Horvat Barbara, Ducman Vilma
Slovenian National Building and Civil Engineering Institute, Dimičeva ulica 12, Ljubljana 1000, Slovenia.
Materials (Basel). 2019 Oct 30;12(21):3563. doi: 10.3390/ma12213563.
The aim of the paper is to research the influence of foaming and stabilization agents in the alkali activation process of waste green ceramics for future low cost up-cycling into lightweight porous thermal insulating material. Green waste ceramics, which is used in the present article, is a green body residue (non-successful intermediate-product) in the synthesis of technical ceramics for fuses. This residue was alkali activated with Na-water glass and NaOH in theoretically determined ratio based on data from X-ray fluorescence (XRF) and X-ray powder diffraction (XRD) that was set to maximise mechanical properties and to avoid efflorescence. Prepared mixtures were compared to alkali activated material prepared in theoretically less favourable ratios, and tested on the strength and density. Selected mixtures were further foamed with different foaming agents, that are Na-perborate (s), HO (l), and Al (s), and supported by a stabilization agent, i.e., Na-dodecyl sulphate. The goal of the presented work was to prepare alkali activated foam based on green ceramics with density below 1 kg/l and compressive strength above 1 MPa.
本文的目的是研究发泡剂和稳定剂在废弃绿色陶瓷碱激发过程中的影响，以便未来将其低成本升级转化为轻质多孔隔热材料。本文所使用的绿色废弃陶瓷是用于制造熔断器的工业陶瓷合成过程中的生坯残渣（未成功的中间产物）。基于X射线荧光光谱（XRF）和X射线粉末衍射（XRD）数据，按照理论确定的比例，用钠水玻璃和氢氧化钠对该残渣进行碱激发，以最大化机械性能并避免泛霜现象。将制备的混合物与按理论上不太理想的比例制备的碱激发材料进行比较，并对其强度和密度进行测试。选用不同的发泡剂（过硼酸钠（固体）、水（液体）和铝（固体））对选定的混合物进一步发泡，并使用一种稳定剂（即十二烷基硫酸钠）进行辅助。本文工作的目标是制备基于绿色陶瓷的碱激发泡沫材料，其密度低于1 kg/l，抗压强度高于1 MPa。
