manual does not include process flow diagrams or equipment images (due to technical confidentiality).
◆ Product application scope:
This product is widely used in industrial equipment sectors such as semiconductors, silicon carbide, aerospace, and defense.