Process for the rapid sintering of ceramic components and a kiln

Details Process for the rapid sintering of ceramic components and a kiln Process for the rapid sintering of ceramic components and a kiln

1980-08-26

1982-09-21

Parrish, John A.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

252 6256, 264 66, C04B 3528, C04B 3536

Patent

active

043506518

ABSTRACT:
A process for rapidly sintering ceramic components, in particular of the type utilized in electronics (ferrites), which reduces the sintering time by a factor of from ten to one hundred, reducing the volume of the kiln and resulting in a considerable saving in electric power. In this process the unbaked components previously shaped by pressing with a binder are sintered without carrying out the prior heat treatment of elimination of the binder. The sintering is made according an accurate curve of temperature as concerns the slopes of the rising and descending parts of the curve. The maximum of the curve exceeds by from 100.degree. C. to 300.degree. C. the normal temperature of sintering in the conventional method. The kiln, which is of the passage type with a conveyer belt sliding on rods of alumina, has six heating zones regulated by a thermocouple and a feedback loop pertaining to each zone so as to achieve a heating profile with a high accuracy.

REFERENCES:
patent: 3036009 (1962-05-01), Zerbes

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