Method for producing ceramic long body
AssigneeNGK Insulators, Ltd.
InventorToshihiro Yoshida
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Abstract
A method for producing a ceramic long body has the steps of: hanging a ceramic non-sintered body having a long shape inside a sheath so that said ceramic non-sintered body does not touch the sheath; firing the ceramic body at a temperature at which the ceramic body sinters until the sintering is completed to obtain a sintered ceramic body; hanging the sintered ceramic body upside down; and firing the sintered ceramic body again at a temperature at which the ceramic body sinters. The method gives a ceramic long body having little deformation, and the present invention can be suitably employed as a method for producing, for example, a heat transmitting tube a heat exchanger of a shell-and-tube type.
Claims3
A method of producing a ceramic long body comprising:
- hanging a long, non-sintered ceramic body in a first substantially vertical direction inside a sheath while maintaining a spacing between the non-sintered ceramic body and the sheath;
- firing the hanging ceramic body at a sufficient temperature and for a sufficient time to sinter the ceramic body completely;
- hanging the sintered ceramic body in a second substantially vertical direction substantially opposite to said first vertical direction;
- and
- firing the hanging sintered ceramic body at least at said sufficient temperature.
Dependencies are inferred from the claim text.