Preparation of SiC reticulated porous ceramics with high strength and increased efficient filtration via fly ash addition

Liang, Xiong; Li, Yawei; Yan, Weiping; Wang, Qinghu; Tan, Fangguan; He, Zhu; Sang, Shaobai

doi:10.1016/j.jeurceramsoc.2020.11.039

Cited by 46 publications

(12 citation statements)

References 30 publications

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“…4(B), indicating this phenomenon is mainly due to the additive system rather than the sintering condition used in this study. This result indicates that such a composite sintering additive system could promote the mullite phase to preferentially grow along a specific axis, which might be in the same way as the formation of the rod-like mullite [27,28] and the mullite whisker [33,34] reported in other work. Combined with the element distribution in Fig.…”

Section: Microstructure Evolutionsupporting

confidence: 69%

“…Since mullite (3Al2O3•2SiO2) exhibits a similar thermal expansion coefficient to SiC [24], better mechanical properties, good oxidation/corrosion resistance and thermal stability [25,26], aluminium sources are introduced to react with the oxidation-derived SiO2 and form mullite phase. Aluminium source includes alumina [27][28][29], Kaolin [30], aluminium hydroxide [31,32], bauxite [33], fly ash [22,34] and aluminium isopropoxide [35].…”

Section: Introductionmentioning

confidence: 99%

“…Addition of MoO3 could further reduce the mullitization point to around 900 ℃. By carefully controlling the sintering condition, mullite rod or whiskers were observed with MoO3-contained additives [27,31,34] benefiting the enhancement of flexural strength of SiC ceramics.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Composite Sintering Additives: Al(OH)3+Y2O3+CaF2 on the Performance of Porous Mullite Oxide-Bonded SiC Ceramics

Chang

Liu

et al. 2021

Preprint

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A composite sintering additive system: Al(OH)3+Y2O3+CaF2 was proposed for porous mullite oxide-bonded SiC ceramics. Small variations of sintering additives have significant influences on the phase composition, pore shape/size, density and flexural strength. Samples sintered at 1550 ℃ for 4 h in the air atmosphere realized both good mullite densification and no detectable cristobalite phase, which was difficult to be achieved at the same time. Besides, the composite sintering additive system also promoted the formation of columnar shape mullite, which acts as a reinforcement. Flexural strength as high as 108 MPa was achieved at an apparent porosity of 40.3 vol%, which is higher than that sintered by SPS technique. Moreover, those additives also act as pore formers determining the shape and size of pores. Around 8.9 µm strip-like, 11.8 µm continuous channel-like and 4.1 µm irregular pores were obtained for Al(OH)3, Al(OH)3-Y2O3 and Al(OH)3-Y2O3-CaF2 added samples, respectively. Corresponding phase evolution, sintering mechanisms and pore formation models were established. This work provides a simple way to modify the phase, pore size/shape, and strength of mullite oxide-bonded porous SiC ceramics by properly selecting sintering additives without any additional pore formers.

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Section: Microstructure Evolutionsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

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Effects of Composite Sintering Additives: Al(OH)3+Y2O3+CaF2 on the Performance of Porous Mullite Oxide-Bonded SiC Ceramics

Chang

Liu

et al. 2021

Preprint

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“…The rapid increase in compressive strength also indicated that, when the sintering temperature was higher than 1450 °C, the liquid phase formed by the sintering aid facilitated the sintering process, whereby the SiC ceramic particles changed from their original loosely packed state and became tightly bound to each other. The mechanical properties of the porous SiC ceramics were also compared with those of other reported porous ceramics, as shown in Figure 11 [ 23 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ]. It was demonstrated that the porosity and compressive strength of the porous SiC ceramics prepared by different methods differed widely, and the compressive strength decreased with the increase in porosity.…”

Section: Resultsmentioning

confidence: 99%

Microstructures, Mechanical Properties and Electromagnetic Wave Absorption Performance of Porous SiC Ceramics by Direct Foaming Combined with Direct-Ink-Writing-Based 3D Printing

