Method of manufacturing white furnace boats for firing ceramic a

Details Method of manufacturing white furnace boats for firing ceramic a Method of manufacturing white furnace boats for firing ceramic a

1974-05-02

1976-05-25

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 68, C04B 3518, C04B 3510

Patent

active

039590020

ABSTRACT:
A method for manufacturing white furnace boats which are used for firing ceramic articles at temperatures up to about 1700.degree. C. The furnace boat is made from a mixture of between 45% and 55% of synthetic corundum having a particle size of between 1 and 2 mm, between 25% and 35% of synthetic corundum having a particle size of between 0.1 and 0.2 mm, between 5% and 20% of kaolin having a particle size of 99% under 0.06 mm and 0.1% over 0.06 mm, and between 5% and 10% of quartz having a particle size of between 0.1 and 2 mm. The product white furnace boats are .alpha.-Al.sub.2 O.sub.3 in the amount of 60% to 70%, mullite in the amount of 20% to 30%, and a glass phase together with some cristobalite in the amount of 5% to 10%.

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patent: 3625721 (1971-12-01), Snyder et al.
patent: 3640739 (1972-04-01), Bakker
patent: 3652307 (1972-03-01), Bakker

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