Effect of phyllosilicate type on the microstructure and properties of kaolin-based ceramic tape

Waltraud Kriven , Jingyang Wang (1) , Yanchun Zhou , Dongming Zhu , Gustavo Costa (2) , Manabu Fukushima , Andrew Gyekenyesi

1 High-Performance Ceramic Division
2 CRCT - Centre de Recherches en Cancérologie de Toulouse

This chapter examines the effective influence of the nature and shape of clay minerals on the texture, sintering behavior and the final characteristics of kaolin-based ceramics shaped by tape casting. The structure of palygorskite contains ribbons of 2:1 (TOT) layer-type phyllosilicates linked by periodic inversion of the apical oxygen of the continuous tetrahedral sheet for every four atoms of Si. Mechanical properties of individual tapes can be significantly increased by introducing a slight proportion of long aluminosilicate fibers. The purpose of this work was to highlight the effective influence of the nature and shape of clay minerals on the texture, sintering behavior and the final characteristics of kaolin-based ceramics tapes. A blade laminates the suspension and determines the thickness of the green suspension. A shear-thinning rheological behavior is necessary to favor the even spreading of the suspension while avoiding sedimentation of particles. Fractures of tapes were set vertically on carbon paste to observe slices. Silver lacquer was evently applied on samples surfaces. Dilatometric analyses were performed using a horizontal Netsch 202 C which detected in situ the length variation of samples in the same conditions as for DTA-TGA analyses.

Domaines: Matériaux; Matériaux

Waltraud Kriven, Jingyang Wang, Yanchun Zhou, Dongming Zhu, Gustavo Costa, et al.. Effect of phyllosilicate type on the microstructure and properties of kaolin-based ceramic tape. Ceramic Engineering and Science Proceedings, 2017, Ceramic Engineering and Science Proceedings, 37 (7), pp.47-60. ⟨10.1002/9781119321811.ch5⟩. ⟨hal-01905932⟩