Thermal conductivity of Na2O-B2O3-SiO2 melts

被引:3
作者
Nishi, Tsuyoshi [1 ]
Manako, Takumi [1 ]
Ohnuma, Katsuya [1 ]
Ohta, Hiromichi [1 ]
Sukenaga, Sohei [2 ]
Shibata, Hiroyuki [2 ]
Oniki, Toshiro [3 ]
机构
[1] Ibaraki Univ, Grad Sch Sci & Engn, 4-12-1 Nakanarusawa Cho, Hitachi, Ibaraki 3168511, Japan
[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi, Japan
[3] IHI Corp 1, Nucl Energy Business Unit, Tokyo, Kanagawa, Japan
基金
日本学术振兴会;
关键词
Thermal effusivity; Na2O-B2O3-SiO2; melt; front-heating-front-detection laser-flash (FH-FDLF) method; thermal conductivity; network model;
D O I
10.1080/00223131.2019.1617206
中图分类号
TL [原子能技术]; O571 [原子核物理学];
学科分类号
0827 ; 082701 ;
摘要
Borosilicate glasses are candidate materials for the immobilization of high-level radioactive waste. The values of thermal conductivity of different borosilicate melts are thus indispensable information when optimizing the temperature distribution in a glass melting furnace. In this study, the thermal effusivity of Na2O-B2O3-SiO2 melts was measured using a front heating-front detection laser-flash method. The thermal conductivity, which can be obtained by combining the measured thermal effusivity with the specific heat capacity and density, was calculated using the least-squares method; the values for the Na2O-B2O3-SiO2 melts either slightly decreased linearly with increasing temperature or remained almost constant over the investigated temperature range. The values of thermal conductivity of the Na2O-B2O3-SiO2 melts were higher than those of B2O3-SiO2 melts and lower than those of CaO-B2O3-SiO2 melts. Furthermore, the thermal conductivity of the Na2O-B2O3-SiO2 melts was compared with those of the B2O3-SiO2 and CaO-B2O3-SiO2 samples.
引用
收藏
页码:710 / 715
页数:6
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