Effects of Ytterbium Oxide Nanopowder Particle Size on the Acoustic Properties of Silicone Rubber Lens for Medical Echo Array Probe

Silicone rubber room temperature vulcanization (RTV) is widely used as an insulator. This paper aims to improve the electrical and mechanical properties of RTV with organic filler from golden apple snail shells. The processed golden apple snail shells have the particle size of 75 μm. Specimen were made from silicone rubber with an addition of organic filler and inorganic filler for tested under ASTM D638-2a standard. The filler ratio was varying from 0 to 50% by weight with incremental of 5%. Experimental results showed that, there were good agreement in threshold of electrical and mechanical properties. RTV with the organic filler ratio of 40% out performed the inorganic filler in electrical aspect. Tensile strength of RTV was found to be increased when 5% addition of organic filler is used and decreases steadily as this filler is increased. The amount of filler has greater contribution to the hardness property of the RTV and it may become brittle when it is used in excessive amount.

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Influence of proportion and particle size gradation of rubber from end-of-life tires on mechanical, thermal and acoustic properties of plaster–rubber mortars

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2012.12.063 ◽

2013 ◽

Vol 47 ◽

pp. 633-642 ◽

Cited By ~ 52

Author(s):

S. Herrero ◽

P. Mayor ◽

F. Hernández-Olivares

Keyword(s):

Particle Size ◽

End Of Life ◽

Acoustic Properties ◽

Particle Size Gradation

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Assessment of the Physical, Mechanical and Acoustic Properties of Arundo donax L. Biomass in Low Pressure and Temperature Particleboards

Polymers ◽

10.3390/polym12061361 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1361

Author(s):

Maria Teresa Ferrandez-García ◽

Antonio Ferrandez-Garcia ◽

Teresa Garcia-Ortuño ◽

Clara Eugenia Ferrandez-Garcia ◽

Manuel Ferrandez-Villena

Keyword(s):

Particle Size ◽

Absorption Coefficient ◽

Transmission Loss ◽

Raw Material ◽

Acoustic Properties ◽

Giant Reed ◽

Sound Insulation ◽

New Mineral ◽

Particle Sizes ◽

Insulation Material

Traditionally, plant fibres have been used as a raw material for manufacturing construction materials; however, in the last century, they have been replaced by new mineral and synthetic materials with manufacturing processes that consume a large amount of energy. The objective of this study was to determine the mechanical, physical and acoustic properties of panels made from giant reed residues. The article focuses on evaluating the acoustic absorption of the boards for use in buildings. The materials used were reed particles and urea–formaldehyde was used as an adhesive. The panels were produced with three particle sizes and the influence that this parameter had on the properties of the board was evaluated. To determine the absorption coefficient, samples were tested at frequencies ranging from 50 to 6300 Hz. The results showed that the boards had a medium absorption coefficient for the low and high frequency range, with significant differences depending on the particle size. The boards with 2–4 mm particles could be classified as Class D sound absorbers, while boards with particle sizes of 0.25–1 mm showed the greatest sound transmission loss. Unlike the acoustic properties, the smaller the particle size used, the better the mechanical properties of the boards. The results showed that this may be an appropriate sound insulation material for commercial use.

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