Transparent polycrystalline spinel ceramic was fabricated without any sintering aids by spark plasma sintering method of a mixture of Al2O3 and MgO powders for only 10min soak at 1250°C. Densification, microstructure and optical transparency of spinel were examined. The spinel exhibits an in-line transmission of 55% for a visible-wavelength of 470nm and high hardness value of 2040 HV.

Ruthenium site structures supported on metal oxide surfaces were designed by reacting organometallic Ru cluster [Ru6C(CO)16](2-) or [Ru6(CO)18](2-) with various metal oxides, TiO2, Al2O3, MgO, and SiO2. The surface Ru site structure, formed under various catalyst preparation and reaction conditions, was investigated by the Ru K-edge extended X-ray absorption fine structure (EXAFS). Samples of [...

Secondary hematite (SH) is a serious factor resulting in reduction degradation of iron ore sinter blast furnace; however, until now, quantitative study for SH formation had not been reported. In this work, the effects gangue composition, including MgO, Al2O3 and SiO2, on solid-state sintering process fines were investigated quantitatively. It shows that decreased from 67.84% to 46.11%, 35.44% 2...

To optimize Al2O3 content in high basicity CaO-SiO2-Al2O3-8%MgO-8%CaF2 slag (%CaO/%SiO2=6) used for the refining of heat-resistant austenitic stainless steel, effect on viscosity and ability was systematically investigated, relevant mechanism clarified based analyses solid phase precipitation behaviour ionic unit structure transformation. The results demonstrated that dramatically decreased mar...

The influence of Al2O3 in the range 10–20 mass% and TiO2 0.55–5 on flow behavior, viscosity, density, surface tension molten industrial blast furnace slag with CaO/SiO2 = 1.13 is investigated using a high-temperature microscope, rotating viscometer, maximum bubble pressure method. measurement results show that acts as network former studied CaO–SiO2–MgO–Al2O3–TiO2 slags. With an increase conten...

Today, bi - reforming of methane is considered as an emerging replacement for the generation high-grade synthesis gas (H2:CO = 2.0), and also encouraging renewable energy substitute fossil fuel resources. For achieving high conversion levels CH4, H2O, CO2 in this process, appropriate operation variables such pressure, temperature molar feed constitution are prerequisites yield gas. One biggest ...

It is a popular countermeasure to add MgO into sinter cope with the use of high-Al2O3 iron ore. The effects particle size MgO-bearing flux on strength sintered sample (Fe2O3-MgO and Fe2O3-MgO-CaO series) are discussed in present work for purpose improving before after reduction. experimental results show that (1) increase fine light calcined magnesite (LCM) from 0 100%, compressive Fe2O3-MgO se...

Ultra-calcic ankaramitic magmas or melt inclusions are ubiquitous in arc, ocean-island and mid-ocean ridge settings. They are primitive in character (XMg 4 0 65) and have high CaO contents (414 wt %) and CaO/Al2O3 (41 1). Experiments on an ankaramite from Epi, Vanuatu arc, demonstrate that its liquidus surface has only clinopyroxene at pressures of 15 and 20 kbar, with XCO2 in the volatile comp...