成果報告書詳細
管理番号20100000001546
タイトル*平成21年度中間年報 マルチセラミックス膜新断熱材料の開発
公開日2011/1/8
報告書年度2009 - 2009
委託先名財団法人ファインセラミックスセンター
プロジェクト番号P07006
部署名ナノテクノロジー・材料技術開発部
和文要約和文要約等以下本編抜粋:1.研究開発の内容及び成果等
本プロジェクトは、住宅・ビル、電気機器、輸送機器、加熱炉などの断熱壁や断熱窓などに広く適用できる画期的な断熱材料技術を開発するため、ナノ多孔体構造を有する複数のセラミックス膜・素材を用いて、熱移動を支配する三要素である「格子振動」、「対流」、「輻射」のすべてを抑制するマルチセラミックス膜新断熱材料の開発基盤技術を開発することを目的とする。
研究開発項目(1)多孔質セラミックス粒子合成技術の開発
(1)-1 多孔質セラミックス粒子の合成
水ガラスを出発原料とした化学プロセスによって多孔質セラミックス粒子を合成し、気孔率が85%以上、圧縮強度が20MPa 以上、熱伝導率が0.002W/mK 以下(1Pa 以上雰囲気下)を達成した。粒子表面制御装置および粒子乾燥処理装置によって、多孔質セラミックス粒子の低熱伝導率化への表面制御および乾燥処理の寄与を検討し、さらに低熱伝導率を得るための多孔質セラミックス粒子の構造制御指針を得た。
(1)-2 多孔質セラミックス粒子の特性評価
ナノ多孔構造や気孔率等を変化させた種々の多孔質セラミックス粒子について、熱伝導率-真空度依存性の関係曲線を詳しく調べ、それら成果を化学プロセスにフィードバックさせ、圧縮強度20MPa 以上、熱伝導率0.002 W/mK 以下(1Pa 以上雰囲気下)、気孔率85%以上のセラミックス粒子を合成し、本プロセスを最適化することができた。
英文要約Title:Development of Multiceramic Film for New Thermal Insulators (FY2007-FY2011)FY2009 Annual Report
In order to realize wall materials and window materials that exhibit much improved thermal insulation performance and bring about a considerable energy-saving effect in air conditioning of houses and buildings, home appliances, transportation equipment and energy storage, this project will develop multiceramics that suppress any type of heat transfer, such as lattice vibration, convection, and radiation, and also develop technology for compounding polymer and glass. The research will be carried out by dividing the target technologies into common basic technologies and technologies for practical use using nanotechnology and materials technology.
1. Development of porous ceramic particle synthesis technologies
To develop multiceramic film that suppresses any of the three elements of heat transfer (lattice vibration, convection and radiation), it is first necessary to develop technology for synthesizing ceramic particles having a nanoporous structure. We have developed porous ceramic particles that have well-controlled porosity, excellent compression strength and low thermal conductivity. Further, we will develop porous ceramic particles having a low thermal conductivity and high compression strength suitable for the development of high heat insulating wall material.
2. Development of nanostructure ceramic film coating technology
The second step necessary for developing multiceramic film is development of technology for coating ceramic film having a nanostructure. Nanostructure ceramic film has unique nanoporous structure, such as a columnar or feather-like structure, and therefore, it can be expected to suppress all of the three elements of heat conduction. We have developed a nanostructure
ceramic film that have well controlled porosity, columnar and feather-like structures, excellent compression strength and a high reflectance. Further, we will develop a transparent nanostructure ceramic film having high reflectance and excellent compression strength suitable for the development of super heat insulating wall material and super heat insulating window material.
3. Development of technology for synthesizing transparent porous ceramics
The third step necessary for the material development of the multi-ceramics film is development of technology for synthesizing transparent porous ceramics. Transparent porous ceramics can be most suitable for the material for super heat insulating window, because it can be expected to have the compatibility of transparency (visible line) and the effect of suppressing the heat conduction by the lattice vibration and convection due to a porous fractal structure on the nano order. We have developed transparent porous ceramics that control porosity and pore diameter, have excellent compression strength, and have a low thermal conductivity. Further, we will develop transparent porous ceramics having a low thermal conductivity and high compression strength suitable for the development of super heat insulating window material.
4. Development of compounding technology and vacuum segmentation technology
We will develop technology for compounding and evacuating the three elemental materials described above, that is, porous ceramic particles, nanostructure ceramic film and transparent porous ceramics using polymer or glass. Further, we will establish compounding, evacuation and segmentation technologies for the development of super high heat insulating material for walls and windows.
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