Synergistic enhancement of thermal conductivity and dielectric properties in Al 2 O 3 /BaTiO 3 /PP composites

Junlong Yao, Li Hu, Min Zhou, Feng You, Xueliang Jiang, Lin Gao, Qing Wang, Zhengguang Sun, Jun Wang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Multifunctional polymer composites with both high dielectric constants and high thermal conductivity are urgently needed by high-temperature electronic devices and modern microelectromechanical systems. However, high heat-conduction capability or dielectric properties of polymer composites all depend on high-content loading of different functional thermal-conductive or high-dielectric ceramic fillers (every filler volume fraction ≥ 50%, i.e., f filler ≥ 50%), and an overload of various fillers (f thermal-conductive filler + f high-dielectric filler > 50%) will decrease the processability and mechanical properties of the composite. Herein, series of alumina/barium titanate/polypropylene (Al 2 O 3 /BT/PP) composites with high dielectric- and high thermal-conductivity properties are prepared with no more than 50% volume fraction of total ceramic fillers loading, i.e., f fillers ≤ 50%. Results showed the thermal conductivity of the Al 2 O 3 /BT/PP composite is up to 0.90 W/mcK with only 10% thermal-conductive Al 2 O 3 filler, which is 4.5 times higher than the corresponding Al 2 O 3 /PP composites. Moreover, higher dielectric strength (E b ) is also found at the same loading, which is 1.6 times higher than PP, and the Al 2 O 3 /BT/PP composite also exhibited high dielectric constant (ε r = 18 at 1000 Hz) and low dielectric loss (tan δ ≤ 0.030). These excellent performances originate from the synergistic mechanism between BaTiO3 macroparticles and Al 2 O 3 nanoparticles.

Original languageEnglish (US)
Article number1536
JournalMaterials
Volume11
Issue number9
DOIs
StatePublished - Aug 26 2018

Fingerprint

Dielectric properties
Fillers
Thermal conductivity
Composite materials
Volume fraction
Polymers
Permittivity
Barium titanate
Aluminum Oxide
Polypropylenes
Dielectric losses
Heat conduction
MEMS
Alumina
Nanoparticles
Mechanical properties
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Yao, Junlong ; Hu, Li ; Zhou, Min ; You, Feng ; Jiang, Xueliang ; Gao, Lin ; Wang, Qing ; Sun, Zhengguang ; Wang, Jun. / Synergistic enhancement of thermal conductivity and dielectric properties in Al 2 O 3 /BaTiO 3 /PP composites In: Materials. 2018 ; Vol. 11, No. 9.
@article{08773a83ddf6436ba5a52c805519f74c,
title = "Synergistic enhancement of thermal conductivity and dielectric properties in Al 2 O 3 /BaTiO 3 /PP composites",
abstract = "Multifunctional polymer composites with both high dielectric constants and high thermal conductivity are urgently needed by high-temperature electronic devices and modern microelectromechanical systems. However, high heat-conduction capability or dielectric properties of polymer composites all depend on high-content loading of different functional thermal-conductive or high-dielectric ceramic fillers (every filler volume fraction ≥ 50{\%}, i.e., f filler ≥ 50{\%}), and an overload of various fillers (f thermal-conductive filler + f high-dielectric filler > 50{\%}) will decrease the processability and mechanical properties of the composite. Herein, series of alumina/barium titanate/polypropylene (Al 2 O 3 /BT/PP) composites with high dielectric- and high thermal-conductivity properties are prepared with no more than 50{\%} volume fraction of total ceramic fillers loading, i.e., f fillers ≤ 50{\%}. Results showed the thermal conductivity of the Al 2 O 3 /BT/PP composite is up to 0.90 W/mcK with only 10{\%} thermal-conductive Al 2 O 3 filler, which is 4.5 times higher than the corresponding Al 2 O 3 /PP composites. Moreover, higher dielectric strength (E b ) is also found at the same loading, which is 1.6 times higher than PP, and the Al 2 O 3 /BT/PP composite also exhibited high dielectric constant (ε r = 18 at 1000 Hz) and low dielectric loss (tan δ ≤ 0.030). These excellent performances originate from the synergistic mechanism between BaTiO3 macroparticles and Al 2 O 3 nanoparticles.",
author = "Junlong Yao and Li Hu and Min Zhou and Feng You and Xueliang Jiang and Lin Gao and Qing Wang and Zhengguang Sun and Jun Wang",
year = "2018",
month = "8",
day = "26",
doi = "10.3390/ma11091536",
language = "English (US)",
volume = "11",
journal = "Materials",
issn = "1996-1944",
publisher = "MDPI AG",
number = "9",

}

Synergistic enhancement of thermal conductivity and dielectric properties in Al 2 O 3 /BaTiO 3 /PP composites . / Yao, Junlong; Hu, Li; Zhou, Min; You, Feng; Jiang, Xueliang; Gao, Lin; Wang, Qing; Sun, Zhengguang; Wang, Jun.

