材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
NbNの自己燃焼合成と超伝導特性
佐原 哲也平尾 喜代司宮本 欽生小泉 光恵
著者情報
ジャーナル フリー

1988 年 37 巻 412 号 p. 55-59

詳細
抄録

An investigation has been made on the synthesis of superconducting NbN and (Nb, Mo)N powders by a combustion reaction of nitriding their metal elements under high nitrogen pressures up to 10MPa. Nearly stoichiometric B1-NbN powders were prepared by the combustion reaction of Nb powders with a proper amount of NbN addition under 1-10MPa nitrogen pressures. The characteristics of this combustion reaction were investigated by measuring the propagating velocity of combustion for the packed reactants with various amounts of diluent. The superconducting transition temperature of NbN powders obtained was 16.9K, which is very close to the highest value of 17.3K reported for NbN up to now. On the other hand, Nb powders with 5, 10, and 20wt% Mo were burned under 10MPa nitrogen pressure in order to synthesize (Nb, Mo)N solid solutions. The combustion product of Nb with 5wt% Mo consisted of B1 phase only, while those with 10 and 20wt% Mo contained a small amount of residual Mo. The transition temperatures in the Nb-Mo-N system were 12.7-15.9K, which were lower than that of pure NbN obtained in this study.

著者関連情報
© 日本材料学会
前の記事 次の記事
feedback
Top