| 摘要 |
PROBLEM TO BE SOLVED: To satisfactorily heat a raw material nitrogen gas in an Na-Ga flux method. SOLUTION: An openable and closable double-airtight vessel comprising a reaction vessel 100 and an outer vessel 200, both of which are adaptable to high-temperature high-pressure conditions, is used. The reaction vessel 100 is heated by heating units 31a, 31b and 31c that are placed inside the outer vessel. A nitrogen feed pipe 10 and an exhaust pipe 11 are connected to the reaction vessel 100, and feeding and exhaust of nitrogen are performed while adjusting the pressure inside the reaction vessel 100 to e.g. 100 atm by a control device, not illustrated. Here, when the nitrogen fed from the nitrogen feed pipe 10 passes through a heated part 10a that spirally proceeds around the periphery of the reaction vessel 100, it passes through it slowly enough to be heated to a temperature comparable to that of the reaction vessel 100 by the heating units 31a, 31b and 31c. This enables sufficient heating of the nitrogen before it is fed to the Na/Ga flux surface inside the reaction vessel 100. COPYRIGHT: (C)2008,JPO&INPIT |