In: Materials, Vol. 11, No. 9, 1536, 26.08.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Synergistic enhancement of thermal conductivity and dielectric properties in Al 2 O 3 /BaTiO 3 /PP composites

AU - Yao, Junlong

AU - Hu, Li

AU - Zhou, Min

AU - You, Feng

AU - Jiang, Xueliang

AU - Gao, Lin

AU - Wang, Qing

AU - Sun, Zhengguang

AU - Wang, Jun

PY - 2018/8/26

Y1 - 2018/8/26

N2 - Multifunctional polymer composites with both high dielectric constants and high thermal conductivity are urgently needed by high-temperature electronic devices and modern microelectromechanical systems. However, high heat-conduction capability or dielectric properties of polymer composites all depend on high-content loading of different functional thermal-conductive or high-dielectric ceramic fillers (every filler volume fraction ≥ 50%, i.e., f filler ≥ 50%), and an overload of various fillers (f thermal-conductive filler + f high-dielectric filler > 50%) will decrease the processability and mechanical properties of the composite. Herein, series of alumina/barium titanate/polypropylene (Al 2 O 3 /BT/PP) composites with high dielectric- and high thermal-conductivity properties are prepared with no more than 50% volume fraction of total ceramic fillers loading, i.e., f fillers ≤ 50%. Results showed the thermal conductivity of the Al 2 O 3 /BT/PP composite is up to 0.90 W/mcK with only 10% thermal-conductive Al 2 O 3 filler, which is 4.5 times higher than the corresponding Al 2 O 3 /PP composites. Moreover, higher dielectric strength (E b ) is also found at the same loading, which is 1.6 times higher than PP, and the Al 2 O 3 /BT/PP composite also exhibited high dielectric constant (ε r = 18 at 1000 Hz) and low dielectric loss (tan δ ≤ 0.030). These excellent performances originate from the synergistic mechanism between BaTiO3 macroparticles and Al 2 O 3 nanoparticles.

AB - Multifunctional polymer composites with both high dielectric constants and high thermal conductivity are urgently needed by high-temperature electronic devices and modern microelectromechanical systems. However, high heat-conduction capability or dielectric properties of polymer composites all depend on high-content loading of different functional thermal-conductive or high-dielectric ceramic fillers (every filler volume fraction ≥ 50%, i.e., f filler ≥ 50%), and an overload of various fillers (f thermal-conductive filler + f high-dielectric filler > 50%) will decrease the processability and mechanical properties of the composite. Herein, series of alumina/barium titanate/polypropylene (Al 2 O 3 /BT/PP) composites with high dielectric- and high thermal-conductivity properties are prepared with no more than 50% volume fraction of total ceramic fillers loading, i.e., f fillers ≤ 50%. Results showed the thermal conductivity of the Al 2 O 3 /BT/PP composite is up to 0.90 W/mcK with only 10% thermal-conductive Al 2 O 3 filler, which is 4.5 times higher than the corresponding Al 2 O 3 /PP composites. Moreover, higher dielectric strength (E b ) is also found at the same loading, which is 1.6 times higher than PP, and the Al 2 O 3 /BT/PP composite also exhibited high dielectric constant (ε r = 18 at 1000 Hz) and low dielectric loss (tan δ ≤ 0.030). These excellent performances originate from the synergistic mechanism between BaTiO3 macroparticles and Al 2 O 3 nanoparticles.

UR - http://www.scopus.com/inward/record.url?scp=85052494318&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85052494318&partnerID=8YFLogxK

U2 - 10.3390/ma11091536

DO - 10.3390/ma11091536

M3 - Article

VL - 11

JO - Materials

JF - Materials

SN - 1996-1944

IS - 9

M1 - 1536

ER -