Phase composition of alumina–mullite–zirconia refractory materials

Zanelli, Chiara; Dondi, Michele; Raimondo, M.; Guarini, Guia

doi:10.1016/j.jeurceramsoc.2009.07.016

Cited by 43 publications

(19 citation statements)

References 27 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure S2 shows the binary phase diagram of Al 2 O 3 –MgO and Al 2 O 3 –SiO 2 . It can be seen that Al 2 O 3 reacts with MgO to produce a new-phase spinel (MgAl 2 O 4 ) and the reaction product between Al 2 O 3 and SiO 2 includes mullite (Al 6 Si 2 O 13 ). − The predicted result for mullite is consistent with Raman spectroscopy. Although no Mg-containing minerals have been detected in the Raman spectrum, studies have shown that Mg penetrate into the refractory and react with alumina in the refractory to form a new-phase spinel (MgAl 2 O 4 ), which has a high melting point and can prevent the refractory from further corrosion …”

Section: Resultssupporting

confidence: 54%

Bio-Slag High-Temperature Corrosion on an Alumina Refractory under the Reducing Environment

Yan

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

The alkali and alkaline earth metals in the biomass are one of the major challenges that restrict the biomass/low-rankcoal entrained-flow gasification in the way of ash slagging and corrosion. To clarify the corrosive behavior from bio-slag on the refractory material of the gasifiers, this study investigates the blending of biomass with coal for high-temperature corrosion on an alumina refractory in a vertical furnace under the reducing environment. The ash samples from a typical wheat straw (WS) and a Shenhua bituminous coal (SH), as well as their blends in three different mass ratios at 10 wt % WS, 30 wt % WS, and 50 wt % WS, were selected for high-temperature corrosion tests at 1350 °C for 2 h holding time. The obtained slag, especially the cross section, was examined using optical microscopy, scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS), and Raman spectral analysis. Additionally, the thermodynamic calculation was conducted using Factsage. The results show that the addition of WS into SH lowers the ash fusion temperature. The WS30 blends have the lowest ash fusion temperature with a fully molten phase at 1130 °C. The addition of WS promotes the slag fluidity, while adding 30% of WS into SH results in the largest spreading area. Interestingly, the slag with a higher fluidity is more corrosive, indicated by a larger filtrated area and depth in the cross section. Elemental mapping results show that the ash-forming elements are evenly distributed in the slag for fully melted samples. However, the Mg species precipitated near the slag-refractory interface and react with alumina to form a spinel phase that prevents further penetration.

show abstract

Section: Resultssupporting

confidence: 54%

Bio-Slag High-Temperature Corrosion on an Alumina Refractory under the Reducing Environment

Yan

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…This interfacial oxidation profoundly affected the porous features of the sintered YSZ disc. Pertaining to the potential applications of porous YSZ monolith, they mainly include membranes for nano-filtration that could endure extremely corrosive conditions, 17 refractory structure that could retain structural integrity at elevated temperatures, 18 and the anode structural component in solid oxide fuel cells to lodge Ni metal anode catalyst. 19 The gas permeability test and structural analysis of the sintered YSZ disc validated the superior pore-forming role of the graphitized carbon wedges over those that were based on removing porogens at lower temperatures.…”

Section: Introductionmentioning

confidence: 99%

Evolution of throttle-channel dual pores in YSZ ceramic monolith through in situ grown nano carbon wedges

Chen

Hong

Phua

2012

Journal of the European Ceramic Society

View full text Add to dashboard Cite

“…The experimental results showed that at the ratio of the NH 3 to NO concentration of 2:11, 0.5 g of ZrP powders was sufficient for the complete reduction of 500 ppm NO gas for up to 14 h at 750 °C. As for the products of the elimination reaction, ZrO 2 powders can be used as a biocompatible material 35,36 and catalysts/catalyst support, red phosphorus can be used to produce safety matches and organophosphorous pesticide, and the produced N 2 may be collected and used as a protective gas or be converted into liquid nitrogen for other purposes. In this study, we not only identified an active species for NO elimination, but also reduced the amount of NH 3 for NO reduction.…”

Section: Introductionmentioning

confidence: 99%

Efficient reduction of nitric oxide using zirconium phosphide powders synthesized by elemental combination method

Chen

Wang

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Zirconium phosphide (ZrP) powders were synthesized by elemental combination method via the direct reaction of zirconium powders with red phosphorus, and characterized by XRD, SEM, XPS, XRF, SAED and TEM measurements. The obtained ZrP powders were found to exhibit apparent activity in the ready eliminateion of nitric oxide (NO) via facile redox reactions, and the elimination dynamics was evaluated within the context of various important experimental parameters, such as reaction temperature and gas concentration. At a fixed amount of ZrP powders, an increasing amount of NO would be eliminated with increasing reaction temperature, and complete conversion of NO to N2 could be reached in the range of 700 to 800 °C. The addition of NH3 also facilitated NO elimination at a fixed reaction temperature. Furthermore, of the products of the elimination process, zirconia (ZrO2) powder is a kind of biocompatible material, red phosphorus can be used to produce safety matches, organophosphorous pesticide and phosphor bronze, and the produced N2 might be collected and used as a protective gas or be converted into liquid nitrogen for other purposes.

show abstract

Phase composition of alumina–mullite–zirconia refractory materials

Cited by 43 publications

References 27 publications

Bio-Slag High-Temperature Corrosion on an Alumina Refractory under the Reducing Environment

Bio-Slag High-Temperature Corrosion on an Alumina Refractory under the Reducing Environment

Evolution of throttle-channel dual pores in YSZ ceramic monolith through in situ grown nano carbon wedges

Efficient reduction of nitric oxide using zirconium phosphide powders synthesized by elemental combination method

Contact Info

Product

Resources

About