スルファミン酸を用いた均質沈殿法による硫酸ストロンチウム沈殿粒子の結晶成長(第2報)静置反応の場合

概要

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The crystal growth of the strontium sulfate precipitate particles were examined by using the similar apparatus used on the previous paper. Strontium sulfate particles were precipited through the static reaction of the precipitation from homogeneous solution (PFHS) method on the reaction times (0.5～6.0 h and 24.0 h) by using strontium nitrate (16.7 X 10-3M) and sulfamic acid aqueous solution (16.7 X 10-3 ～ 83.5 X 10-3M) at 100℃.　On the static reaction, thin layer plate of lozenge crystal of below 1Oμm grew slowly to the rectangular solid crystal particles of 20～50μm with the passage of reaction times.　 And then, these particles grew from the thick rectangular solid crystals have steric plane which had wide surface of about 50 X 60 ～ 50 X 100μm to the isomorphous crystal particles of about l00 X 150μm ～ 100 X 200μm with progressed of the precipitation reaction. Further, these crystal particles were much larger than the crystal particles of about lOOμm obtained by the stirring reaction of previous paper in the major axis and the volume of crystal particles. Besides, they were the single crystals and had smooth surfaces. And, the morphology of these crystal particles were holded stable form not change in spite of the aging of l.O month at room temperature.
山形大学の論文
1997-01-31