聚乙二醇分子量对凝胶注模氧化锆坯体干燥的影响
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摘要
采用聚乙二醇(PEG)溶液干燥凝胶注模成型的ZrO_2坯体,探讨了不同分子量的PEG溶液对ZrO_2湿坯的干燥速率及干燥后坯体强度的影响。结论表明,坯体采用PEG溶液干燥会在一定程度上影响干燥后生坯强度,但可以防止其变形或开裂,且随着PEG分子量增加,坯体干燥平衡时残余水分降低,收缩率相对增大。使用PEG20000作为液相干燥剂,干燥平衡时坯体失重3.6%,收缩率为2.32%。
Gelcast ZrO_2 green bodies were dried using PEG solution in this work.The effect of PEG solution with different molecular weight on the drying rate of ZrO_2 body and the strength of green body after drying was investigated.The conclusion shows that the body by using PEG solution after drying will affect the body strength to a certain extent,but it can prevent the deformation or cracking.With the increase of molecular weight of PEG,the residual moisture decreases and shrinkage increases when the body was in dry equilibrium.Using PEG20000 as a liquid desiccant,the body loses 3.6% weight and the shrinkage of the body was 2.32% when it was in dry equilibrium.
Gelcast ZrO_2 green bodies were dried using PEG solution in this work.The effect of PEG solution with different molecular weight on the drying rate of ZrO_2 body and the strength of green body after drying was investigated.The conclusion shows that the body by using PEG solution after drying will affect the body strength to a certain extent,but it can prevent the deformation or cracking.With the increase of molecular weight of PEG,the residual moisture decreases and shrinkage increases when the body was in dry equilibrium.Using PEG20000 as a liquid desiccant,the body loses 3.6% weight and the shrinkage of the body was 2.32% when it was in dry equilibrium.
引文
[1]晏伯武.凝胶注模成型工艺的研究[J].中国陶瓷,2006,42(02):8-11.
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[3]Zhang C,Yang J,Qiu T,et al.Preparation of ZTA ceramic by aqueous gelcasting with a low-toxic monomer DMAA[J].Ceramics International,2012,38(4):3063-3068.
[4]黄志彬.陶瓷粉末凝胶注模成型工艺研究[D].长沙:湖南大学,2008.
[5]王金锋,高雅春,谢志鹏,等.聚乙二醇用于注凝成型ZrO2坯体干燥研究[J].人工晶体学报,2007,36(6):1339-1342.
[6]金晓.氧化铝陶瓷凝胶注模成型工艺中固化应力的测试与表征[D].太原:中北大学,2011.
[2]Gilissen R,Erauw J P,Smolders A,et al.Gelcasting,a near net shape technique[J].Materials&Design,2000,21(4):251-257.
[3]Zhang C,Yang J,Qiu T,et al.Preparation of ZTA ceramic by aqueous gelcasting with a low-toxic monomer DMAA[J].Ceramics International,2012,38(4):3063-3068.
[4]黄志彬.陶瓷粉末凝胶注模成型工艺研究[D].长沙:湖南大学,2008.
[5]王金锋,高雅春,谢志鹏,等.聚乙二醇用于注凝成型ZrO2坯体干燥研究[J].人工晶体学报,2007,36(6):1339-1342.
[6]金晓.氧化铝陶瓷凝胶注模成型工艺中固化应力的测试与表征[D].太原:中北大学,2011.