Abstract
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.
Original language | English |
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Pages (from-to) | 36-40 |
Number of pages | 5 |
Journal | Journal of Non-Crystalline Solids |
Volume | 511 |
DOIs | |
Publication status | Published - 2019 May 1 |
Keywords
- Alkali silicate
- Calcium alkali silicate
- Front-heating front-detection laser flash method
- Thermal conductivity
- Thermal effusivity
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry