TY - JOUR
T1 - Fabrication of calcite blocks from gypsum blocks by compositional transformation based on dissolution–precipitation reactions in sodium carbonate solution
AU - Ishikawa, Kunio
AU - Kawachi, Giichiro
AU - Tsuru, Kanji
AU - Yoshimoto, Ayami
N1 - Funding Information:
This study was supported, in part, by the Strategic Promotion of Innovative Research and Development Program ( 16im0502004h ) from the Japan Agency for Medical Research and Development .
PY - 2017/3/1
Y1 - 2017/3/1
N2 - Calcium carbonate (CaCO3) has been used as a bone substitute, and is a precursor for carbonate apatite, which is also a promising bone substitute. However, limited studies have been reported on the fabrication of artificial calcite blocks. In the present study, cylindrical calcite blocks (ϕ6 × 3 mm) were fabricated by compositional transformation based on dissolution–precipitation reactions using different calcium sulfate blocks as a precursor. In the dissolution–precipitation reactions, both CaSO4·2H2O and CaSO4 transformed into calcite, a polymorph of CaCO3, while maintaining their macroscopic structure when immersed in 1 mol/L Na2CO3 solution at 80 °C for 1 week. The diametral tensile strengths of the calcite blocks formed using CaSO4·2H2O and CaSO4 were 1.0 ± 0.3 and 2.3 ± 0.7 MPa, respectively. The fabrication of calcite blocks using CaSO4·2H2O and CaSO4 proposed in this investigation may be a useful method to produce calcite blocks because of the self-setting ability and high temperature stability of gypsum precursors.
AB - Calcium carbonate (CaCO3) has been used as a bone substitute, and is a precursor for carbonate apatite, which is also a promising bone substitute. However, limited studies have been reported on the fabrication of artificial calcite blocks. In the present study, cylindrical calcite blocks (ϕ6 × 3 mm) were fabricated by compositional transformation based on dissolution–precipitation reactions using different calcium sulfate blocks as a precursor. In the dissolution–precipitation reactions, both CaSO4·2H2O and CaSO4 transformed into calcite, a polymorph of CaCO3, while maintaining their macroscopic structure when immersed in 1 mol/L Na2CO3 solution at 80 °C for 1 week. The diametral tensile strengths of the calcite blocks formed using CaSO4·2H2O and CaSO4 were 1.0 ± 0.3 and 2.3 ± 0.7 MPa, respectively. The fabrication of calcite blocks using CaSO4·2H2O and CaSO4 proposed in this investigation may be a useful method to produce calcite blocks because of the self-setting ability and high temperature stability of gypsum precursors.
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U2 - 10.1016/j.msec.2016.11.093
DO - 10.1016/j.msec.2016.11.093
M3 - Article
C2 - 28024601
AN - SCOPUS:84998704862
VL - 72
SP - 389
EP - 393
JO - Materials Science and Engineering C
JF - Materials Science and Engineering C
SN - 0928-4931
ER -