臭素-メタノール溶解による合成窒化物の挙動について

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タイトル別名
  • Behavior of a few synthesized nitrides
  • シュウソ-メタノール ヨウカイ ニ ヨル ゴウセイ チッカブツ ノ キョドウ ニ ツイテ

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説明

Beeghly's method for the determination of aluminum nitride in steel consists of, first, determining experimentally the soluble nitrogen in the ester-halogen treated residue, and secondly, calculating the aluminum equivalent to that nitrogen without any experimental estimation. This method has a tendency to lead to erroneous results, because some of the other nitrides coexisting in the sample behave just like aluminum nitride all through the procedure.<BR>In order to clarify whether this suspicion is reasonable or not, the author synthesized nitrides of some elements ordinarily found in plain carbon steel such as iron, manganese, silicon, and chromium, as well as aluminum, and compared the behavior of these synthesized nitrides, treating them with such halogenated solvents as methanolic bromine (stirred at room temperature and 60°C) and methanolic iodine (stirred at room temperature and 60°C) as well as ester halogen (at boiling temperature).<BR>The results of these treatments showed that iron nitrides do not interfere because they are dissolved in ester halogen and methanolic bromine; and that the interference by nitrides of manganese is not so great; but that nitrides of chromium, especially the one in the formula of Cr2N, interfere nearly 100 per cent, as can be seen in the column in Table III. Although nitrides of silicon seem to interfere little, the samples here synthesized are likely to be solid solutions of nitrogen with silicon, as can be seen in Table II, and not nitrides of silicon with a fixed formula such as SiN, Si2N3, or Si3N4; hence the behavior of nitrides of silicon can not be ascertained from this experiment. Moreover, it is interesting to observe from the same table that the so-called insoluble nitrogen in these synthesized nitrides is apt to be directly dissolved with these halogenated solvents or, at least, to become feasibly soluble with dilute acid after being treated with them.

収録刊行物

  • 分析化学

    分析化学 8 (10), 639-646, 1959

    公益社団法人 日本分析化学会

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