Effects of Quartz and Zirconium Silicate on the Sintering Property of Magnesia Calcium Materials

In order to improve the sinterability of MgO-CaO system materials. Use light burned dolomite, light burned magnesite as main raw materials, quartz and zirconium silicate as additives to made 2 groups of samples respectively: 1) Quartz is added to mixture including light burned magnesite and dolomite that wt.(MgO) is 65% to make wt.(SiO₂) is 5%, 10%, 15%, 20% respectively; 2) zirconium silicate is added to mixture including light burned magnesite and dolomite that wt.(MgO) is 65% to make wt.(ZrSiO₄) is 5%, 10%, 15%, 20%, 25% respectively. The samples formed sintered respectively in 1550°C, 1600°C, 1650°C, 1700°C for 2 hours to test samples' bulk density, open porosity and microstructure to investigate the effects of additives on the sintering property of magnesia calcium materials. The results showed that: SiO₂ had better not more than 5%; the samples are best when zirconium silicate is 15%.