Growth and Breakage of Needle Calcium Sulfate Dihydrate Crystals
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- TOYOKURA Ken
- Department of Applied Chemistry, School of Science and Engineering, Waseda University
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- AKAISHI Shinichi
- Department of Applied Chemistry, School of Science and Engineering, Waseda University
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- SASE Kiyoshi
- Department of Applied Chemistry, School of Science and Engineering, Waseda University
Bibliographic Information
- Other Title
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- 硫酸カルシウム二水塩針状結晶の成長と破砕
Description
Needle calcium sulfate dihydrate crystals were added into a supersaturated solution obtained from reaction between two aquous solutions of calcium chloride and ammonium sulfate, and were suspended by agitation. Size distributions of suspended crystals were observed every one or two hours.<BR>The average size of latitudinal length of large crystals increased with operating period. From the data the rate of increase of the average size was calculated and was correlated with the supersaturation. But the size distribution of longitudinal length was scarcely changed through these operations of 9 hours. The total number of suspended large seed crystals was constant through operating period, but many fine crystals came out. The average size of the fine crystals suspended with large crystals increased or decreased with operational period. Then within the operational conditions of these tests, needle crystals suspended in a solution were considered to be broken on the edge of them.<BR>On the other hands, the average size of latitudinal and longitudinal length of fine crystals without large crystals, increased until critical size of breakage.
Journal
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- Gypsum & Lime
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Gypsum & Lime 1990 (226), 127-134, 1990
The Society of Inorganic Materials, Japan
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Details 詳細情報について
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- CRID
- 1390001205389101568
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- NII Article ID
- 130003820870
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- ISSN
- 21854351
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed
