| 摘要 |
PURPOSE:To obtain a sintered material free from warpage and undulation without forming a part having defective electrooptical characteristics by alternately laminating pieces of material having electrooptical effect and setters inserted between the pieces and baking the pieces while introducing an atmospheric gas through the setters. CONSTITUTION:An atmospheric gas composed of evaporated PbO and oxygen is introduced through an atmospheric gas introduction pipe 2a and a connection pipe 8a into the cavity 7 of a setter 5. The setter 5 is a porous flat plate having high gas-permeability and heat-resistance. The introduced atmospheric gas is blown off through the small pores of the porous setter 5. The situation is the same in the case of introducing an atmospheric gas through atmospheric gas introducing pipes 2b, 2c... and connection pipes 8b, 8c... to the cavities 7 of other setters 5. The laminated pieces are heated at a prescribed temperature for a prescribed time in a baking furnace to effect the atmospheric baking of the piece. |
