Effect of Filler Shape on the Thermal Conductivity of Thermal Functional Composites

Liu, Changqing; Chen, Mao; Zhou, Demin; Wu, Dezhi; Yu, Wei

doi:10.1155/2017/6375135

Cited by 29 publications

(21 citation statements)

References 98 publications

(108 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hybrid adhesives containing more than two different fillers are often used to achieve high thermal conductivity while maintaining good processibility. The combination of two or more fillers can help to form thermally conductive bridges at lower loadings by maximizing the packing density [33][34][35]. We selected spherical 120 µm MgO as a first component considering its high thermal conductivity, and the second component was added at a ratio of 45 vol% and 15 vol%.…”

Section: Thermal and Mechanical Properties Of Bimodal Adhesivesmentioning

confidence: 99%

Thermal and Adhesion Properties of Fluorosilicone Adhesives Following Incorporation of Magnesium Oxide and Boron Nitride of Different Sizes and Shapes

Sung¹,

Kim²,

et al. 2022

Polymers

View full text Add to dashboard Cite

Thermally conductive adhesives were prepared by incorporating magnesium oxide (MgO) and boron nitride (BN) into fluorosilicone resins. The effects of filler type, size, and shape on thermal conductivity and adhesion properties were analyzed. Higher thermal conductivity was achieved when larger fillers were used, but smaller ones were advantageous in terms of adhesion strength. Bimodal adhesives containing spherical MgOs with an average particle size of 120 μm and 90 μm exhibited the highest conductivity value of up to 1.82 W/mK. Filler shape was also important to improve the thermal conductivity as the filler type increased. Trimodal adhesives revealed high adhesion strength compared to unimodal and bimodal adhesives, which remained high after aging at 85 °C and 85% relative humidity for 168 h. It was found that the thermal and adhesion properties of fluorosilicone composites were strongly affected by the packing efficiency and interfacial resistance of the particles.

show abstract

Section: Thermal and Mechanical Properties Of Bimodal Adhesivesmentioning

confidence: 99%

Thermal and Adhesion Properties of Fluorosilicone Adhesives Following Incorporation of Magnesium Oxide and Boron Nitride of Different Sizes and Shapes

Sung¹,

Kim²,

et al. 2022

Polymers

View full text Add to dashboard Cite

show abstract

“…However, it was not mentioned of any ASTM standard ways used during the testing procedure. Some researchers (Moradi et al, 2019;Liu et al, 2017;Lee et al, 2015;Tekce et al, 2007) evaluated the mechanical strength and thermal conductivity of MEC consisting of copper and brass fillers. Khushairi et al (2017) initiated a series of testing to investigate the effect of metal fillers on the density, mechanical and thermal properties of aluminum epoxy.…”

Section: Physical and Mechanical Properties Testingmentioning

confidence: 99%

The potential of metal epoxy composite (MEC) as hybrid mold inserts in rapid tooling application: a review

Hussin

Sharif

Rahim

et al. 2021

RPJ

View full text Add to dashboard Cite

Purpose Rapid tooling (RT) integrated with additive manufacturing technologies have been implemented in various sectors of the RT industry in recent years with various kinds of prototype applications, especially in the development of new products. The purpose of this study is to analyze the current application trends of RT techniques in producing hybrid mold inserts. Design/methodology/approach The direct and indirect RT techniques discussed in this paper are aimed at developing a hybrid mold insert using metal epoxy composite (MEC) in increasing the speed of tooling development and performance. An extensive review of the suitable development approach of hybrid mold inserts, material preparation and filler effect on physical and mechanical properties has been conducted. Findings Latest research studies indicate that it is possible to develop a hybrid material through the combination of different shapes/sizes of filler particles and it is expected to improve the compressive strength, thermal conductivity and consequently increasing the hybrid mold performance (cooling time and a number of molding cycles). Research limitations/implications The number of research studies on RT for hybrid mold inserts is still lacking as compared to research studies on conventional manufacturing technology. One of the significant limitations is on the ways to improve physical and mechanical properties due to the limited type, size and shape of materials that are currently available. Originality/value This review presents the related information and highlights the current gaps related to this field of study. In addition, it appraises the new formulation of MEC materials for the hybrid mold inserts in injection molding application and RT for non-metal products.

show abstract

“…The results indicate that the sample with micro-sized silica was found to have improved tracking/erosion resistance as compared to the non-filled and nano-filled insulator. In [20,21], alumina trihydrate and aluminum oxide has been used as filler and enhanced electrical, mechanical, thermal, and tracking/erosion was observed. A new concept of simultaneous addition of micro and nanoparticles emerges and requires further investigation.…”

Section: Introductionmentioning

confidence: 99%

Investigation of 9000 hours multi-stress aging effects on High-Temperature Vulcanized Silicone Rubber with silica (nano/micro) filler hybrid composite insulator

et al. 2021

View full text Add to dashboard Cite

Degradation in the polymeric insulators is caused due to the environmental stresses. The main aim of this paper is to explore the improved aging characteristics of hybrid samples by adding nano/micro silica in High Temperature Vulcanized Silicone Rubber (HTV-SiR) under long term accelerated aging conditions for 9000 hours. As HTV-SiR is unable to sustain environmental stresses for a long time, thus a long term accelerated aging behavior is an important phenomenon to be considered for field application. The aging characteristics of nano/micro filled HTV-SiR are analyzed by using techniques such as Scanning Electron Microscopy (SEM), Leakage Current (LC), Fourier Transform Infrared Microscopy (FTIR), Hydrophobicity Classification (HC), and breakdown strength for the aging time of 9000 hours. FTIR and leakage currents are measured after every cycle. All the co-filled samples revealed escalated aging characteristics as compared to the neat sample except the SN8 sample (8% nano-silica+20% micro-silica) after 9000 hours of aging. The highest loading of 6% and 8% nano-silica with 20% micro-silica do not contribute to the improved performance when compared with the neat and hybrid samples. However, from the critical experimental analysis, it is deduced that SN2 sample (2% nano-silica+20% micro-silica) is highly resistant to the long term accelerated aging conditions. SN2 has no cracks, lower loss percentages in the important FTIR absorption peaks, higher breakdown strength and superior HC after aging as compared to the unfilled and hybrid samples.

show abstract

Effect of Filler Shape on the Thermal Conductivity of Thermal Functional Composites

Cited by 29 publications

References 98 publications

Thermal and Adhesion Properties of Fluorosilicone Adhesives Following Incorporation of Magnesium Oxide and Boron Nitride of Different Sizes and Shapes

Thermal and Adhesion Properties of Fluorosilicone Adhesives Following Incorporation of Magnesium Oxide and Boron Nitride of Different Sizes and Shapes

The potential of metal epoxy composite (MEC) as hybrid mold inserts in rapid tooling application: a review

Investigation of 9000 hours multi-stress aging effects on High-Temperature Vulcanized Silicone Rubber with silica (nano/micro) filler hybrid composite insulator

Contact Info

Product

Resources

About