2013 Fiscal Year Final Research Report
Relationship between thermal conductivity and network structure of molten silicates
| Project/Area Number |
23360332
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Metal making engineering
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
WASEDA Yoshio 東北大学, 多元物質科学研究所, 名誉教授 (00006058)
OHTA Hiromichi 茨城大学, 工学部, 教授 (70168946)
SUKENAGA Souhei 東北大学, 多元物質科学研究所, 助教 (20432859)
|
|---|
| Project Period (FY) |
2011-04-01 – 2014-03-31
|
| Keywords | 珪酸塩融体 / 熱伝導率 / ネットワーク構造 |
|---|
| Research Abstract |
The effect of addition of K2O, Na2O, CaF2 and Al2O3 on thermal conductivity of molten silicate was investigated by using the front heating-front detection laser flash method. The thermal conductivities of molten silicates showed insignificant temperature dependence in liquid region. The measured thermal conductivity values decreases with increasing value of NBO/T(Non-bridging Oxygen ions/Tetrahedrally coordinated cation). The network structure of silicate melts was modeled in three dimensions to estimate the effect of decoupling behavior of silicate melts on thermal conduction through silicate network chains.The effect of amount of non-bridging oxygen on thermal conductivity of the 3D model of silicate melts was obtained.The obtained values of thermal conductivity gradually decreased with increasing NBO/T. This tendency agrees with that for the measured thermal conductivity.
|
