TY - JOUR
T1 - Thermal conductivities of alkali–silicate and calcium–alkali–silicate melts
AU - Nishi, Tsuyoshi
AU - Ohnuma, Katsuya
AU - Tanaka, Kento
AU - Manako, Takumi
AU - Yamato, Yoshifumi
AU - Ohta, Hiromichi
AU - Sukenaga, Sohei
AU - Shibata, Hiroyuki
AU - Kakihara, Toshiaki
N1 - Funding Information:
This work was carried out as a part of the basic research programs of vitrification technology for waste volume reduction supported by the Ministry of Economy, Trade and Industry, Japan. The authors (T.N. and H.O.) are grateful for the financial support of the Cooperative Research Program of “Network Joint Research Center for Materials and Devices” of the Institute of Multidisciplinary Research for Advanced Materials, Tohoku University . We appreciate the support of Y. Kuroda of Ricoh Co., Ltd., and H. Sato and T. Uno of PASONA Co. Ltd. This work was supported in part by a Grant-in-Aid for Scientific Research (B) (KAKENHI) from the Japan Society for the Promotion of Science [Grant No. 16H04543 ].
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - Thermal conductivities of alkali–silicate (R 2 O–SiO 2 (R = Li, Na, K)) and calcium–alkali–silicate (CaO–R 2 O–SiO 2 (R = Li, Na, K)) melts were evaluated by combining their thermal effusivities measured using the front-heating front-detection laser flash method with their density and specific heat capacity. Results of the evaluation revealed that the temperature-dependences of the thermal conductivities of the R 2 O–SiO 2 and CaO–R 2 O–SiO 2 (R = Li, Na, K) melts are small over the temperature range investigated. Moreover, the thermal conductivities of the CaO–R 2 O–SiO 2 melts are almost equal to those of the R 2 O–SiO 2 melts. Therefore, the network frame of the CaO–R 2 O–SiO 2 melts can presumably become dense owing to the ion bonding between Ca 2+ and the non-bridging oxygen.
AB - Thermal conductivities of alkali–silicate (R 2 O–SiO 2 (R = Li, Na, K)) and calcium–alkali–silicate (CaO–R 2 O–SiO 2 (R = Li, Na, K)) melts were evaluated by combining their thermal effusivities measured using the front-heating front-detection laser flash method with their density and specific heat capacity. Results of the evaluation revealed that the temperature-dependences of the thermal conductivities of the R 2 O–SiO 2 and CaO–R 2 O–SiO 2 (R = Li, Na, K) melts are small over the temperature range investigated. Moreover, the thermal conductivities of the CaO–R 2 O–SiO 2 melts are almost equal to those of the R 2 O–SiO 2 melts. Therefore, the network frame of the CaO–R 2 O–SiO 2 melts can presumably become dense owing to the ion bonding between Ca 2+ and the non-bridging oxygen.
KW - Alkali silicate
KW - Calcium alkali silicate
KW - Front-heating front-detection laser flash method
KW - Thermal conductivity
KW - Thermal effusivity
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U2 - 10.1016/j.jnoncrysol.2019.01.038
DO - 10.1016/j.jnoncrysol.2019.01.038
M3 - Article
AN - SCOPUS:85061631987
VL - 511
SP - 36
EP - 40
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
ER -