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題名 | 熟石膏粉中摻入添加劑對其製作石膏模性質影響之研究=A Study of the Additives to Plaster of Paris for Making Plaster Mold |
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作者 | 盧志昌; 韓雄文; Lu, C. C.; Han, H. W.; |
期刊 | 聯合學報 |
出版日期 | 19990100 |
卷期 | 16 1999.01[民88.01] |
頁次 | 頁159-166 |
分類號 | 464.99 |
語文 | chi |
關鍵詞 | 熟石膏; 石膏模; 石膏凝結時間; 石膏混水量; 凝結膨脹率; 結固終了時間; Plaster of paris; CaSO[feb2].0.5H[feaf]O; Plaster mold; Consistency; Linear setting expansion; Time of final set; |
中文摘要 | 陶瓷注漿成形所使用之石膏模具,其操作性能的優劣,取決於熟石膏粉性質,在 熟石膏粉中摻入添加劑應可強化石膏模具。本研究添加 5%、10%、15% 的輕質碳酸鈣、重質 碳酸鈣及白水泥取代熟石膏粉,在 63%、68%、73%、78% 四種石膏混水量,以同樣的攪拌速 度,調成石膏漿,進行石膏凝結特性之研究,如:結固終了時間、凝結膨脹率、抗折強度、 總吸水率與吸水速率。實驗結果發現添加 5% 輕╱重質碳酸鈣會使石膏模的抗折強度增加, 添加輕╱重質碳酸鈣會使吸水速度變快,及添加白水泥會使石膏模具凝結膨脹率減小,而強 度的增加及吸水速度變快,可減少石膏模使用時的脫模時間及延長石膏模的使用壽命;凝結 膨脹率的降低,可防止石膏模具成形時發生變形。 |
英文摘要 | The plaster mold is important for the slip casting process in ceramics, and its property is decided by the plaster of paris. It is possible that adding the additives to plaster of paris can improve the mold of plaster. This study have been chosen three kinds of additives such as: light calcite, heavy calcite and white cement, with the weight ratio 5, 10, 15%, instead of plaster of paris for making plaster molds under four kinds of plaster consistency: 63, 68, 73 and 78% with the same mixing speed. We analyze the property of mold such as: the time of final set, the linear setting expansion, bending strength, absorption rate and absorption speed, for being a well mold. The experimental results reveal that the bending strength of mold is increased by 5% calcite additives, and the absorption speed become fast with calcite additives increasing, also the linear setting expansion of mold is reduced with cement additives increasing. The separate speed of mold becomes fast and the life of mold becomes long for the slip casting process by the increasing absorption speed and bending strength. At the same time, the white cement additives can avoid deforming of mold by reducing the linear setting expansion. |
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