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Licensed Unlicensed Requires Authentication Published by De Gruyter March 31, 2013

Synthesis and Properties of Al-δ Layered Sodium Disilicate with High Framework Stability

Synthese und Eigenschaften von Al-δ-Schicht-Natriumdisilikat mit hoher Strukturstabilität
  • J.-X. Dong , L.-P. Li , H. Xu , F. Deng , L. Liu and X. Ai


Al-δ layered sodium disilicate with high framework stability in hot water (60–80°C) has been successfully synthesized from the system of Na2O–Al2O3–SiO2–H2O. It was shown that the presence of aluminum can improve the purity of δ phase. After marinated in hot distilled water for 60minutes, Al-δ layered sodium disilicate still kept δ phase and had better Ca2+ binding capacity and calcium binding rate. This property of Al-δ layered sodium disilicate may extend its application field. The samples were characterized by XRD, FT-IR, MAS NMR, Ca2+ binding capacity and rate, The data of 27Al MAS NMR and 29Si MAS NMR showed that aluminum was incorporated essentially in tetrahedral framework position, and substitute for SiO4 tetrahedron in sheet of δ layered sodium disilicate.


Al-δ-Schicht-Natriumdisilikat mit hoher Strukturstabilität in heißem Wasser (60–80°C) wurde aus einem Na2O–Al2O3–SiO2–H2O-System erfolgreich synthetisiert. Es wurde gezeigt, dass in Gegenwart von Aluminium die Reinheit der δ-Phase verbessert werden kann. Nach einer Behandlung in heißem, destilliertem Wasser über 60 Minuten, behält das Al-δ-Schicht-Natriumdisilikat noch seine δ-Phase und hat eine bessere Ca2+-Bindingskapazität sowie einen besseren Kalziumbindungsgrad. Diese Eigenschaften von Al-δ-Schicht-Natriumdisilikat können dessen Anwendungsbereich erweitern. Die Proben wurden durch XRD, FT-IR, MAS NMR, Ca2+-Bindungskapazität und -Grad charakterisiert. Die Daten von 27Al MAS NMR und 29Si MAS NMR zeigten, dass Aluminium hauptsächlich in Tetraederstrukturstellung inkorporiert und substituiert für SiO4-Tetraeder im Sheet von δ-Schicht-Natriumdisilikat war.

Jin-Xiang Dong, Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, P.R. China, Tel.: 0086-351-6010550-8. E-mail:

Jin-Xiang Dong, a professor of Taiyuan University of Technology, has been studying the application and synthesis of inorganic porous materials for 20 years.

Li-ping Li is reading for Master degree at Taiyuan University of Technology. His research fields centred at character of layered silicate.

Hong Xu, a vice-professor of Taiyuan University of Technology, has been studying the application and synthesis of inorganic materials for 9 years.

Feng Deng, a professor of Wuhan Institute of Physics and Mathematics, has been studying solid state nuclear magnetic resonance and mechanism research for molecular sieves and catalysts.

Lei Liu is an assistant professor of Taiyuan University of Technology, has been studying the synthesis of mesoporous molecular sieves application of surfactant for 5years.

Xuanjun Ai, a doctor worked at Wuhan Institute of Physics and Mathematics. His research fields centred at characterization of solid materials and determination by solid-state NMR.


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Received: 2006-03-02
Published Online: 2013-03-31
Published in Print: 2006-09-01

© 2006, Carl Hanser Publisher, Munich

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