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首页> 外文期刊>Wood and Fiber Science >THERMAL DEGRADATION AND THERMAL CONDUCTIVITY OF GYPSUM-CEMENT PARTICLEBOARD
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THERMAL DEGRADATION AND THERMAL CONDUCTIVITY OF GYPSUM-CEMENT PARTICLEBOARD

机译：石膏-水泥刨花板的热降解和热导率

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Thermal degradation of boards made from wood particles mixed with gypsum and gypsum-cement was determined in air and nitrogen by thermogravimetric analysis. The pure constituents of the boards (wood particles, gypsum, and Portland cement) were characterized separately. The thermal conductivity of the boards was determined using a heat flowmeter apparatus. Commercial gypsum board was used as a control for all the tests performed. Commercial gypsum board, pure gypsum, pure Portland cement, and gypsum-cement mixture showed mass losses between 18 and 22% at 800° C. Conversely, the wood particles were very sensitive to heat in the presence of air. In general, gypsum-cement particle-board exhibited better resistance to thermal degradation than gypsum particleboard, but it has the highest thermal conductivity as a result of its higher density. Thermal conductivity was shown to be strongly dependent on board density.
机译：通过热重分析在空气和氮气中确定了由混合有石膏和石膏水泥的木屑制成的木板的热降解。木板的纯净成分（木材颗粒，石膏和波特兰水泥）分别进行了表征。使用热流量计设备确定板的导热率。商业石膏板被用作所有进行的测试的对照。商业石膏板，纯石膏，纯波特兰水泥和石膏-水泥混合物在800°C下的质量损失为18％至22％。相反，木材颗粒在有空气的情况下对热非常敏感。通常，石膏-水泥刨花板显示出比石膏刨花板更好的抗热降解性，但是由于其密度较高，因此具有最高的导热率。结果表明，导热率在很大程度上取决于板的密度。

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