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: SHIBATA HIROYUKI 東北大学, 多元物質科学研究所, 教授 (50250824)
• 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
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000); Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2012: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2011: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
• Keywords: 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

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.

Research Products

• [Journal Article] Thermal Conductivity of Molten Silicate of Al_2O_3-CaO-Na_2O-SiO_2 Measured by Means of a Front Heating-Front Detection Laser Flash Method (2012)
  • Author(s): Hiroki Hasegawa, Takaya Kowatari, Yasuhiro Shiroki, Hiroyuki Shibata, Hiromichi Ohta, Yoshio Waseda
  • Journal Title: Metallurgical and Materials Transactions B Volume: 43(6) Pages: 1413-1419
  • Peer Reviewed
• [Journal Article] Thermal Conductivity Measurements of Some Synthetic Al_2O_3-CaO-SiO_2 Slags by Means of a Front-Heating and Front-Detection Laser-Flash Method (2012)
  • Author(s): Hiroki Hasegawa, Yasuhiro Hoshino, Takeshi Kasamoto, Yuuki Akaida, Takaya,Kowatari, Yasuhiro Shiroki, Hiroyuki Shibata, Hiromichi Ohta, Yoshio Waseda
  • Journal Title: Metallurgical and Materials Transactions B Volume: 43(6) Pages: 1405-1412
  • Peer Reviewed
• [Journal Article] Recent Development in the Investigation on Thermal Conductivity of Silicate Melts High Temperature Materials and Processes (2012)
  • Author(s): Hiroki Hasegawa, Hiromichi Ohta, Hiroyuki Shibata, Yoshio Waseda
  • Volume: 31(4-5)
  • Pages: 491-499
  • Peer Reviewed
• [Journal Article] Recent Development in the Investigation on Thermal Conductivity of Silicate Melts (2012)
  • Author(s): Hiroki Hasegawa
  • Journal Title: High Temperature Materials and Processes Volume: 31 Pages: 491-499
  • Peer Reviewed
• [Journal Article] Thermal Conductivity Measurements of Some Synthetic Al2O3-CaO-SiO2 Slags by Means of a Front-Heating and Front-Detection Laser-Flash Method (2012)
  • Author(s): Hiroki Hasegawa
  • Journal Title: Metallurgical and Materials Transactions B Volume: 43 Pages: 1405-1412
  • Peer Reviewed
• [Journal Article] Thermal Conductivity of Molten Silicate of Al2O3-CaO-Na2O-SiO2 Measured by Means of a Front Heating-Front Detection Laser Flash Method (2012)
  • Author(s): Hiroki Hasegawa
  • Journal Title: Metallurgical and Materials Transactions B Volume: 43 Pages: 1413-1419
  • Peer Reviewed
• [Presentation] ケイ酸塩融体の熱伝導率の等方複相モデルによる解析 (2014)
  • Author(s): 太田弘道, 猪瀬司, 小嶋純平, 柴田浩幸,助永壮平
  • Organizer: 日本鉄鋼協会 第167回春季講演大会
  • Place of Presentation: 東京
• [Presentation] ケイ酸塩融体の熱伝導率の等方複層モデルによる解析 (2014)
  • Author(s): 太田弘道、猪瀬司、小嶋純平、柴田浩幸、助永壮平
  • Organizer: 日本鉄鋼協会第167回春季講演大会
  • Place of Presentation: 東京
• [Presentation] CaO-K2O-SiO2 融体の熱伝導率 (2013)
  • Author(s): 小嶋 純平, 長谷川 裕樹, 白木 康裕, 猪瀬 司, 柴田 浩幸, 助永 壮平, 太田 弘道
  • Organizer: 第34回日本熱物性シンポジウム
  • Place of Presentation: 富山市
• [Presentation] Thermal Conductivity of Molten CaO-Na_2O-SiO_2 Silicates (2013)
  • Author(s): Hiroyuki SHIBATA, Hiromichi OHTA, Takaya KOWATARI, Hiroki HASEGAWA, Souhei SUKENAGA
  • Organizer: The 10th Asian Thermophysical Properties Conference
