Sintering of MgO-based refractories with added WO3
Source abstract
Abstract
Abstract The effects of WO 3 on properties of MgO-based refractories were studied and microstructures analyzed using scanning electron microscopy (SEM) and EDS. WO 3 can improve the sintering of MgO-based refractories. 3 is favorable to improve the cold modulus of rupture of MgO-based refractories, but high levels of WO 3 have a negative effect on cold MOR and thermal shock. The low melting phases MgWO 4 and CaWO 4 formed in MgO boundaries result in increased liquid volume. The formation of CaWO 4 leads to C/S ratio change and decreased levels of C 3 S and C 2 S, and the low melting phase CMS forms. Thus, the densification is improved by phase liquid sintering. SEM observation confirms the existence of CaWO 4 and MgWO 4 grain boundary phases.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Magnesium Oxide Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
Show source-provided references
1. A consideration on corrosion of magnesia refractory brick by silicate slag
2. Melt corrosion of oxide and oxide-C refractories10.1179/095066099101528234 ↗
3. Thermochemistry and microstructures of MgO–C refractories containing various antioxidants10.1016/S0955-2219(00)00308-3 ↗
4. Effect of TiO2, SiO2 and Al2O3 on properties of sintered magnesium oxide from seawater10.1016/0254-0584(96)80125-8 ↗
5. Secondary phases in natural magnesite sintered with addition of titania, ilmenite and zirconia10.1023/A:1004718503991 ↗
6. Dual-phase magnesia–zirconia ceramics with strength retention at elevated temperatures10.1007/BF01168947 ↗
7. Grain size effect on mechanical strength of MgO–ZrO2 composite ceramics10.2109/jcersj.100.191 ↗
8. Sintering and microstructure development in the system MgO–TiO210.1023/A:1004443728590 ↗
9. Effect of Cr2O3 on properties of refractories
10. Characteristics of MgO–ZrO2 raw materials
11. Development of magnesia–zircon castable for steel ladle slag line
12. Electrical and gas-sensing properties of WO3 semiconductor material10.1016/S0038-1101(01)00126-5 ↗
13. Other catalytic properties10.1016/S0920-5861(99)00303-X ↗
14. “High-temperature” magnesium tungstate, MgWO4, prepared at moderate temperature10.1016/0167-2738(89)90214-2 ↗
15. Gao · 2002
16. Liang · 1993
17. Enthalpies of formation from the component oxides of MgWO4, CaWO4 (scheelite), SrWO4, and BaWO4, determined by high-temperature direct synthesis calorimetry.10.1016/S0040-6031(96)03026-2 ↗
18. The luminescence of magnesium tungstate dihydrate, MgWO4·2H2O10.1016/0025-5408(87)90036-5 ↗
19. Growth of MgWO4 phosphor by RF magnetron sputtering10.1016/S0254-0584(98)00006-6 ↗