| 摘要 |
<p>A heat exchange tube consisting of a sintered body having a porosity of 2-60%, and a heat exchange tube having a surface layer consisting of a composite material of ceramics and metal; specifically, when a heat-resistant alloy tube is used as a base and a surface layer is formed of a composite material of ceramics and metal, such structures are preferable; that the outer surface of the heat-resistant alloy tube is non-bondingly covered with a composite material of ceramics and metal, with the heat-resistant alloy tube contacting the composite material at at least part of their boundary; or that the outer surface of the heat-resistant alloy tube is sequentially covered non-bondingly with a thermal expansion buffer material and a composite material of ceramics and metal, with the alloy tube contacting the thermal expansion buffer material and/or the thermal expansion buffer material contacting the composite material at at least part of their boundaries. The heat exchange tube ensures a stable heat recovery over an extended time even in a high-temperature, corrosive environment such as combustion exhaust gas of industrial wastes.</p> |
