Composite Materials with Adjustable Thermal Expansion for Electronic Applications

Shi, Jialin; Pu, Zhao; Wu, Kun; Larkins, G.L.

doi:10.1557/proc-445-229

Cited by 28 publications

(32 citation statements)

References 7 publications

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“…However, in some cases, such as Al 2 TiO 5 , microstructural design and microcrack formation can be used to advantage to produce low thermal expansion materials with high thermal shock resistance [10]. On the other hand, the second approach makes use of the addition of thermomiotics, as the dispersed phase, in composites [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. The most common role of thermomiotics in composites is to control the CTE of the matrix phase, which could be a metal, ceramic or polymer.…”

Section: Introductionmentioning

confidence: 99%

“…These tentative attempts generally focus on ZrW 2 O 8 , both as micronic and nanometric powders [11,[15][16][17][23][24][25]. This is understandable considering the isotropic physical properties of ZrW 2 O 8 and its strong negative CTE (* -9 9 10 -6 K -1 ) over a wide temperature range (0-1050 K), which includes the operational temperature range for polymer components.…”

Section: Introductionmentioning

confidence: 99%

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Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

et al. 2014

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Recently, polymer composites reinforced with low fractions of thermomiotic nanoceramics have triggered a lot of research. The efforts have been focused on achieving considerable reduction of the coefficient of thermal expansion (CTE) of polymeric materials without deterioration of other physical properties. In this context, polyethylene (PE) composites reinforced with different loads of Al 2 Mo 3 O 12 nanofillers (0.5-4 mass %) were fabricated by micro-compounding. To enhance the interfacial interaction between the two components, chemical functionalization of Al 2 Mo 3 O 12 was performed with vinyltrimethoxysilane (VTMS) prior to micro-compounding. Infrared spectroscopy and thermogravimetry demonstrated the successful grafting of VTMS on the Al 2 Mo 3 O 12 surface. The composites showed strongly decreased CTEs, up to 46 % reduction for loadings of 4 mass % compared with neat PE, suggesting intimate filler-matrix interactions. The variation of CTEs of the composites in terms of the filler fraction was successfully described by Turner's model allowing calculation of the bulk modulus of monoclinic Al 2 Mo 3 O 12 (13.6 ± 2.6 GPa), in agreement with the value obtained by an ultrasonic method. The thermal stability of the composites was improved, although the addition of functionalized fillers decreased the degree of crystallinity of the PE to a small extent. The Young's modulus and yield strength of the composites increased from 6.6 to 19.1 % and 4.0-6.0 %, respectively, supporting the existence of strong filler-matrix interactions, contributing to an efficient load transfer. Finite element analysis of thermal stresses Electronic supplementary material The online version of this article (

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

et al. 2014

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“…Shi et al first reported that cubic zirconium tungstate (ZrW 2 O 8 ), which exhibits large negative CTE at 8.7 ppm/K [4], can be used to reduce the thermal expansion of polyester and epoxy resin in 1997 [5]. Loadings of ZrW 2 O 8 particles ranging from 0 to 30 vol % significantly reduce the CTEs from 94 to 56 ppm/K for polyester and from 54 to 18 ppm/K for epoxy composites.…”

Section: Introductionmentioning

confidence: 99%

Low Thermal Expansion Composites Prepared from Polyimide and ZrW<su>2O8 Particles with Negative Thermal Expansion

Yamashina

Isobe

Ando

2012

J. Photopol. Sci. Technol.

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Inorganic/polymer composite films with adjustable small thermal expansion were prepared by incorporating sub-m sized particles of zirconium tungstate (ZrW 2 O 8 ) into aromatic polyimide (PI). ZrW 2 O 8 particles exhibit negative coefficients of thermal expansion (CTE) between 4.8 to 8.7 ppm/K. The cross-sectional SEM images of ZrW 2 O 8 /PI composite films indicate that filler particles are homogeneously dispersed in PI matrix without aggregation. The CTEs of these films are linearly decreased with increasing the volume fraction of ZrW 2 O 8 . The CTE of a composite film containing 60 vol% of filler is as low as that of metallic copper (17 ppm/K). Assuming that the thermal expansion behavior is three-dimensionally isotropic, PI composite films containing more than 50 vol% of ZrW 2 O 8 could achieve coefficients of volumetric thermal expansion smaller than 50 ppm/K. Keyword: Polyimide / thin film / zirconium tungstate / thermal expansion / Organic-inorganic composite

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“…[1][2][3][4][5][6][7][8][9] Despite its large negative CTE and interesting phase behavior, only a few researchers have examined the impact of ZrW 2 O 8 as filler in polymer matrix composites. Shi and coworkers 10 reported that the incorporation of 30 volume (vol)% of ZrW 2 O 8 with a polyester resin resulted in a 40% decrease in CTE. Weyer and coworkers 11 observed an 80% reduction in CTE on addition of up to 52 vol% ZrW 2 O 8 in a cyanate ester resin.…”

Section: Introductionmentioning

confidence: 99%

Zirconium tungstate reinforced cyanate ester composites with enhanced dimensional stability

2009

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Zirconium tungstate (ZrW 2 O 8 ) is a unique ceramic material characterized by isotropic negative thermal expansion behavior over a wide temperature range. Incorporation of ZrW 2 O 8 is expected to improve the dimensional stability of polymers by reducing the overall coefficient of thermal expansion (CTE). In this work, the thermal and dynamic mechanical properties of a bisphenol E cyanate ester reinforced with various loadings of ZrW 2 O 8 are examined. Thermomechanical analysis indicates that the incorporation of ZrW 2 O 8 results in a decrease in CTE at temperatures above and below the glass transition temperature (T g ) of the neat resin. The dynamic storage moduli of the composites reinforced with ZrW 2 O 8 are found to increase with increasing filler loading. Furthermore, the various phase behaviors exhibited by ZrW 2 O 8 are also examined by differential scanning calorimetry measurements.

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Composite Materials with Adjustable Thermal Expansion for Electronic Applications

Cited by 28 publications

References 7 publications

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

Low Thermal Expansion Composites Prepared from Polyimide and ZrW<su>2O8 Particles with Negative Thermal Expansion

Zirconium tungstate reinforced cyanate ester composites with enhanced dimensional stability

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