Zhang

Wang

et al. 2023

Materials

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Direct-ink-writing (DIW)-based 3D-printing technology combined with the direct-foaming method provides a new strategy for the fabrication of porous materials. We herein report a novel method of preparing porous SiC ceramics using the DIW process and investigate their mechanical and wave absorption properties. We investigated the effects of nozzle diameter on the macroscopic shape and microstructure of the DIW SiC green bodies. Subsequently, the influences of the sintering temperature on the mechanical properties and electromagnetic (EM) wave absorption performance of the final porous SiC-sintered ceramics were also studied. The results showed that the nozzle diameter played an important role in maintaining the structure of the SiC green part. The printed products contained large amounts of closed pores with diameters of approximately 100–200 μm. As the sintering temperature increased, the porosity of porous SiC-sintered ceramics decreased while the compressive strength increased. The maximum open porosity and compressive strength were 65.4% and 7.9 MPa, respectively. The minimum reflection loss (RL) was −48.9 dB, and the maximum effective absorption bandwidth (EAB) value was 3.7 GHz. Notably, porous SiC ceramics after sintering at 1650 °C could meet the application requirements with a compressive strength of 7.9 MPa, a minimum RL of −27.1 dB, and an EAB value of 3.4 GHz. This study demonstrated the potential of direct foaming combined with DIW-based 3D printing to prepare porous SiC ceramics for high strength and excellent EM wave absorption applications.

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“…In this context, many types of ceramics have been prepared from various industrial wastes. These are mainly: blast furnace slag [14,15], solid ceramic waste [16], fly ash [17][18][19], red mud [20], Glass Frit [21] and glass waste [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Valorisation of Industrial Soda-Lime Glass Waste and Its Effect on the Rheological Behavior, Physical-Mechanical and Structural Properties of Sanitary Ceramic Vitreous Bodies

Boulaiche¹,

Boudeghdegh²,

Haddad³

et al. 2022

ACSM

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In this study, the effect of substitution of feldspar by soda-lime glass waste (SLGW), on rheological behavior, thermal, physical-mechanical and structural properties of sanitary-ware vitreous china (VC) bodies, has been evaluated. The findings show a positive effect on the rheological behavior of the slip, to viscosity, thixotropy, density and casting process. Indeed, during the firing stage at 1230°C, the use of 20 wt. % of SLGW in the composition of VC bodies, improved Bulk density (2 to 2.52 g/cm3), reduced water absorption (0.35 to 0.02%), and increased flexural strength (33 to 51 MPa). The fired samples were characterized using X-ray diffraction, SEM and FTIR analysis; results indicate that Mullite and Quartz are the major phases, with a little presence of anorthite phase formed by SLGW additions. From TGA/DTG analysis, it was found that the use of SLGW (15 wt. %) reduces mass loss of VC bodies (8.83 to 8.53%). These positive results open new horizons for using this waste, as a sound environmental, technological and economic solution.

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Preparation of SiC reticulated porous ceramics with high strength and increased efficient filtration via fly ash addition

Cited by 46 publications

References 30 publications

Effects of Composite Sintering Additives: Al(OH)3+Y2O3+CaF2 on the Performance of Porous Mullite Oxide-Bonded SiC Ceramics

Effects of Composite Sintering Additives: Al(OH)3+Y2O3+CaF2 on the Performance of Porous Mullite Oxide-Bonded SiC Ceramics

Microstructures, Mechanical Properties and Electromagnetic Wave Absorption Performance of Porous SiC Ceramics by Direct Foaming Combined with Direct-Ink-Writing-Based 3D Printing

Valorisation of Industrial Soda-Lime Glass Waste and Its Effect on the Rheological Behavior, Physical-Mechanical and Structural Properties of Sanitary Ceramic Vitreous Bodies

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