  • Place of Presentation: KOREA, Jeju
• [Presentation] Thermal Conductivity of Silicate Melts Containing CaF_2 at High Temperature (2013)
  • Author(s): Hiroyuki SHIBATA, Hiromichi OHTA
  • Organizer: The 3rd International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining
  • Place of Presentation: Finland and Sweden
• [Presentation] Analysis for Thermal Conductivity of Silicate Melts by 3D Metwork Structure Model (2013)
  • Author(s): Hiromichi OHTA, Hiroyuki SHIBATA
  • Organizer: The 3rd International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining
  • Place of Presentation: Finland and Sweden
• [Presentation] Analysis for Thermal Conductivity of Silicate Melts by 3D Ｎetwork Structure Model (2013)
  • Author(s): Hiromichi OHTA, Hiroyuki SHIBATA
  • Organizer: The 3rd International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining
  • Place of Presentation: Finland, Espoo & Sweden, Bro
• [Presentation] Thermal Conductivity of Silicate Melts Containing CaF2 at High Temperature (2013)
  • Author(s): Hiroyuki SHIBATA, Hiromichi OHTA
  • Organizer: The 3rd International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining
  • Place of Presentation: Finland, Espoo & Sweden, Bro
• [Presentation] Thermal conductivity of molten silicates (2013)
  • Author(s): Hiroyuki SHIBATA
  • Organizer: The 9th Korea-Japan Workshop on Science and Technology in Ironmaking and Steelmaking
  • Place of Presentation: Japan, Kussharo
• [Presentation] Thermal Conductivity of Molten CaO-Na2O-SiO2 Silicates (2013)
  • Author(s): Hiroyuki SHIBATA, Hiromichi OHTA, Takaya KOWATARI, Hiroki HASEGAWA, Souhei SUKENAGA
  • Organizer: The 10th Asian Thermophysical Properties Conference
  • Place of Presentation: KOREA, Jeju
• [Presentation] Effect of K2O Addition on the Viscosity of CaO-SiO2-Al2O3 Melts (2013)
  • Author(s): Sohei SUKENAGA, Tomoyuki HIGO, Hiroyuki SHIBATA, Noritaka SAITO, Kunihiko NAKASHIMA
  • Organizer: Goldschmidt2013
  • Place of Presentation: Ｉｔａｌｙ， Ｆｌｏｒｅｎｃｅ
• [Presentation] CaO-K2O-SiO2融体の熱伝導率 (2013)
  • Author(s): 小嶋 純平, 長谷川 裕樹, 白木 康裕, 猪瀬 司, 柴田 浩幸, 助永 壮平, 太田 弘道
  • Organizer: 第34回 日本熱物性シンポジウム
  • Place of Presentation: 富山市
• [Presentation] ケイ酸塩融体の熱伝導率の擬クリストバライトモデルによる解析 (2013)
  • Author(s): 太田弘道
  • Organizer: 日本鉄鋼協会 第165回春季公園大会
  • Place of Presentation: 東京
• [Presentation] R-Na_2O-SiO_2(R=Al_2O_3,CaO)融体の熱伝導率とNBO/Tの関係 (2012)
  • Author(s): 古渡貴也, 長谷川裕樹, 白木康弘, 太田弘道, 柴田浩幸
  • Organizer: 日本鉄鋼協会第163回春季講演大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-03-30
• [Presentation] 硼珪酸塩融体の熱浸透率測定 (2012)
  • Author(s): 白木康裕
  • Organizer: 第33回日本熱物性シンポジウム
  • Place of Presentation: 大阪
• [Presentation] Thermal conductivity of molten silicate measured by means of a front heating-front detection laser flash method (2012)
  • Author(s): Hiroyuki SHIBATA
  • Organizer: 5th feench-japanese joint workshop on FRONTIER MATERIALS
  • Place of Presentation: France,Rennes
• [Presentation] Thermal conductivity of molten silicate measured by means of a novel lalser flash method
  • Author(s): Hiroyuki SHIBATA
  • Organizer: The 3rd Symposium of the Research Center for Sustainable Science & Engineering
  • Place of Presentation: 仙台