Fabrication of microporous calcite block from calcium hydroxide compact under carbon dioxide atmosphere at high temperature

Akihiro Otsu, Kanji Tsuru, Michito Maruta, Melvin L. Munar, Shigeki Matsuya, Kunio Ishikawa

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Effects of carbonation temperature and compacting pressure on basic properties of calcite block were studied using Ca(OH) 2 compact made with 0.2-2.0 MPa and their carbonation at 200-800°C for 1 h. Microporous calcite was obtained only when carbonated at 600°C using Ca(OH) 2 compact made with 0.2 MPa even though thermogravimetry analysis showed that calcite powder was stable up to 920°C under CO2 atmosphere. CaO formed by carbonation at 700°C and 800°C is thought to be caused by the limited CO2 diffusion interior to the Ca(OH) 2 compact. Also, unreacted Ca(OH) 2 was found for Ca(OH) 2 compact prepared with 0.5 MPa or higher pressure even when carbonated at 600°C. As a result of high temperature carbonation, crystallite size of the calcite, 58.0 nm, was significantly larger when compared to that of calcite prepared at room temperature, 35.5 nm. Porosity and diametral tensile strength of the microporous calcite were 39.5% and 6.4 MPa.

Original languageEnglish
Pages (from-to)593-600
Number of pages8
Journaldental materials journal
Volume31
Issue number4
DOIs
Publication statusPublished - Aug 13 2012

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Calcium Hydroxide
Hydrated lime
Calcium Carbonate
Calcite
Atmosphere
Carbon Dioxide
Carbon dioxide
Carbonation
Fabrication
Temperature
Thermogravimetry
Pressure
Tensile Strength
Porosity
Crystallite size
Powders
Thermogravimetric analysis
Tensile strength

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Dentistry(all)

Cite this

Fabrication of microporous calcite block from calcium hydroxide compact under carbon dioxide atmosphere at high temperature. / Otsu, Akihiro; Tsuru, Kanji; Maruta, Michito; Munar, Melvin L.; Matsuya, Shigeki; Ishikawa, Kunio.

In: dental materials journal, Vol. 31, No. 4, 13.08.2012, p. 593-600.

Research output: Contribution to journalArticle

Otsu, Akihiro ; Tsuru, Kanji ; Maruta, Michito ; Munar, Melvin L. ; Matsuya, Shigeki ; Ishikawa, Kunio. / Fabrication of microporous calcite block from calcium hydroxide compact under carbon dioxide atmosphere at high temperature. In: dental materials journal. 2012 ; Vol. 31, No. 4. pp. 593-600.
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