After oxygen-enriched sintering, the oxidizing atmosphere
increases during sintering, and some [Fe.sub.3][O.sub.4] is oxidized into [Fe.sub.2][O.sub.3], further reducing the FeO in the sintered ore.
SCR technology is designed to permit NOx reduction reactions to take place in an oxidizing atmosphere
. It is called "selective" because it reduces levels of NOx using ammonia as a reductant within a catalyst system.
Two firing schedules were selected (i) An oxidizing atmosphere
was used to the maturing temperature of the glaze and the kiln was then sealed and allowed to cool to 700oC and reducing atmosphere for 25 to 30 minutes rising temperature from 50o to 70oC.
This oxide is commonly on the surface of stainless steel when exposed to oxidizing atmosphere
. (29) By TEM, Wilson found, for the first time, that Mn[Cr.sub.2][O.sub.4] precipitates on the surface of low carbon, low alloy steel, and this oxide is responsible for the "edge defect" during tin plating.
The low coefficient of expansion 0.3 x [10.sup.-6] C provides resistance to thermal shock up to 1200 O in an oxidizing atmosphere
and permits its use with rapid variation in temperature in that zone.
Ancillary equipment available for experiments on BM16 includes a liquidhelium-cooled cryostat, for spinning capillary and flat-plate specimens down to 4.15 K, and below with pumping; a cold-nitrogen-gas blower for capillary specimens in the range 80 K to 373 K; a hot-air blower for capillary specimens up to 950 [degrees]C; a high-temperature oven for spinning flat-plate specimens up to 1600 [degrees]C in vacuum, and 1200 [degrees]C in an oxidizing atmosphere
; a capillary cell for condensing volatile samples in situ, or for treatment of samples in different atmospheres or under vacuum; translation stages for mapping residual strain in engineering components.
The materials selected included carbonates, nitrates, borates, sulfates and several metal oxides, each of which is capable of providing an oxidizing atmosphere
under equilibrium conditions at the pouring temperatures employed.
He is a world-recognized expert in the area of selective oxidation of light alkanes and [NO.sub.x] reduction in an oxidizing atmosphere
, and has contributed significantly in the areas of supported Au catalysis and hydrocarbon cracking over acidic zeolites.
Upon admission of an oxidizing atmosphere
, carbon black burns off leaving ash.
Instead, Carmichael suspects that all the titanohematites resulted from the magma interacting with the oxidizing atmosphere
of the earth.