晶化温度对钨尾矿微晶玻璃析晶性能的影响

发布时间：2018-06-09 12:14

  本文选题：微晶玻璃 + 熔融法　； 参考：《中国陶瓷》2017年11期

【摘要】：以广东韶关梅子钨尾矿和相应化学试剂为原料,通过熔融法制备了硅灰石为主晶相,钙长石为次晶相的微晶玻璃。采用差热扫描(DSC)、X射线衍射(XRD)、扫描电子显微镜(SEM)等手段研究了晶化温度对微晶玻璃样品的析晶性能、微观结构的影响,测试了样品的耐酸耐碱性、密度、抗弯强度、显微硬度等性能。结果表明:随着晶化温度的升高,微晶玻璃样品中晶粒逐渐长大,由球型晶体发育成杆状晶体;在850~1050℃热处理的微晶玻璃,其密度、抗弯强度和显微硬度都随着晶化温度的升高逐渐增加,950℃时微晶玻璃性能最优,耐酸性为0.19%、耐碱性为0.18%、密度达2.82g/cm~3、抗弯强度达97.52 MPa、显微硬度达527 MPa,1000℃时,微晶玻璃的性能不同程度的降低可能是因为晶相转变或晶相分布造成不致密结构引起的。
[Abstract]:The glass-ceramics with wollastonite as the main crystalline phase and calcium feldspar as the secondary crystal phase were prepared by melting method from Guangdong Shaoguan Meizi tungsten tailings and corresponding chemical reagents. The effects of crystallization temperature on crystallization properties and microstructure of glass-ceramics were studied by means of differential thermal scanning X-ray diffraction (DSC-X) and scanning electron microscopy (SEM). The acid and alkali resistance, density and bending strength of the samples were tested. Microhardness and other properties. The results show that with the increase of crystallization temperature, the grains in the glass-ceramics gradually grow up and grow from spherical crystals to rod-like crystals, and the density of the glass-ceramics treated at 850 ~ 1050 鈩，

本文编号：1999690