Production of beta-alumina ceramic articles and furnace therefor
AssigneeThe Electricity Council
InventorsLyndon James Miles, Ivor Wynn Jones
Life of this patent
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Abstract
In making .beta.-alumina ceramic articles by a fast firing technique in which the green shapes of compressed powder material are sintered by passing them continuously through a tubular furnace, the furnace is sloped upwardly to give convective air flow forwardly through the furnace at a speed not less than the speed of movement of the article or other means are provided for causing such an air flow or flow of other oxygen-containing gas. An induction furnace is described having a rotating tube and automatic temperature control means.
Claims15
A furnace for the production of .beta.-alumina ceramic articles comprising an open-ended tube with heating means for heating the tube and means for moving the articles continuously through the tube at a uniform rate and having means for inducing oxygen-containing gas to flow through the tube in the direction of movement of the articles.
A furnace for the production of .beta.-alumina ceramic articles comprising an open-ended tube, a susceptor block having a bore through which said open-ended tube passes, an induction coil around said susceptor block, a second tube through said susceptor block, means for moving the ceramic articles continuously through said open-ended tube at a uniform rate, means for inducing oxygen-containing gas to flow through said open-ended tube in the direction of movement of the articles, and a radiation pyrometer for observing a test element within said second tube.
A furnace for the production of .beta.-alumina ceramic articles comprising a susceptor block, an open-ended tube extending through said susceptor block, an induction coil around said susceptor block, means for rotating said open-ended tube about its axis, means for moving the ceramic articles continuously through said open-ended tube at a uniform rate, means for inducing oxygen-containing gas to flow through said open-ended tube in the direction of movement of the articles, a second tube extending into said susceptor block, and means responsive to the temperature of a test element in said second tube.
A furnace for the production of .beta.-alumina ceramic articles comprising an open-ended tube with heating means for heating the tube and means for moving the articles continuously through the tube at a uniform rate and having means for forcing an oxygen-containing gas to flow through the tube in the direction of movement of the articles.
Dependencies are inferred from the claim text.