Relationship between thermal conductivity and network structure of molten silicates

熔融硅酸盐导热系数与网络结构的关系

• 批准号: 23360332
• 负责人: SHIBATA HIROYUKI
• 金额: $ 12.23万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23360332/
• 关键词: 珪酸塩融体; 熱伝導率; ネットワーク構造; 珪酸塩; 非架橋酸素; NMR; レーザーフラッシュ法; ネートワーク構造; 温度依存性; 組成依存性

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.

使用前加热检测激光闪光法研究了添加K2O，Na2O，Caf2和Al2O3对熔融硅酸盐导热率的影响。熔融硅酸盐的热导电性显示液体区域的温度依赖性不大。测得的热导率值随着NBO/T的增加（非桥接氧离子/四面体配位阳离子）的增加而降低。在三个维度上建模了硅酸盐融化的网络结构，以估计硅酸盐融化对通过硅酸盐网络链的导热传导的脱耦行为的影响。获得硅酸盐熔体3D电导率的导热率的影响获得了硅酸盐熔体的3D电导率。可获得逐渐增长的硅酸盐电导率值。这种趋势与测得的热导率有关。

项目成果

Thermal Conductivity Measurements of Some Synthetic Al2O3-CaO-SiO2 Slags by Means of a Front-Heating and Front-Detection Laser-Flash Method

• DOI: 10.1007/s11663-012-9702-y
• 发表时间: 2012-08
• 期刊: Metallurgical and Materials Transactions B
• 作者: H. Hasegawa;Yasuhiro Hoshino;Takeshi Kasamoto;Yu Akaida;Takaya Kowatari;Yasuhiro Shiroki;H. Shibata;H. Ohta;Y. Waseda

Analysis for Thermal Conductivity of Silicate Melts by 3D Ｎetwork Structure Model

利用 3D 网络结构模型分析硅酸盐熔体的导热系数

• 发表时间: 2013
• 作者: Hiromichi OHTA;Hiroyuki SHIBATA
• 通讯作者: Hiroyuki SHIBATA

Thermal Conductivity of Molten Silicate of Al2O3-CaO-Na2O-SiO2 Measured by Means of a Front Heating-Front Detection Laser Flash Method

• DOI: 10.1007/s11663-012-9745-0
• 发表时间: 2012-10
• 期刊: Metallurgical and Materials Transactions B
• 作者: H. Hasegawa;Takaya Kowatari;Yasuhiro Shiroki;H. Shibata;H. Ohta;Y. Waseda

Thermal conductivity of molten silicate measured by means of a front heating-front detection laser flash method

前加热-前检测激光闪光法测定熔融硅酸盐的热导率

• 发表时间: 2012
• 作者: Yuichi Setsuhara;Yasufumi OhchiKen Cho;Kosuke Takenaka;Akinori Ebe;Hiroyuki SHIBATA
• 通讯作者: Hiroyuki SHIBATA

ケイ酸塩融体の熱伝導率の等方複層モデルによる解析

使用各向同性多层模型分析硅酸盐熔体的导热系数

• 发表时间: 2014
• 作者: 太田弘道;猪瀬司;小嶋純平;柴田浩幸;助永壮平
• 通讯作者: 助永壮平