Fabrication of porous silicon carbide ceramics at low temperature using aluminum dihydrogen phosphate as binder

Yang, Li; Chen, Lu; Liu, Hong; Ran, Kun; Zhan, Yonghong; Qi, Caixia

doi:10.1016/j.jallcom.2019.01.114

Cited by 31 publications

(6 citation statements)

References 37 publications

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“…Coating thickness was 290 ± 15 µm measured from Figure 4A. 13,17 The large and small grains were identified by EDX analysis as CeO 2 and CePO 4 respectively ( Figure 4C). The four features are shown in Figure 4B.…”

Section: Resultsmentioning

confidence: 98%

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Reactions and emissivity of cerium oxide with phosphate binder coating on basic refractory brick

Juthapakdeeprasert

Gavaldà-Diaz

Lerdprom

et al. 2019

Int J Applied Ceramic Tech

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High emissivity coatings which aim to help the cement industry reduce heat loss in its production process have been developed with different CeO 2 and AlH 6 O 12 P 3 ratios (1:3, 1:5, and 1:12 by volume). The coating slurries were shear thinning and after heat treatment in air at 1300°C, 1°C/min, dwell 3 hours, XRD revealed that CePO 4 forms more easily as the Ce/P ratio decreases. The composition with a 1:5 ratio of CeO 2 :AlH 6 O 12 P 3 was gun sprayed on basic refractory bricks, then heat treated under the same conditions as the slurries. SEM, (S)TEM and EDX were used to study thickness, microstructure, and chemical composition of the coatings which revealed that the coating was composed of pores, CeO 2 grains, CePO 4 grains, and M-P-O glass. SEM images show that CePO 4 was nucleated from a reaction between CeO 2 and AlH 6 O 12 P 3 . Consequently, CePO 4 grains (~2 µm diameter) were smaller than CeO 2 (~10 µm diameter). The emissivities of un-coated and coated basic refractory bricks were measured at 1100 and 1300°C over the wave number range of 700-12 000 cm −1 . At both temperatures, the emissivity of the coated bricks was higher than the uncoated bricks and the emissivity was measured to be higher at a higher temperature for both samples. The coated bricks gave the highest emissivity of 0.81 from 1050 to 11 000 cm −1 which is about twice the un-coated bricks for the same conditions. This demonstrates that the developed high emissivity coating has potential to be used with basic refractory brick. K E Y W O R D Scements, cerium/cerium compounds, coatings, refractories How to cite this article: Juthapakdeeprasert J, Gavalda Diaz O, Lerdprom W, De Sousa Meneses D, Jayaseelan DD, Lee WE. Reactions and emissivity of cerium oxide with phosphate binder coating on basic refractory brick. Int J Appl Ceram Technol.

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Section: Resultsmentioning

confidence: 98%

“…Pores are generated from dehydrogenation of AlH 6 O 12 P 3 as temperature increases. 13,17 The large and small grains were identified by EDX analysis as CeO 2 and CePO 4 respectively ( Figure 4C). CePO 4 formed by a nucleation mechanism and therefore the grains are much smaller than CeO 2 .…”

Section: Resultsmentioning

confidence: 99%

Reactions and emissivity of cerium oxide with phosphate binder coating on basic refractory brick

Juthapakdeeprasert

Gavaldà-Diaz

Lerdprom

et al. 2019

Int J Applied Ceramic Tech

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“…The performance of porous SiC ceramics in different application fields largely depends on their microstructure, porosity, pore size, thermal conductivity, electrical conductivity, mechanical strength, and permeability properties. For example, porous SiC ceramics with lower porosity can demonstrate improved mechanical strength and low permeability properties compared to ceramics with higher porosities at equivalent pore sizes and similar microstructures 20,21 . In contrast, porous SiC ceramics with larger pore sizes show lower strength and higher permeability than ceramics with smaller pore sizes at the same porosity 9,22,23 …”

Section: Introductionmentioning

confidence: 99%

Effects of pore size on electrical and thermal properties of porous SiC ceramics

Das,

Lucio,

Kultayeva

et al. 2023

Int J Applied Ceramic Tech

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Porous SiC ceramics with three different pore sizes (∼7, ∼45, and ∼98 μm) and two different porosities (∼54% and ∼63%) were prepared to investigate the effects of pore size on electrical and thermal properties of the porous ceramics. With an increase in pore size from ∼7 to ∼98 μm at the same porosity (∼54%), the electrical and thermal conductivities of the porous ceramics increased from ∼1.01 to ∼2.30 Ω−1·cm−1 and ∼14.3 to ∼26.2 W·m−1K−1, respectively. Similar trends have been obtained in the ceramics with ∼63% porosity. The porous SiC ceramic with larger pore size has smaller pore/strut interface area at the same porosity, which leads to less carrier scattering and phonon‐pore scattering at the pore/strut interfaces, resulting in higher electrical and thermal conductivities, respectively. These results suggest that the electrical and thermal properties of porous SiC ceramics can be successfully tuned by adjusting the pore size and porosity depending on the application.

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“…Especially after drying at 350–500 °C, it has high resistance of bending, compression, and hydration. [ 28 ] Meanwhile, it possesses good wettability to HGM, which significantly improves the mechanical strength of photothermal material. Furthermore, attributed to the pore‐forming material MS with a network structure, the interconnected porous structure of HGMAM is formed after calcining at 450 °C in air, which could facilitate the water transportation and dissolution of salt in the evaporation process.…”

Section: Introductionmentioning

confidence: 99%

Robustly Inorganic Solar Steam Generator Derived from Hollow Glass Microspheres Based Composites for Desalination

Wang

Niu

et al. 2021

Solar RRL

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Solar steam generation (SSG) offers a clean and sustainable way to produce freshwater from seawater or polluted water by harvesting solar energy. However, it remains a great challenge to integrate all the desired functions in a single evaporation system by using low‐cost materials and simple methods. Herein, we report the design and fabrication of a novel inorganic solar steam evaporator (PPy‐HGMAM) through binding the building block of hollow glass microspheres (HGM) and pore‐forming material of melamine sponge (MS) with interconnection network structure by aluminum dihydrogen phosphate adhesive followed by coating of polypyrrole (PPy) as light absorption layer for efficient SSG. With the merits of high porosity, low thermal conductivity both in the wet (0.107 W m−1 k−1) and dry (0.056 W m−1 k−1) states, super‐hydrophilicity, and strong light absorption (92%), the as‐prepared porous PPy‐HGMAM shows high energy conversion efficiency (92.9%) and evaporation rate (1.56 kg m−2 h−1) under 1 sun (1 kW m−2) illumination, as well as excellent salt‐resistance performance. Combined with its high mechanical strength, self‐floating ability, environment‐friendly, and low cost, along with simple and scalable preparation method, our inorganic PPy‐HGMAM evaporator may hold the great potential for practical large‐scale application in SSG.

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Fabrication of porous silicon carbide ceramics at low temperature using aluminum dihydrogen phosphate as binder

Cited by 31 publications

References 37 publications

Reactions and emissivity of cerium oxide with phosphate binder coating on basic refractory brick

Reactions and emissivity of cerium oxide with phosphate binder coating on basic refractory brick

Effects of pore size on electrical and thermal properties of porous SiC ceramics

Robustly Inorganic Solar Steam Generator Derived from Hollow Glass Microspheres Based Composites for Desalination

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