烧结时间对含铅玻璃制备微晶玻璃析晶及性能的影响

以铅玻璃与粉煤灰为原料，通过协同熔炼制备了微晶玻璃。通过XRD和SEM等手段研究了不同烧结时间下微晶玻璃的物相组成及显微结构，测定了微晶玻璃的密度、吸水率、维氏硬度和化学抗性。结果表明: 延长烧结时间对含铅玻璃加入量为40%(FG40)、50%(FG50)样品的晶相类型和晶化程度有影响，而对含铅玻璃加入量为60%(FG60)、70%(FG70)和80%(FG80)样品的影响较小。随着烧结时间延长，样品晶化程度提高，晶体长大，玻璃相减少。适宜的含铅玻璃加入量为50%~70%，对应的FG50、FG60、FG70样品最佳烧结时间分别为4 h、3 h、3 h。

Effect of Sintering Time on Crystalallization and Properties of Glass Ceramics Synthesized with Waste Lead Glass

With lead glass and coal fly ash as raw materials, glass ceramics can be synthesized by collaborative smelting. The phase compositions and microstructure of the glass ceramics obtained by using different sintering time were studied with X-ray diffraction and scanning electron microscopy. Also the density, water absorption, Vicker-hardness and chemical resistance of the glass ceramics were all detected. Results show that prolonging the sintering time can bring some impact to the type of crystal phase and degree of crystallization of the samples with the addition of lead glass at an amount of 40% (FG40) and 50% (FG50), but shows insignificant effect on samples with the addition of lead glass at an amount of 60%(FG60), 70%(FG70) and 80%(FG80). It is found that as the sintering time prolongs, the degree of crystallization of the sample increases, indicating that the crystal grows and the glass phase decreases. It is concluded that the addition of lead glass shall be appropriately within the range of 50%~70%, and the corresponding FG50, FG60 and FG70 samples shall be optimally sintered for 4 h, 3 h and 3 h, respectively.