Improved aluminum oxide fiber plate and preparation method thereof

The invention discloses an improved aluminum oxide fiber plate product, which is characterized in that on the basis of the existing fiber plate preparation process, basic silicon sol is used as an inorganic bonding agent to prepare a low-density and high-intensity fiber plate. Meanwhile, near infrared light-screening agents such as rutile type titanium dioxide or potassium hexatitanate whiskers are added into the fiber plate; the high-temperature heat conductivity is further reduced; the room temperature pressure-resistant intensity of the prepared aluminum oxide fiber plate is 4.5 to 5.6 MPa;when the thickness of the sample is 1cm, in the stable state, the hot surface temperature is 1000 DEG C; the cold surface temperature is 300 to 320 DEG C; the hot surface temperature is 1200 DEG C; the cold surface temperature is 340 to 360 DEG C. 本发明公开了种改进的氧化铝纤维板制品，其特征是，在已有的纤维板制备工艺基础上，采用碱性硅溶胶作为无机粘结剂，制得低密度、高强度纤维板。同时在纤维板中掺杂近红外遮光剂如金红石型钛白粉或六钛酸钾晶须，进步降低其高温热导率。制得的氧化铝纤维板其室温抗压强度为4.5~5.6MPa，样品尺寸为1cm厚时，稳态时，热面温度1000℃，冷面温度为300~320℃，