镍渣基泡沫玻璃的制备及其性能研究

以镍渣和废玻璃作为主要原料,使用Na2CO3为发泡剂,采用模具装填法来烧制泡沫玻璃.研究了镍渣的掺量、发泡剂掺量、发泡温度和发泡时间对泡沫玻璃的气孔结构和相关力学性能的影响.研究表明:镍渣掺量减少,Na2CO3掺量增加和发泡温度的升高,均会降低泡沫玻璃的体积密度,提高样品的平均气孔直径;镍渣掺量对泡沫玻璃的组成成分和晶体种类没有明显的影响;以20%镍渣和80%玻璃粉为主料,5%~7%Na2CO3为发泡剂,在发泡温度870 ℃下保温60 min,可以制备出气孔率为85.14%,体积密度为0.3715 g/cm3,抗折强度为2.062 MPa,平均气孔直径在3.13 mm的镍渣基泡沫玻璃.

Preparation and Properties of Nickel Slag Based Foam Glass

Foam glasses were prepared through the mold filling method using nickel slag and waste glass as the main raw material and Na2CO3 as foaming agent.The effects of nickel slag content, foaming agent content, foaming temperature and sintering time length on the structure and mechanical properties of the foam glass were investigated.The experimental results show that a decrease in volume density and an increase in average pore size of foam glasses with a decrease in the content of nickel slags, an increase in Na2CO3 content or an increase in sintering temperature;Composition and crystalline phase type of foam glass were barely affected by change of nickel slag content.The foam glasses exhibited excellent comprehensive properties such as a porosity of 85.14%, an apparent density of 0.3715 g/cm3, a bending strength of 2.062 MPa, and an average pore size of 3.13 mm when using 20% nickel slags and 80% waste glass as main raw materials and 5%-7% Na2CO3 as gas blowing agent at 870 ℃ for 60 min.