Fabrication of calcite blocks from gypsum blocks by compositional transformation based on dissolution–precipitation reactions in sodium carbonate solution

Kunio Ishikawa, Giichiro Kawachi, Kanji Tsuru, Ayami Yoshimoto

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)389-393
Number of pages5
JournalMaterials Science and Engineering C
Volume72
DOIs
Publication statusPublished - Mar 1 2017

Fingerprint

sodium carbonates
Calcium Sulfate
gypsum
Calcium Carbonate
Calcite
Gypsum
calcite
Carbonates
Sodium
Fabrication
fabrication
Bone Substitutes
bones
Bone
substitutes
calcium carbonates
Apatite
Calcium carbonate
apatites
Polymorphism

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Fabrication of calcite blocks from gypsum blocks by compositional transformation based on dissolution–precipitation reactions in sodium carbonate solution. / Ishikawa, Kunio; Kawachi, Giichiro; Tsuru, Kanji; Yoshimoto, Ayami.

In: Materials Science and Engineering C, Vol. 72, 01.03.2017, p. 389-393.

Research output: Contribution to journalArticle

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