A novel fabrication approach for improving the mechanical and sound absorbing properties of porous sound-absorbing ceramics

Wang, Wei; Liu, Haitao; Gu, Wanduo

doi:10.1016/j.jallcom.2016.11.147

Cited by 34 publications

(12 citation statements)

References 29 publications

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“…The obtained sound absorbing coefficients of the two metal foams in the frequency range of 100 Hz ~ 1000 Hz were shown in figure 2. It could be found that for the same material of metal foam, no matter copper foam or iron foam, the sound absorbing coefficients increased along with the increase of thickness from 5 mm to 30 mm in most detected frequency points, which was coincident with the results reported in the research of sound absorbing performances of the porous materials [13][14][15]. Meanwhile, it could be observed that the sound absorbing coefficients of the two metal foams in the low frequency range were low, and the maximum was no more than 40%.…”

Section: Pure Metal Foam Modesupporting

confidence: 85%

Comparison of sound absorbing performances of copper foam and iron foam with the same parameters

Yang¹,

Shen²,

Xu³

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Sound absorbing performances of the copper foam and the iron foam with the same parameters were investigated by the AWA6128A detector according to standing wave method. Two modes were investigated, which included the pure metal foam mode and the combination mode with the settled thickness of metal foam. In order to legibly compare the sound absorbing coefficients of the two metal foams, the detected sound frequency points were divided into the low frequency range (100 Hz ~ 1000 Hz), the middle frequency range (1000 Hz ~ 3200 Hz), and the high frequency range (3500 Hz ~ 6000 Hz). Sound absorbing performances of the two metal foams in the two modes were discussed within the three frequency ranges in detail. It would be calculated that the average sound absorbing coefficients of copper foam in the pure metal foam mode were 12.6%, 22.7%, 34.6%, 43.6%, 51.1%, and 56.2% when the thickness was 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, and 30 mm. meanwhile, in the combination mode, the average sound absorbing coefficients of copper foam with the thickness of 10 mm were 30.6%, 34.8%, 36.3%, and 35.8% when the cavity was 5 mm, 10 mm, 15 mm, and 20 mm. In addition, those of iron foam in the pure metal foam mode were 13.4%, 20.1%, 34.4%, 43.1%, 49.6%, and 56.1%, and in the combination mode were 25.6%, 30.5%, 34.3%, and 33.4%.

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Section: Pure Metal Foam Modesupporting

confidence: 85%

Comparison of sound absorbing performances of copper foam and iron foam with the same parameters

Yang¹,

Shen²,

Xu³

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Therefore, the high cost limits the applications. The natural porosity of geopolymer and the simplicity of synthesis methods 254 make geopolymers an economical porous ceramic material 255,256 …”

Section: Porous Geopolymer Applicationsmentioning

confidence: 99%

“…The natural porosity of geopolymer and the simplicity of synthesis methods 254 make geopolymers an economical porous ceramic material. 255,256 Geopolymer has the advantages of low-temperature curing and no sintering, but in high-temperature applications, high-temperature sintering is still needed to prepare geopolymer-based porous ceramics. Because chemical reaction (alkaline activation) and consolidation can partially replace the sintering process, the preparation temperature of porous geopolymer ceramics may be lower than that of ordinary materials.…”

Section: Porous Ceramics Fieldmentioning

confidence: 99%

A review on the porous geopolymer preparation for structural and functional materials applications

Chen

et al. 2022

Int J Applied Ceramic Tech

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Geopolymer (also called inorganic polymers) is a kind of amorphous gel material with a 3D structure consisting of SiO4 and AlO4 tetrahedra. It has drawn international attention due to its environmental friendliness and excellent performance. This review covers raw materials, preparation methods, and applications of porous geopolymer materials with micropore, mesopore, or macropore. The preparation methods can be divided into five categories: (i) self‐forming method, (ii) direct foaming method, (iii) adding filler method, (iv) particles stacking method, and (v) other methods. In this paper, different raw materials and applications were combined with the preparation methods, and some general conclusions of porous geopolymer were summarized. The applications of porous geopolymer materials in building materials, adsorbents, porous ceramics, membrane separation, catalyst, pH regulator, and other fields were introduced as well.

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“…We can find that the jute fibers possessed a cavity (Figure 3g) that can form small interconnected pores in the composite material. 15 When the sound wave entered into the composite material, the air in the pores would rub against the cavity wall and the sound energy was converted into heat energy and consumed. 16,17 In addition, when the sound wave propagated inside the composite material and encountered the fiber, it was equivalent to encountering an obstacle.…”

Section: Effect Of Fiber Content On Mechanical Performancementioning

confidence: 99%

Mechanical and Acoustic Properties of Jute Fiber-Reinforced Polypropylene Composites

Shen

Xiong

2021

ACS Omega

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Chemical fibers such as glass fiber and aramid cover a large proportion of sound-absorbing composite materials on the current commercial market. These materials possess superior mechanical properties but have the disadvantages of high production costs and energy consumption and difficult recovery and degradation. In this paper, jute fiber and polypropylene were selected as raw materials, and a series of jute fiber-reinforced polypropylene composite materials were prepared by a mixing-hot-pressing process. The acoustic and mechanical performances of the composites with different fiber contents and fiber residue ratios were discussed. The results showed that the sound absorption coefficient values increased with the increasing fiber content and decreasing residual gum ratio. The mechanical properties varied inversely with the residual gum rate. With the increase of fiber content, the tensile and bending strengths first increased and then decreased. Therefore, the jute fiber-reinforced polypropylene composites can possess favorable sound absorption performance with no mechanical property penalty by adjusting the parameters properly, demonstrating that the composite materials have promising applications in the acoustic field.

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A novel fabrication approach for improving the mechanical and sound absorbing properties of porous sound-absorbing ceramics

Cited by 34 publications

References 29 publications

Comparison of sound absorbing performances of copper foam and iron foam with the same parameters

Comparison of sound absorbing performances of copper foam and iron foam with the same parameters

A review on the porous geopolymer preparation for structural and functional materials applications

Mechanical and Acoustic Properties of Jute Fiber-Reinforced Polypropylene Composites

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