This phenomenon occurs when refractories soften and deform when heated under pressure, and is one of the important properties of refractories. Refractoriness indicates the softening temperature when only its own weight is applied, but in actual kilns where refractories are used, they are under load. Since the softening and deformation under load varies greatly depending on the type and properties of the refractory, in order to understand its properties, refractories are usually heated under a load of 2 kgf/cm2 and the state of softening and deformation is tested. When this load-softening test is performed, the curve shown in the figure is obtained. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
耐火物が加圧下で熱せられるときに軟化変形する現象で,耐火物の重要な性質の一つである。耐火度は自重のみがかかった状態での軟化温度を示すものであるが,実際に耐火物が使用される窯炉においては,荷重がかけられた状態にある。荷重下での軟化変形は,耐火物の種類・性質などによって大きく変化するので,その性質を知るために,ふつう2kgf/cm2の荷重をかけて加熱し,軟化変形の状態を試験する。この荷重軟化試験をすると図のような曲線が得られる。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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