TY - JOUR
T1 - Structure and physicochemical properties of CaO-P2O5-Nb2O5-Na2O glasses
AU - Maeda, Hirotaka
AU - Lee, Sungho
AU - Miyajima, Tomohiro
AU - Obata, Akiko
AU - Ueda, Kyosuke
AU - Narushima, Takayuki
AU - Kasuga, Toshihiro
N1 - Funding Information:
This work was partially supported by a grant from Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (A, B) (Nos. 26289238 , 25249094 and 22360299 ) and the Institute of Ceramics Research and Education (ICRE), Nagoya Institute of Technology.
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2016/1/15
Y1 - 2016/1/15
N2 - Calcium phosphate glasses were prepared by adding Nb2O5 and Na2O. Spectroscopic analyses showed that the glasses included niobate groups, such as NbO4 and NbO6. The amount of NbO4 units, which was considered to be a network former, increased with the increase in Nb2O5 content, and the formation of an Nb-O-P bond appeared. The ion-releasing ability of the glasses in the Tris-buffer solution depended on their chemical composition. The process window of the glass, which was estimated from the temperature range between the glass transition and the onset of crystallization, increased with the increase of the Nb2O5 content of the glass. The excellent chemical durability and glass-forming ability of calcium phosphate glass were considered to originate from the formation of the Nb-O-P bond.
AB - Calcium phosphate glasses were prepared by adding Nb2O5 and Na2O. Spectroscopic analyses showed that the glasses included niobate groups, such as NbO4 and NbO6. The amount of NbO4 units, which was considered to be a network former, increased with the increase in Nb2O5 content, and the formation of an Nb-O-P bond appeared. The ion-releasing ability of the glasses in the Tris-buffer solution depended on their chemical composition. The process window of the glass, which was estimated from the temperature range between the glass transition and the onset of crystallization, increased with the increase of the Nb2O5 content of the glass. The excellent chemical durability and glass-forming ability of calcium phosphate glass were considered to originate from the formation of the Nb-O-P bond.
KW - Calcium phosphate glass
KW - Chemical durability
KW - Glass structure
KW - Niobium ion
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U2 - 10.1016/j.jnoncrysol.2015.06.003
DO - 10.1016/j.jnoncrysol.2015.06.003
M3 - Article
AN - SCOPUS:84948111246
SN - 0022-3093
VL - 432
SP - 60
EP - 64
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
ER -