RetroMTA : Synthesis and hydration behavior of calcium zirconium aluminate

 

 

Synthesis and hydration behavior of calcium zirconium aluminate (Ca7ZrAl6O18) cement
Eun-Hee Kang a, Jun-Sang Yoo b, Bo-Hye Kima, Sung-Woo Choi a, Seong-Hyeon Hong a,⁎
a Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 151-744, South Korea
b Department of Oral & Maxillofacial Surgery, School of Dentistry, Seoul National University, Seoul 110-749, South Korea

a r t i c l e i n f o a b s t r a c t
Article history:
Received 26 November 2012
Accepted 14 November 2013

Keywords:
Calcium zirconium aluminate
Calcium aluminate cement (D)
Hydration (A)
Microstructure (B)

Calcium zirconium aluminate (Ca7ZrAl6O18) cements were prepared by solid state reaction and polymeric
precursor methods, and their phase evolution, morphology, and hydration behavior were investigated. In polymeric
precursor method, a nearly single phase Ca7ZrAl6O18 was obtained at relatively lower temperature
(1200 °C) whereas in solid state reaction, a small amount of CaZrO3 coexisted with Ca7ZrAl6O18 even at higher
temperature (1400 °C). Unexpectedly, Ca7ZrAl6O18 synthesized by polymeric precursor process was the largesized
and rough-shaped powder. The planetary ball milling was employed to control the particle size and
shape. The hydration behavior of Ca7ZrAl6O18 was similar to that of Ca3Al2O6 (C3A), but the hydration products
were Ca3Al2O6·6H2O (C3AH6) and several intermediate products. Thus, Zr (or ZrO2) stabilized the intermediate
hydration products of C3A.
© 2013 Elsevier Ltd. All rights reserved.