書誌事項
- タイトル別名
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- Development of Thermochromic Teaching Materials Consisting of Cobalt (II) Chloride Hexahydrate and Solid Alcohol
- エンカ コバルト ・ 6 スイワブツ ト コタイ アルコール コンゴウケイ シオン キョウザイ ノ カイハツ
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A new reversible thermochromic system applicable to teaching materials is introduced. In the reaction system consisting of cobalt(II) chloride hexahydrate and solid alcohol, a pink coloration of the mixture due to CoCl_2・6H_2O at room temperature is changed to a blue one, which seems to be due to anhydrous CoCl_2, at the same time as solid alcohol melts upon heating. Thus, the temperature at which the color change takes place can be controlled arbitrarily to a certain extent by selecting solid alcohol appropriately. Using this reaction, teachers and pupils can readily prepare a 'thermo-sheet' by mixing two commercial reagents and laminating the powder obtained. The explanation that alcohol molecules dehydrate the dispersed CoCl_2-6H_2O particles into melt alcohol above the melting point may be conceivable for the mechanism of thermochromism.
収録刊行物
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- 科学教育研究
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科学教育研究 36 (3), 269-272, 2012
一般社団法人 日本科学教育学会
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詳細情報 詳細情報について
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- CRID
- 1390001205751767680
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- NII論文ID
- 110009517862
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- NII書誌ID
- AN00036978
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- ISSN
- 21885338
- 03864553
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- NDL書誌ID
- 024021888
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可