Molten salt synthesis and characterization of SiC whiskers containing coating on graphite for application in Al2O3-SiC-C castables

Liu, Zhenglong; Deng, Chengji; Yu, Chao; Wang, Xing; Ding, Jun; Zhu, Hao

doi:10.1016/j.jallcom.2018.09.107

Cited by 58 publications

(14 citation statements)

References 38 publications

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“…Presently, several technologies, including micropellets [6,7], coatings [8][9][10][11][12][13][14], and graphitic carbon spheres [15,16], have been employed to overcome the above issues. However, in practical applications, these technologies suffer from such drawbacks as discontinuous coating, aggregation and uneven distribution of carbon materials in the castables.…”

Section: Introductionmentioning

confidence: 99%

Effect of in-situ carbon containing calcium aluminate cement on properties of Al₂O₃-SiC-C based trough castables

Yang

Xiao

Ding

et al. 2020

Journal of Asian Ceramic Societies

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The properties of Al 2 O 3-SiC-C castables bonded by in-situ carbon containing calcium aluminate cement (CCAC) were investigated in this study. The results showed that after the Al 2 O 3-SiC-C castables were dried at 110°C, their cold crushing strength (CCS) and cold modulus of rupture (CMOR) increased with the percentage of CCAC. The sample with CCAC content exceeding 2.5% by mass (named C2.5) had higher CCS and CMOR values than those of the model Al 2 O 3-SiC-C castables (named BPS) with ball pitch as the carbon source. After being fired at 1100 and 1450°C, all the castables exhibited increased CCS and CMOR values, while the high apparent porosity of the BPS sample lowered its CCS and CMOR values. Compared with the BPS sample, the carbon materials of the castables bonded by CCAC exhibited improved dispersion in the matrix and excellent oxidation resistance, which enhanced the corrosion resistance of the refractory castables.

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Section: Introductionmentioning

confidence: 99%

Effect of in-situ carbon containing calcium aluminate cement on properties of Al₂O₃-SiC-C based trough castables

Yang

Xiao

Ding

et al. 2020

Journal of Asian Ceramic Societies

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“…Researchers apply technologies including micro‐pellet technology, coating technology, and graphitic carbon spheres to replace ball ptich, in order to solve the problems mentioned above. Compared with the castables using natural flake graphite or ball pitch as carbon source, the water demand for castables is decreased by these techniques, and the strengths, oxidation resistance, thermal shock resistance and corrosion resistance are improved.…”

Section: Introductionmentioning

confidence: 99%

Improved corrosion resistance of Al₂O₃‐SiC‐C castables through in situ carbon containing aluminate cement as binder

Yang

Xiao

Ding

et al. 2020

Int J Applied Ceramic Tech

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Slag corrosion is one of the main damage modes for refractory castables used in iron and steel metallurgy. The matrix plays vital roles for corrosion resistance of refractory castables. In the present paper, the properties of the Al2O3‐SiC‐C‐based trough castables with in situ carbon containing calcium aluminate cement (CCAC) and ball pitch as carbon sources, respectively, were comparatively investigated. The microstructures of the trough castables after corrosion were observed by field‐emission scanning electron microscopy. The results showed that after being corroded at 1450°C for 3 hours, the corrosion depth of Al2O3‐SiC‐C‐castables with CCAC as binder (A2) was 1.2 mm, 65.71% lower than that of the trough castables with ball pitch as carbon source (A1), though the content of carbon materials in the former was much lower than that of the latter. The reasons for these observations were that the in situ carbon materials of CCAC exhibit improved distribution in the matrices of castables and excellent oxidation resistance, resulting in lower porosity within the castables, and hindered the penetration of the molten slag at high temperatures. In addition, the Al2O3‐SiC‐C‐castables bonded by CCAC displayed good mechanical properties at room temperature and elevated temperature.

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“…As linings for high‐temperature industrial furnaces, refractory materials are responsible for the high energy efficiency of these furnaces . In recent years, replacing traditional dense wear linings with lightweight linings has been considered a promising approach to improve the heat insulation of industrial furnaces.…”

Section: Introductionmentioning

confidence: 99%

“…As linings for high-temperature industrial furnaces, refractory materials are responsible for the high energy efficiency of these furnaces. 1,2 In recent years, replacing traditional dense wear linings with lightweight linings has been considered a promising approach to improve the heat insulation of industrial furnaces. However, because wear linings suffer from corrosion/penetration and from wear caused by high-temperature melts, the greatest concerns are related to the slag resistance and mechanical strength of lightweight materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of lightweight alumina with nanoscale intracrystalline pores

Huang

et al. 2019

J Am Ceram Soc

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In this study, lightweight alumina containing nanoscale intracrystalline pores was fabricated by introducing zirconia sol and alumina sol into α‐Al2O3 micropowder. The effects of zirconia sol on the sintering behavior of lightweight alumina were also investigated. With the introduction of zirconia sol, the grain growth and phase transformation of nano‐alumina are delayed. Therefore, the structure of the nanoscale pores between nanoparticles can be stabilized during heat treatment, and numerous nanoscale intracrystalline pores with diameters in the range of 50‐300 nm are trapped in the alumina grains. Because of the existence of these nanoscale intracrystalline pores, the thermal conductivity of lightweight alumina decreases significantly. Lightweight alumina with the addition of 0.75 wt% zirconia sol exhibits 31% lower thermal conductivity compared to alumina without zirconia sol.

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Molten salt synthesis and characterization of SiC whiskers containing coating on graphite for application in Al2O3-SiC-C castables

Cited by 58 publications

References 38 publications

Effect of in-situ carbon containing calcium aluminate cement on properties of Al₂O₃-SiC-C based trough castables

Effect of in-situ carbon containing calcium aluminate cement on properties of Al₂O₃-SiC-C based trough castables

Improved corrosion resistance of Al₂O₃‐SiC‐C castables through in situ carbon containing aluminate cement as binder

Fabrication of lightweight alumina with nanoscale intracrystalline pores

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Molten salt synthesis and characterization of SiC whiskers containing coating on graphite for application in Al2O3-SiC-C castables

Cited by 58 publications

References 38 publications

Effect of in-situ carbon containing calcium aluminate cement on properties of Al2O3-SiC-C based trough castables

Effect of in-situ carbon containing calcium aluminate cement on properties of Al2O3-SiC-C based trough castables

Improved corrosion resistance of Al2O3‐SiC‐C castables through in situ carbon containing aluminate cement as binder

Fabrication of lightweight alumina with nanoscale intracrystalline pores

Contact Info

Product

Resources

About

Effect of in-situ carbon containing calcium aluminate cement on properties of Al₂O₃-SiC-C based trough castables

Effect of in-situ carbon containing calcium aluminate cement on properties of Al₂O₃-SiC-C based trough castables

Improved corrosion resistance of Al₂O₃‐SiC‐C castables through in situ carbon containing aluminate cement as binder