烧成工艺制度对钒尾矿基泡沫陶瓷性能的影响

采用商洛钒尾矿、钾长石和粘土为原料制备泡沫陶瓷,在确定原料配方的基础上,研究烧结温度、升温速率和保温时间对泡沫陶瓷体积密度和抗压强度的影响,确定最优烧成工艺参数,制得质量轻、强度高、导热系数低的高性能泡沫陶瓷材料.结果表明:8℃/min从室温至1000℃,再以3℃/min的升温速度烧至1135 ℃保温30 min,在此烧成工艺条件下制备的泡沫陶瓷试样的体积密度为420 kg/m3,抗压强度为3.1 MPa,导热系数为0.09 W/(m· K).

Effect of Sintering Process System on Properties of Foam Ceramics from Vanadium Tailings

Shangluo vanadium tailings,potassium feldspar and clay as raw materials were used to make foam ceramics.After determination of the materials formula,the effects of sintering temperature,heating rate and soaking time on the bulk density and compressive strength of foam ceramics were investigated.The high-performance foam ceramics with light weight,high strength and low thermal conductivity were prepared at the optimal firing process.The results show that the optimal firing process is 8 ℃/min to 1000 ℃ from room temperature,and then 3 ℃/min to 1135 ℃ for 30 min.The bulk density,the compressive strength,and the thermal coefficient of the foam ceramics prepared at the optimal firing process is 420 kg/m3,3.1 MPa and 0.09 W/(m · K),respectively.