TY - GEN
T1 - Calcite bone substitute prepared from calcium hydroxide compact using heat-treatment under carbon dioxide atmosphere
AU - Tsuru, Kanji
AU - Otsu, Akihiro
AU - Maruta, Michito
AU - Valanezhad, Alireza
AU - Kawachi, Giichiro
AU - Takeuchi, Akari
AU - Matsuya, Shigeki
AU - Ishikawa, Kunio
PY - 2012/1/1
Y1 - 2012/1/1
N2 - The purpose of this study is to investigate whether calcite blocks with high mechanical property could be obtained for a short period from calcium hydroxide (Ca(OH)2) compact using heat-treatment under carbon dioxide (CO2) atmosphere. The Ca(OH)2 disks compacted with different pressure was heated at different temperature ranging from 200°C to 800°C for an hour under CO2 atmosphere. From the X-ray diffractometry, Ca(OH)2 converted into calcite along with the rise of the heating temperature. Small amount of unreacted Ca(OH)2 remained in samples heated at 600°C whereas samples treated at 800°C converted to calcite with very small amount of calcium oxide. The diametral tensile strength (DTS) value increased with the rise of heating temperature up to 600°C then decreased down to 800°C. Meanwhile, the porosity decreased with the rise of heating temperature up to 600°C then slightly increased up to 800°C. From the scanning electron microscope observation, grains grew bigger along with the rise of heating temperature. Intergranular space between grains decreased from 200°C to 600°C. The highest DTS value (14 MPa±1.3) at 600°C could be the result of lesser intergranular space due to sintering.
AB - The purpose of this study is to investigate whether calcite blocks with high mechanical property could be obtained for a short period from calcium hydroxide (Ca(OH)2) compact using heat-treatment under carbon dioxide (CO2) atmosphere. The Ca(OH)2 disks compacted with different pressure was heated at different temperature ranging from 200°C to 800°C for an hour under CO2 atmosphere. From the X-ray diffractometry, Ca(OH)2 converted into calcite along with the rise of the heating temperature. Small amount of unreacted Ca(OH)2 remained in samples heated at 600°C whereas samples treated at 800°C converted to calcite with very small amount of calcium oxide. The diametral tensile strength (DTS) value increased with the rise of heating temperature up to 600°C then decreased down to 800°C. Meanwhile, the porosity decreased with the rise of heating temperature up to 600°C then slightly increased up to 800°C. From the scanning electron microscope observation, grains grew bigger along with the rise of heating temperature. Intergranular space between grains decreased from 200°C to 600°C. The highest DTS value (14 MPa±1.3) at 600°C could be the result of lesser intergranular space due to sintering.
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UR - http://www.scopus.com/inward/citedby.url?scp=81555215980&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.493-494.166
DO - 10.4028/www.scientific.net/KEM.493-494.166
M3 - Conference contribution
AN - SCOPUS:81555215980
SN - 9783037852552
T3 - Key Engineering Materials
SP - 166
EP - 169
BT - Bioceramics 23
T2 - 23rd Symposium and Annual Meeting of International Society for Ceramics in Medicine, ISCM 2011
Y2 - 6 November 2011 through 9 November 2011
ER -