Properties investigation on isotropical conductive adhesives filled with silver coated carbon nanotubes

Wu, Haiping; Wu, Xingda; Ge, Mingyuan; Zhang, G.Q.; Wang, Y.W.; Jiang, Jianzhong

doi:10.1016/j.compscitech.2006.05.010

Cited by 89 publications

(38 citation statements)

References 12 publications

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“…It was observed that the heat-treated powders have larger particle size than the powder itself due to the coalescence and the agglomeration of the nanosized powders by rising the temperature. It was deduced that the above-mentioned process was used to fabricate CNT/Ag nanocomposites having higher content of CNTs up to 10 vol.% than previously published research work [22,23]. It was expected that, the produced CNT/Ag powders can be used as conductive adhesives and as starting powder for fabricating electric conductive materials by powder technology.…”

Section: Resultsmentioning

confidence: 92%

“…In order to functionalise CNTs with these nanoparticles, and due to their low-binding energies [15], it is necessary to modify the surface graphene structure of the CNTs in order to create the desired functional groups that are able to link with metal clusters. Considerable research efforts have been devoted to the fabrication of Ag nanoparticles supported on CNTs as conductive adhesives as well as electrical contact materials having CNT content up to 1 wt.% [16][17][18][19][20][21][22][23]. However, most of these techniques, including electrochemical and other chemical or physical approaches, either require pretreatment of CNTs, such as oxidation by strong oxidising acid or functionalisations with a surfactant or polyelectrolyte [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…CNT/silver nanocomposite powder can be used as a replacement for lead-bearing solder, isotropic conductive adhesives and has important applications in electronic industry [22]. Also it was expected that addition of reinforcement material like CNT as antifriction material like graphite to silver matrix can produce a unique material having good wear properties and little electrical and thermal resistance as possible instead of graphite/silver composites or silver metal itself [23].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of multi-walled carbon nanotube/silver nanocomposite powders by chemical reduction in aqueous solution

Daoush

Hong

2013

Journal of Experimental Nanoscience

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Carbon nanotube (CNT)/silver nanocomposite powders with different volume fractions of CNTs 2.5, 5 and 10 vol.% were prepared by chemical reduction in solution. Multi-walled CNTs underwent surface modifications for functionalisations by acid treatments. The acid-treated CNTs were investigated by FT-IR and X-ray photoelectron spectroscopy. The spectroscopic investigations of the acid-functionalised CNTs detected that several kinds of functional groups attached with the graphene structure as well as produced short and de-caped CNTs. Acidic stannous chloride solution was used to sensitise the surface of the functionalised CNTs. Silver was deposited on the surface of sensitised CNTs with chemical reduction reaction of alkaline silver nitrate solution by formaldehyde at room temperature and pH � 9. The morphology of the produced CNT/silver nanocomposite powder was investigated by high-resolution SEM and TEM. It was observed that the produced CNT/silver nanocomposite powders have decorated type of spherical silver particle size 2-5 nm deposited on the surface of CNTs as well as the CNTs were implanted in large spherical silver nanoparticles of particle size �200 nm. The chemical analysis of the produced powder indicates that some oxygen content is included in the prepared powders which can be reduced by heat treatment at temperatures between 300 � C and 400 � C under hydrogen atmosphere.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of multi-walled carbon nanotube/silver nanocomposite powders by chemical reduction in aqueous solution

Daoush

Hong

2013

Journal of Experimental Nanoscience

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“…One possible solution is to use, instead of a standard type of filler (silver flakes for isotropically conductive adhesives), carbon nanotubes or silver coated carbon nanotubes. Carbon nanotubes i~prove mechanical parameters of adhesive, if they are sIlver coated; electrical properties are improved, too [2]. The main disadvantage of such the solution is extremely high price.…”

Section: Introductionmentioning

confidence: 99%

Testing of techniques for improvement of conductivity of electrically conductive adhesives

Mach

Richter

Pietriková

2008

2008 2nd Electronics Systemintegration Technology Conference

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The paper presents methods, which have been used for improvement of electrical conductivity of electrically conductive adhesives with isotropical electrical conductivity. Conductivity level depends, among other things, on level of aggregation of filler particles. The research has been focused on improvement of electrical properties by better aggregation of filler particles in adhesive. Following methods have been tested with the goal to support aggregation: ultrasound mixing for 60s, rotary mixing for 60 s, and addition of a small amount of AgN0 3 . The goal of addition of this salt has been to decrease Coulomb forces between particles of filler. Four types of formulations have been used for experiments. One-component formulations: adhesives bisphenol epoxy resin with 75 % (wt.) silver flakes, bisphenol epoxy resin with 75 % (wt.) silver flakes + 10 % (wt.) silver nanoparticles, bisphenol epoxy resin with 65 % (wt.) silver flakes + 20 % (wt.) silver nanoparticles. Two component formulation: bisphenol epoxy resin with 55 % (wt.) silver flakes. It has been found that ultrasound mixing has low influence only to the value of the electrical conductivity of adhesive, rotary mixing before application of the adhesive improves electrical conductivity significantly; addition of AgN0 3 into the adhesive has improved electrical conductivity of two formulations and has had almost no effect for two other formulations. As a part of this work the course of electrical conductivity of adhesives during the curing time has also been investigated.

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“…It is possible to meet balls, grains, flakes, wires or tubes. Materials of nanoparticles are silver, gold, nickel or copper, nanotubes are mostly of carbon [4], [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Thermal ageing of electrically conductive micro/nano adhesives

Mach

Busek

2010

2010 IEEE 16th International Symposium for Design and Technology in Electronic Packaging (SIITME)

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Abstract-Electrical as well as mechanical properties of electrically conductive adhesives can be modified by addition of different types of nanoparticles. It has been investigated if changes of the resistance of adhesive joints caused by thermal ageing will differ in dependence on the type of nanoparticles added into adhesives. It has been found that adhesive joints formed of adhesives modified such the way have the same dependence of the resistance on the conditions of thermal ageing. That means, that nanoparticles added into adhesive in concentration up to 2,5 % b. w. does not cause changes of an ageing mechanism of adhesive matrix.

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Properties investigation on isotropical conductive adhesives filled with silver coated carbon nanotubes

Cited by 89 publications

References 12 publications

Synthesis of multi-walled carbon nanotube/silver nanocomposite powders by chemical reduction in aqueous solution

Synthesis of multi-walled carbon nanotube/silver nanocomposite powders by chemical reduction in aqueous solution

Testing of techniques for improvement of conductivity of electrically conductive adhesives

Thermal ageing of electrically conductive micro/nano adhesives

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