Effect of composition and sintering process on mechanical properties of glass ceramics from solid waste. (2nd January 2016)

• Record Type: Journal Article
• Authors: Lu, X.; Li, Y.; Dai, W.; Cang, D.
• Is Part Of: Advances in applied ceramics. Volume 115:Number 1(2016)
• Page Start: 13
• Page End: 20
• Publication Date: 2016-01-02
• Subjects: Waste -- Sintering -- Diopside -- Glass ceramics -- Mechanical properties; Ceramics -- Periodicals; 620.1405
• DOI: Http://www.tandfonline.com/doi/10.1179/1743676115Y.0000000045
• Languages: English
• ISSNs: 1743-6753

Abstract

Abstract : Sintered diopside glass ceramics were successfully prepared from mixtures of blast furnace slag, fly ash and mining tailing. Results showed that sample C2 with relatively low iron oxides and mass ratio of CaO/SiO2 possessed the highest bending strength value among samples. A low content of iron oxide enhanced densification degree because pores were developed by reduction of ferric oxide into ferrous oxide. Moreover, a low CaO/SiO2 mass ratio also greatly promoted the densification process by prolonging the sintering time and delaying the crystallisation. In addition, sample C1 developed by one-stage sintering had a worse mechanical performance than that obtained by two-stage sintering although they had the same crystals. For all samples, despite of different compositions and sintering processes, the main crystal phases are augite and diopside ferrian.