Thermal conductivity of Na2O-B2O3-SiO2 melts

被引：4

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

来源：

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY | 2019年 / 56卷 / 08期

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

页码：710 / 715

页数：6