A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HEAT-RESISTANT MEMBER
To provide a heat-resistant member with a higher total emissivity and a smaller temperature dependence of the total emissivity compared to a conventional heat resistant member.SOLUTION: A heat-resistant member of the present invention includes a base material made of isotropic graphite and an ultra-porous.high emissivity layer formed on all or part of the surface of the base material. However, the term "ultra-porous.high emissivity layer" refers to a layer with a porosity of 60% or more and a total emissivity of 60% or more at 25°C. The ultra-porous.high emissivity layer has a total emissivity change rate ΔεT (=(εT2500-εT25)/εT25) of 0.6 or less. Note that εT2500 is the total emissivity of the ultra-porous.high emissivity layer at 2500°C and εT25 is the total emissivity of the ultra-porous.high emissivity layer at 25°C. The heat-resistant member may further be provided with a dense or porous layer formed in all or in part at the interface between the base material and the ultra-porous.high emissivity layer. However, the term "porous layer" refers to a layer with a porosity of 10% or more to less than 60%, and the term "dense layer" refers to a layer with a porosity of less than 10%.SELECTED DRAWING: Figure 7
【課題】従来の耐熱部材に比べて全放射率が高く、全放射率の温度依存性が小さい耐熱部材を提供すること。【解決手段】耐熱部材は、等方性黒鉛からなる基材と、基材の表面の全部又は一部に形成された超多孔質・高放射率層とを備えている。但し、「超多孔質・高放射率層」とは、空隙率が６０％以上であり、かつ、２５℃における全放射率が６０％以上である層をいう。超多孔質・高放射率層は、全放射率変化率ΔεT（＝(εT2500－εT25)／εT25）が０．６以下である。但し、εT2500は、２５００℃における超多孔質・高放射率層の全放射率、εT25は、２５℃における超多孔質・高放射率層の全放射率。耐熱部材は、基材と超多孔質・高放射率層の間の界面の全部又は一部に形成れた、緻密層又は多孔質層をさらに備えていても良い。但し、「多孔質層」とは、空隙率が１０％以上６０％未満である層をいい、「緻密層」とは、空隙率が１０％未満である層をいう。【選択図】図７
HEAT-RESISTANT MEMBER
To provide a heat-resistant member with a higher total emissivity and a smaller temperature dependence of the total emissivity compared to a conventional heat resistant member.SOLUTION: A heat-resistant member of the present invention includes a base material made of isotropic graphite and an ultra-porous.high emissivity layer formed on all or part of the surface of the base material. However, the term "ultra-porous.high emissivity layer" refers to a layer with a porosity of 60% or more and a total emissivity of 60% or more at 25°C. The ultra-porous.high emissivity layer has a total emissivity change rate ΔεT (=(εT2500-εT25)/εT25) of 0.6 or less. Note that εT2500 is the total emissivity of the ultra-porous.high emissivity layer at 2500°C and εT25 is the total emissivity of the ultra-porous.high emissivity layer at 25°C. The heat-resistant member may further be provided with a dense or porous layer formed in all or in part at the interface between the base material and the ultra-porous.high emissivity layer. However, the term "porous layer" refers to a layer with a porosity of 10% or more to less than 60%, and the term "dense layer" refers to a layer with a porosity of less than 10%.SELECTED DRAWING: Figure 7
【課題】従来の耐熱部材に比べて全放射率が高く、全放射率の温度依存性が小さい耐熱部材を提供すること。【解決手段】耐熱部材は、等方性黒鉛からなる基材と、基材の表面の全部又は一部に形成された超多孔質・高放射率層とを備えている。但し、「超多孔質・高放射率層」とは、空隙率が６０％以上であり、かつ、２５℃における全放射率が６０％以上である層をいう。超多孔質・高放射率層は、全放射率変化率ΔεT（＝(εT2500－εT25)／εT25）が０．６以下である。但し、εT2500は、２５００℃における超多孔質・高放射率層の全放射率、εT25は、２５℃における超多孔質・高放射率層の全放射率。耐熱部材は、基材と超多孔質・高放射率層の間の界面の全部又は一部に形成れた、緻密層又は多孔質層をさらに備えていても良い。但し、「多孔質層」とは、空隙率が１０％以上６０％未満である層をいい、「緻密層」とは、空隙率が１０％未満である層をいう。【選択図】図７
HEAT-RESISTANT MEMBER
耐熱部材
SHIMAZU HIROKI (author) / NAKAMURA DAISUKE (author)
2023-10-13
Patent
Electronic Resource
Japanese