Ads
related to: zirconium oxide vs zirconia gas fuel system for sale
Search results
Results from the WOW.Com Content Network
[11] [12] [13] Zirconia stabilized with yttria (yttrium oxide), known as yttria-stabilized zirconia, can be used as a strong base material in some full ceramic crown restorations. [12] [14] Transformation-toughened zirconia is used to make ceramic knives. [15] Because of the hardness, ceramic-edged cutlery stays sharp longer than steel edged ...
Scheme of a solid-oxide fuel cell. A solid oxide fuel cell (or SOFC) is an electrochemical conversion device that produces electricity directly from oxidizing a fuel. Fuel cells are characterized by their electrolyte material; the SOFC has a solid oxide or ceramic electrolyte.
During this time when the hot cladding is exposed to steam some oxidation of the zirconium will occur to form a zirconium oxide which is more zirconium rich than zirconia. This Zr(O) phase is the α-phase, further oxidation forms zirconia. The longer the cladding is exposed to steam the less ductile it will be.
The most common oxide is zirconium dioxide, ZrO 2, also known as zirconia. This clear to white-coloured solid has exceptional fracture toughness (for a ceramic) and chemical resistance, especially in its cubic form. [37] These properties make zirconia useful as a thermal barrier coating, [38] although it is also a common diamond substitute. [37]
The most common electrolyte, again similar to solid-oxide fuel cells, is a dense ionic conductor consisting of ZrO 2 doped with 8 mol-% Y 2 O 3 (also known as YSZ, ytrium-stabilized zirconia). Zirconium dioxide is used because of its high strength, high melting temperature (approximately 2700 °C) and excellent corrosion resistance.
Nuclear Fuel Complex supplies zircaloy clad uranium oxide fuel assemblies and zirconium alloy structural components for all 14 operating atomic power reactors in India. [2] The Hyderabad plant has a capacity to produce 250 tons of UO 2 per year and is expected to expand to a 600 tons per year capacity.
Solid oxide fuel cell (SOFC) A type of fuel cell in which the electrolyte is a solid, nonporous metal oxide, typically zirconium oxide (ZrO 2) treated with Y 2 O 3, and O 2− is transported from the cathode to the anode. Any CO in the reformate gas is oxidized to CO 2 at the anode. Temperatures of operation are typically 800–1,000 °C.
Corrosion resistance of zirconium alloys is enhanced by intentional development of thicker passivation layer of black lustrous zirconium oxide. Nitride coatings might also be used. Whereas there is no consensus on whether zirconium and zirconium alloy have the same oxidation rate, Zircaloys 2 and 4 do behave very similarly in this respect.
Ads
related to: zirconium oxide vs zirconia gas fuel system for sale