Effect of the different additives on the fabrication of porous kaolin-based mullite ceramics

Hou, Zhaoping; Cui, Bingxia; Liu, Liangliang; Liu, Qiang

doi:10.1016/j.ceramint.2016.08.020

Cited by 61 publications

(39 citation statements)

References 22 publications

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“…Mullite formed via the process of reaction of anhydrous metakaolinite decomposed by kaolinite at above 1000°C as shown in Equation , meanwhile, noncrystalline quartz appeared in the resultant. As can be seen from Equation , when the temperature is exceeding 1200°C, the illite decomposition products and α‐Al 2 O 3 decomposed by diaspore formed mullite crystals (secondary mullite in refractory).…”

Section: Resultsmentioning

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: Resultsmentioning

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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“…As it is well known that the green body before sintering would shrink during the sintering process, the bulk density of the ceramic proppants increased with the sintering temperature. The reduction of the bulk density was due to the volume expansion during the mullitization process …”

Section: Discussionmentioning

confidence: 99%

“…The reduction of the bulk density was due to the volume expansion during the mullitization process. 10 As the sintering temperature rose, the apparent density displayed an ascendant trend. The reason may be that a mass of liquid phase was generated, and then Al 2 O 3 species were dissolved in it, which promoted the elimination of the closed pores and thereby the densification of samples.…”

Section: Discussionmentioning

confidence: 99%

Effective reduction of sintering temperature and breakage ratio for a low‐cost ceramic proppant by feldspar addition

Tian

Zhou

et al. 2017

Int J Applied Ceramic Tech

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The second grade bauxite and feldspar were used to synthesize ceramic proppant materials. Phase structure and microstructure of the samples were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. It was found that the feldspar, as a sintering aid, was beneficial to generate liquid phase during the sintering process. The formed liquid phase, not only promoted the densification of the samples, but also reduced the sintering temperature. With the content of feldspar increasing, the sintering temperature gradually decreased. When the content of feldspar was 4 wt.%, the breakage ratio of the samples was reduced to the lowest level of 2.2% at 1400°C under 52 MPa closed pressure, which met the requirement of Chinese Petroleum and Gas Industry Standard (SY/ T 5108-2014). Moreover, the sintering temperature was reduced by 100°C compared with the proppants without adding feldspar.

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“…Recently, many authors have focused their research on the development of low cost ceramic membranes based on natural materials such as apatite powder, natural raw clay, graphite, phosphates, dolomite and kaolin [5,6]. Kaolin has a wide 2 of 12 usage area to prepare ceramic membrane support or filtration layer due to its cheapness and the main components of the kaolin, which are Al 2 O 3 and predominantly SiO 2 [7,8].…”

Section: Introductionmentioning

confidence: 99%

The Investigation of Organic Binder Effect on Morphological Structure of Ceramic Membrane Support

Boussemghoune

Chikhi²,

Özay

et al. 2020

Symmetry

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In this study, we investigated the effect of different organic binders on the morphologic structure of ceramic membrane support. Natural raw clay material (kaolin) was used as the main mineral for ceramic membrane support. The physical and chemical properties of kaolin powder and the supports were identified by X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), thermo gravimetric analysis (TGA), scanning electron microscopy (SEM), particle size and zeta potential distribution. Based on the XRF test, the main composition of kaolin powder was SiO2 (47.41%) and Al2O3 (38.91%), while the rest were impurities. The FTIR spectra showed the functional groups of Si-O and Al-O. The XRD diffractogram of natural raw clay powder identified kaolinite and nacrite were the main mineral phase whereas muscovite and quartz were detected in small quantities in the sample. After prepared the ceramic membrane supports, XRD diffractogram showed that anorthite and gehlenite were detected as the main mineral phases for ethylene glycol (EG), gelatin, methocel and for polyethylene glycol (PEG), respectively. According to BET analyses, the maximum and the minimum pore width were obtained for PEG and gelatin organic binders.

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Effect of the different additives on the fabrication of porous kaolin-based mullite ceramics

Cited by 61 publications

References 22 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

Effective reduction of sintering temperature and breakage ratio for a low‐cost ceramic proppant by feldspar addition

The Investigation of Organic Binder Effect on Morphological Structure of Ceramic Membrane Support

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