澆注法制作Caβ″—Al<sub>2</sub>O<sub>3</sub>陶瓷管

澆注法制作Caβ″—Al₂O₃陶瓷管

摘要: 本文介紹了首次制成Caβ″—Al₂O₃陶瓷管的方法—粉末注模澆注法的工藝流程以及介質、粉末粒度、溫度等因素對陶瓷管質量的影響。同時給出了陶瓷管的密度,利用伽伐電池測得的電化學性能以及用電化學方法測得的CaO在此電解質中的活度,為Caβ″-Al₂O₃陶瓷管的實際應用提供了基本數據。

Abstract: Caβ"-Al₂O₃ is a fast ion conductor of divalent cation conducting. It can be used to determine the activity of CaO in slag directly and be made a probe for determining the low oxygen in iron. The fabrication of Polycrystalline Caβ"-Al₂O₃ ceramic tube by slip casting are introduced and the effect of medium,Powder size and temperature on the quality of the tube are described too. For the slip casting, methanolic slips and powder molds were used. The high density (97% theoretical density) and heavy textured fired tubes were obtained after sintering for 2 hours at 1670℃.
For checking the electrochemical properties of Caβ"-Al₂O₃ a Galvanic cell to determine the high temperature thermodynamic properties of the. La-O-F system was constructed in this work.
The activities of calcia in. Caβ"-Al₂O₃ at 1113-1333 K were measured by the following cell
Pt|CeO₂ (s), CeF₃ (s),CaF₂ (s), CaO (β") CSZ|O₂ (air)|Pt.