著者

植田 和利 伊東 和彦 上原 誠一郎 佐藤 博樹

出版者

一般社団法人 日本科学教育学会

雑誌

科学教育研究 (ISSN:03864553)

巻号頁・発行日

vol.40, no.1, pp.39-45, 2016 (Released:2016-04-05)

参考文献数

7

被引用文献数

1

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We produced a pure Si substance directly from a SiO2-Mg system using the solar furnace in the air. After the reagent of SiO2-Mg system was melting for 2–3 minutes under the solar furnace, Si grains (~1–3 mm) surrounded by forsterite (Mg2SiO4) were produced as the reaction product. From the phase diagram of MgO-SiO2 system, it is considered that the reaction, 2 SiO2 + 2 Mg → Si + Mg2SiO4, occurred. In this reaction, the existence of Mg2SiO4 melt might have protected Si reduced from SiO2 against O2 in the air, and might have made Si grain grow larger in the melt. In the reduction of SiO2 by Mg, we could have obtained Si grains visible to the naked eye within a few minutes under the solar furnace. Being a simple and short experiment this experiment is suitable for science students.

著者

植田 和利 伊東 和彦 上原 誠一郎 佐藤 博樹

出版者

一般社団法人 日本科学教育学会

雑誌

科学教育研究 (ISSN:03864553)

巻号頁・発行日

vol.40, no.1, pp.39-45, 2016

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We produced a pure Si substance directly from a SiO₂-Mg system using the solar furnace in the air. After the reagent of SiO₂-Mg system was melting for 2–3 minutes under the solar furnace, Si grains (~1–3 mm) surrounded by forsterite (Mg₂SiO₄) were produced as the reaction product. From the phase diagram of MgO-SiO₂ system, it is considered that the reaction, 2 SiO₂ + 2 Mg → Si + Mg₂SiO₄, occurred. In this reaction, the existence of Mg₂SiO₄ melt might have protected Si reduced from SiO₂ against O₂ in the air, and might have made Si grain grow larger in the melt. In the reduction of SiO₂ by Mg, we could have obtained Si grains visible to the naked eye within a few minutes under the solar furnace. Being a simple and short experiment this experiment is suitable for science students.

著者

植田 和利 伊東 和彦 上原 誠一郎 宮崎 一博 佐藤 博樹

出版者

公益社団法人 日本化学会

雑誌

化学と教育 (ISSN:03862151)

巻号頁・発行日

vol.61, no.12, pp.610-611, 2013