オキシビスリチウム

解説Li2O(29.88)．リチウムの炭酸塩，水酸化物，硝酸塩を水素気流中で800 ℃ に加熱して得られる．白色の多孔性粉末．融点1570 ℃．密度2.013 g cm－3．空気中で水や二酸化炭素を吸収する．水に溶けて水酸化リチウムを生じる．導電性ガラス，電池，固体電解質の製造に用いられる．[CAS 12057-24-8]森北出版「化学辞典（第2版）

使用Lithium oxide is a strong alkali that absorbs carbon dioxide and water from the atmosphere. It is used in manufacturing ceramics and special types of glass.

一般的な説明Lithium oxide is a white crystalline solid. Its a strong base. It reacts with water and forms lithium hydroxide.

使用用途酸化リチウムの主な使用用途は、導電性ガラス、電池、固体電解質の製造などです。釉薬にも用いられ、銅と混合して青色に、コバルトと混合してピンクを出すのに用いられています。 熱遮蔽コーティング (Thermal barrier coating; TBCs) においては非破壊的発光分光分析検査や劣化の評価に用いられる場合があります。また、ジルコニアコーティングにおいては、酸化イットリウムと共にドーピング剤として用いられる物質です。

製造方法Industrial and laboratory preparations. Only small volumes of material are prepared industrially. Both industrial and laboratory preparations require the thermal decomposition of lithium peroxide or of lithium hydroxide. Lithium peroxide, Li202 , is converted to lithium oxide, Li20, and oxygen by heating to 450° in a stream of helium gas. Thermal dehydration of lithium hydroxide is carried out at 675°C±10° under vacuum in a nickel container lined with silver foil. Lithium carbonate may be converted to lithium oxide and carbon dioxide by heating the material to 700°C under vacuum in a platinum boat. Industrial uses. There are no current industrial uses which consume large quantities of lithium oxide. Lithium oxide reacts with water as it dissolves to form a solution of lithium hydroxide. Lithium oxide is a strong base and reacts typically with acidic gases and liquids to form lithium salts. At elevated temperatures, lithium oxide also reacts with many solid nonmetal oxides (Si02, B2O3, etc.) and metal oxides (A1203 , Fe2C>3, etc.). High-temperature reactions are the basis for the fluxing action of lithium oxide, lithium hydroxide and lithium carbonate. Care must be taken to avoid the reaction of lithium oxide with reaction vessels at high temperatures.