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Low temperature chlorination of Nd$$_{2}$$O$$_{3}$$ by mechanochemical method with CCl$$_{4}$$

CCl$$_{4}$$を用いたメカノケミカル法によるNd$$_{2}$$O$$_{3}$$の低温塩化処理

永井 崇之; 北脇 慎一; 佐藤 修彰*

Nagai, Takayuki; Kitawaki, Shinichi; Sato, Nobuaki*

低温塩化処理技術に関し、遊星ボールミルを用いたメカノケミカル反応により、Nd$$_{2}$$O$$_{3}$$とCCl$$_{4}$$の塩化処理の可能性を検討した。メカノケミカル実験は、ポット材料,ミル時間, CCl$$_{4}$$/Nd$$_{2}$$O$$_{3}$$モル比,回転速度を変えて行った。得られた生成物のX線回折やラマン分光測定の結果、ジルコニア製及びタングステンカーバイド製のポットを用いた場合、室温状態でNd$$_{2}$$O$$_{3}$$からNdOClへの塩化反応が進むことを確認した。ミル時間を延ばすことやボール数を増やすことがNdOClへの塩化処理に効果的であり、遊星ボールミルで処理された粉末に引張応力が残留することを明らかにした。

For a chlorinating method at low temperature, the possibility of chlorination of Nd$$_{2}$$O$$_{3}$$ by a mechanochemical reaction with CCl$$_{4}$$ was studied using a planetary ball mill. The mechanochemical experiments were conducted by changing the pot materials, milling time, molar ratio of CCl$$_{4}$$/Nd$$_{2}$$O$$_{3}$$, and revolution speed. As the results of obtained products by X-ray diffractometry and Raman spectroscopy, it was confirmed that the chlorination to NdOCl from Nd$$_{2}$$O$$_{3}$$ with CCl$$_{4}$$ was advanced at room temperature in a zirconia or tungsten pot with balls. We found that an extension of the milling time and an increase of the number of ball were effective to the chlorination to NdOCl and that tensile stress remained in the milled powder by using a planetary ball mill.

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