Preparation and characterization of porous MgAl2O4 spinel ceramic supports from bauxite and magnesite

Wang, Feng; Ye, Jianke; He, Gang; Liu, Guanghua; Xie, Zhipeng; Li, Jiangtao

doi:10.1016/j.ceramint.2015.02.044

Cited by 59 publications

(17 citation statements)

References 29 publications

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“…Zhao et al presented a dynamic sintering method to create low‐density mullite‐based ceramic proppant using bauxite clay and manganese dioxide, and the samples sintered at 1355°C had the best performance with 2.792 g/cm 3 of apparent density and only 3.22% of breakage ratio under 52 MPa. Moreover, the most applications of nature bauxite in the recent researches are many kinds of ceramic materials …”

Section: Introductionmentioning

confidence: 99%

Effect of the calcining temperatures of low‐grade bauxite on the mechanical property of mullite ceramics

Ren

et al. 2017

Int J Applied Ceramic Tech

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The mullite ceramics with excellent properties were prepared using traditional sintering method, and the starting material was low-grade bauxite without any other additives in this paper. The variations in physical and chemical properties in the process of sintering, the specific surface area of calcined bauxite at different calcining temperatures, and the phase composition of the mullite ceramic and its microstructure were investigated by thermal analysis, laser particle analysis, the X-ray diffraction, and scanning electron microscope, respectively. The effect of calcining temperatures of raw bauxite on mechanical property and sintering mechanism of mullite ceramic were explored and researched. The results showed that the flexural strength can reach 180 MPa, a great difference existed in mullite ceramics prepared from calcined bauxite at different calcining temperatures, and the sintering mechanism included densification of raw bauxite, the activities of calcined bauxite powders, and crystals in calcined bauxite. K E Y W O R D Sbauxite, calcining temperature, mullite, sintering mechanism

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Section: Introductionmentioning

confidence: 99%

Effect of the calcining temperatures of low‐grade bauxite on the mechanical property of mullite ceramics

Ren

et al. 2017

Int J Applied Ceramic Tech

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“…Linear change rate and bulk density are presented in Figs and where every numerical value is the average of the 10 samples' testing values; however, samples fired at 1100°C are not suitable for Archimedes method because of spalling during test. All the samples shrink except the ones sintered at 1100°C with the MgO ratio increases from 3.0 to 4.0, and the expansion is attributed to the formation process of spinel at low temperature . At 1150°C and higher temperatures, shrinkage and bulk density increase with the increase of MgO ratio, excess MgO accelerates the sintering as it has large cations with small charge and thus can disrupt the silicate network and can accelerate the densification…”

Section: Resultsmentioning

confidence: 99%

Effect of Excess Magnesia on the Preparation of Cordierite Based on Waste Foundry Sand

Xiang

et al. 2015

Int J Applied Ceramic Tech

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Waste foundry sand collected from lost foam casting industry is a solid waste that contains ZrSiO4. For the purpose of re‐utilization, it is adopted to synthesize cordierite with the addition of MgO powders and fused silica by direct sintering, meanwhile the effect of various MgO mole ratios on the sintering behaviors is investigated using XRD, SEM, and mercury porosimetry. The lowest temperature corresponding to the formation of cordierite is 1150°C, and the increase of MgO mole ratio does not reduce the temperature for cordierite crystallization but increase the microhardness and thermal expansion coefficients.

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“…Tang et al [8] prepared well-defined porous ceramics with controllable pore size and porosity by burnout of fugitive pore formers. Wang et al [9] and Deng et al [10] prepared porous ceramics by particle stacking. Rainer et al [11] reported the application of in situ foaming technique for the preparation of foam ceramics.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Fabricate Foam Ceramics from Steel Slag

Zheng

Luo

Yang

et al. 2020

Advances in Materials Science and Engineering

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A novel approach is used for fabricating steel slag foam ceramics based on the particle-stabilized foaming method. In this work, steel slag was used as the raw material and propyl gallate (PG) was used as the surface modifier. For the first time, steel slag ceramic foams were successfully fabricated based on particle-stabilized foams. The results show that the stability of the ceramic foams was closely related to the pH value and PG concentration. The porosity and compressive strength could be controlled by changing the solid loading of steel slag and sintering temperature. The porosity of steel slag foam ceramics ranged from 85.6% to 62.53%, and the compressive strength was from 1.74 MPa to 10.42 MPa. The thermal conductivity of steel slag foam ceramics was only 0.067 W (m·K)−1, which shows that it could be used as a thermal insulation material.

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Preparation and characterization of porous MgAl2O4 spinel ceramic supports from bauxite and magnesite

Cited by 59 publications

References 29 publications

Effect of the calcining temperatures of low‐grade bauxite on the mechanical property of mullite ceramics

Effect of the calcining temperatures of low‐grade bauxite on the mechanical property of mullite ceramics

Effect of Excess Magnesia on the Preparation of Cordierite Based on Waste Foundry Sand

A Novel Approach to Fabricate Foam Ceramics from Steel Slag

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