华南理工大学学报(自然科学版) ›› 2005, Vol. 33 ›› Issue (6): 74-78.

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用酯化淀粉实现氧化铝陶瓷的原位凝固成型

陈玲1 宋贤良2 叶建东3 李晓玺1   

  1. 1.华南理工大学 轻化工研究所,广东 广州 510640;2.华南农业大学 食品学院,广东 广州 510642;3.华南理工大学 材料科学与工程学院,广东 广州 510640
  • 收稿日期:2004-11-25 出版日期:2005-06-25 发布日期:2005-06-25
  • 通信作者: 陈玲(1961-),女,硕士,副研究员,主要从事碳水化合物化学与技术方面的研究。 E-mail:felchen@scut.edu.cn
  • 作者简介:陈玲(1961-),女,硕士,副研究员,主要从事碳水化合物化学与技术方面的研究。
  • 基金资助:

    武器装备预研基金资助项目(51412020401JW1601)

Consolidation in-situ Forming of Aluminium Oxide Ceramic by Acetate Starch

Chen Ling1  Song Xian-liang2  Ye Jian-dong3  Li Xiao-xi1   

  1. 1.Research Institute of Light Industry& Chemical Engineering,South China Univ,of Tech.,Guangzhou 510640,Guangdong.China;2.College of Food Science,South China Agricultural Univ.,Guangzhou 51064 2,Guangdong,China;3.College of Materials Science and Engineering,South China Univ.ofTech.,Guangzhou 51064 0,(,uangdong,China
  • Received:2004-11-25 Online:2005-06-25 Published:2005-06-25
  • Contact: 陈玲(1961-),女,硕士,副研究员,主要从事碳水化合物化学与技术方面的研究。 E-mail:felchen@scut.edu.cn
  • About author:陈玲(1961-),女,硕士,副研究员,主要从事碳水化合物化学与技术方面的研究。
  • Supported by:

    武器装备预研基金资助项目(51412020401JW1601)

摘要: 为获得以淀粉作凝固剂原位凝固成型氧化铝高性能陶瓷的方法,文中探讨了酯化淀粉添加量对陶瓷浆料流变特性以及成型出的素坯的线收缩、密度、千坯强度和显微结构的影响.结果表明:酯化淀粉添加量在0.5% ~1.5%(质量分数)范围内时,淀粉一氧化铝陶瓷浆料的表观粘度随酯化淀粉添加量的增加而上升,但均小于1Pa·S:素坯的密度和平均线收缩率随淀粉添加量的增加而减小;千坯强度随淀粉添加量的增加而增强.实验中获得了致密、均匀的坯体.利用淀粉受热吸水溶胀和糊化的性质以及糊化后淀粉糊的凝胶化特性可实现Al2O3 陶瓷浆料的近净尺寸原位凝固成型、

关键词: 酯化淀粉, 氧化铝, 陶瓷浆料, 原位凝固成型

Abstract:

A new consolidation in-situ forming process for high-perform ance aluminium oxide ceramic using starch as the consolidator/binder was investigated.The effects of different contents of acetate starch on the rheologicl be-haviour of the ceramic slip,as well as the linear shrinkage,density,strength and microstructure of the green body were discussed.The results indicate that,when the content of acetate starch is 0.5% ~1.5% (mass fraction).the apparent viscosity of alumina slurry,which is always less than 1 Pa·s,increases with the content.Moreover,with the increase in starch content,the linear shrinkage rate and the density of the dried body decrease. while the strength of the dried body almost linearly increases.Green body with homogeneously-distributed density and pore size was also obtained in this research. It is concluded that Al2O3ceramics can be consolidation in-situ formed.based on the gelling network of therm ally swelled and gelatinized acetate starch.

Key words: acetate starch, aluminium oxide, ceramic slip, consolidation in-situ forming