The sound absorption properties of highly porous silicon nitride ceramic foams

Du, Zhongpei; Yao, Dongxu; Xia, Yongfeng; Zuo, Kaihui; Yin, Jinwei; Liang, Hanqin; Zeng, Yu‐Ping

doi:10.1016/j.jallcom.2019.153067

Cited by 33 publications

(22 citation statements)

References 23 publications

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“…The flow resistance also shows a slight reduction trend along with the increase of the average pore size of porous ceramics. Moreover, compared to porous ceramics with spherical pores (the flow resistance of 57.89.10 5 Pa·S/m 2 for porous silicon nitride with porosity of 92%), 38 such flow resistances are much smaller, and may contribute to the sound absorption performance.…”

Section: Resultsmentioning

confidence: 99%

The sound absorption performance of the highly porous silica ceramics prepared using freeze casting method

Yao

Xia

et al. 2020

J Am Ceram Soc

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Highly porous silica ceramics with unidirectional pores were prepared using the freeze casting method. By adjusting the solid content and freezing temperature, the porosity of the ceramics was tailored in the range of 78.20%‐84.59% and pore size in the range of 8.4‐71.4 μm, respectively. Sound absorption properties of porous silica ceramics was studied and the effect of structural factors was systematically investigated. The results showed that higher porosity and smaller pores of the porous ceramics favored the sound absorption in the entire sound wave frequency. By backing the sample with small pore size porous ceramics, the sound absorption property was enhanced, particularly in the low and medium frequency range, thus the sound absorption peak shifted towards lower frequency. The presence of air gap in the back would also favor sound absorption in low and medium frequency range. The as‐fabricated porous silica ceramics owed excellent sound absorption properties due to their unidirectional pores and low flow resistances.

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Section: Resultsmentioning

confidence: 99%

The sound absorption performance of the highly porous silica ceramics prepared using freeze casting method

Yao

Xia

et al. 2020

J Am Ceram Soc

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“…Du et al. [44] inspected the positive performance of the ceramic foams on the acoustic property in the whole frequency domain. Jena et al.…”

Section: Methodsmentioning

confidence: 99%

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Zarastvand

Ghassabi

Talebitooti

2021

Jnl of Sandwich Structures & Materials

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This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 references are reviewed and described from the first [Formula: see text] to [Formula: see text]. In the first part, in addition to the presentation of a complete explanation about the importance of the acoustic analysis of these structures, appropriate formulations are also provided. Furthermore, an overview of the thematic correspondent is carried out. Since the type of material used in these constructions can be very important in sound insulation, the significance of this subject is remarked. The papers are then classified based on their acoustic excitation fields containing plane wave, diffuse, random, and point source. After analyzing the research approaches according to different environmental properties, the articles are ordered based on their boundaries as finite and infinite. To present reliable outcomes, it is necessary to investigate a proper theory proportional to the structure’s thickness. Herewith, this issue is also discussed in detail. The review is also expanded to focus on the different vibroacoustic solutions. Before concluding remarks, the authors' research works are presented wherein either optimization algorithms or control techniques improve the acoustic performance of these structures.

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“…Passive noise reduction is used to implement sound insulation and sound absorption technology. Among them, foams are the widely designed and investigated materials to realize effective sound absorption in broadband frequency [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…Plastic foams are a polymer material with solid plastic as the matrix and a large number of gas distributed micropores inside. Compared to pure plastic, plastic foams have low density, light weight, good impact resistance, low thermal conductivity, good heat insulation, and excellent sound absorption performance, and they are widely used in industries due to their low cost and ease of syntheses [ 4 , 6 , 12 , 13 ]. Polyurethane (PU) foam and polyvinyl chloride (PVC) foam are currently the two most common materials used for indoor sound absorption and noise reduction.…”

Section: Introductionmentioning

confidence: 99%

Improved Mechanical and Sound Absorption Properties of Open Cell Silicone Rubber Foam with NaCl as the Pore-Forming Agent

et al. 2021

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Porous materials hold great potential in the field of sound absorption, but the most abundantly used materials, such as Polyurethane (PU) foam and polyvinyl chloride (PVC) foam, would inevitably bring environmental harms during fabrication. In this study, the nontoxic addition-molded room temperature vulcanized silicone rubber is chosen as the matrix, and NaCl particles are chosen as the pore forming agent to prepare open cell foams via the dissolve-separating foaming method. The effect of different amounts of NaCl (0–100 phr) on the cell structure, mechanical and sound absorption properties is investigated and analyzed. The results indicate that the cell structure could be tailored via changing the addition amount of NaCl, and open cell silicon rubber foams could be achieved with more than 20 phr NaCl addition. Open cell silicon foams show the most effective sound absorption for sound waves in middle frequency (1000–2000 Hz), which should be attributed to the improved impedance matching caused by the open cell structures. Additionally, the mechanical properties, including hardness, tensile strength and corresponding elastic properties, gradually decay to a steady value with the increasing addition amount of NaCl. Therefore, open cell silicone rubber foams are capable of sound absorption in middle frequency.

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The sound absorption properties of highly porous silicon nitride ceramic foams

Cited by 33 publications

References 23 publications

The sound absorption performance of the highly porous silica ceramics prepared using freeze casting method

The sound absorption performance of the highly porous silica ceramics prepared using freeze casting method

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Improved Mechanical and Sound Absorption Properties of Open Cell Silicone Rubber Foam with NaCl as the Pore-Forming Agent

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