High-performance cyanate ester composites with plasma-synthesized MgSiO3-SiO2-hBN powders for thermally conductive and dielectric properties

2019 ◽  
Vol 45 (5) ◽  
pp. 6491-6498 ◽  
Author(s):  
Youcha Zhang ◽  
Chengchang Jia
Keyword(s):  
Dielectric Properties ◽  
High Performance ◽  
Cyanate Ester ◽  
Thermally Conductive

Dielectric and Hot/Wet Properties of Methyl-Silsesquioxane/Cyanate Ester Resin Hybrid Materials

2011 ◽  
Vol 216 ◽  
pp. 630-634
Author(s):  
Zeng Ping Zhang ◽  
Yong Wen ◽  
Hong Zhao Du ◽  
Jian Zhong Pei ◽  
Shuan Fa Chen
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
High Performance ◽  
Printed Circuit Board ◽  
Cyanate Ester ◽  
Circuit Board ◽  
Printed Circuit ◽  
Cyanate Ester Resin ◽  
Properties Of Materials

Methylsilsesquioxane (Me-SSQ) was incorporated into cyanate ester resin (CE) to obtain organic-inorganic hybrids with better dielectric properties in this study. First, methyltriethoxysilane was hydrolyzed and condensed to synthesize Me-SSQ. Then several Me-SSQ/CE hybrids containing different contents of Me-SSQ were prepared. The effect of Me-SSQ content on the dielectric and hot/wet properties of materials was investigated. Results showed that the Me-SSQ/CE hybrid containing 20wt% of Me-SSQ shows a dielectric constant of 2.78, which is much lower than the pure CE resin. At the same time, the dielectric loss of the Me-SSQ/CE hybrids was slightly increased (tanδ<0.006). It indicates that Me-SSQ/CE hybrid is a promising matrix materials for high-performance printed circuit board (PCB).

Simultaneously toughening and strengthening cyanate ester resin with better dielectric properties by building nanostructures in its crosslinked network using polyimide-block-polysiloxane rod-coil block copolymers

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 49436-49447 ◽  
Author(s):  
Yayi Ye ◽  
Li Yuan ◽  
Guozheng Liang ◽  
Aijuan Gu
Keyword(s):  
Dielectric Properties ◽  
Block Copolymers ◽  
High Performance ◽  
Cyanate Ester ◽  
Cyanate Ester Resin ◽  
Cyanate Ester Resins

The fabrication and origin of high performance cyanate ester resins by building nanostructures in its crosslinked network with polyimide-block-polysiloxane block copolymers.

scholarly journals Polycrystalline SnSe with a thermoelectric figure of merit greater than the single crystal

2021 ◽  
Author(s):  
Chongjian Zhou ◽  
Yong Kyu Lee ◽  
Yuan Yu ◽  
Sejin Byun ◽  
Zhong-Zhen Luo ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Single Crystal ◽  
High Performance ◽  
Figure Of Merit ◽  
Waste Heat ◽  
Electric Energy ◽  
Cost Effective ◽  
Tin Selenide ◽  
Tin Oxides ◽  
Thermally Conductive

AbstractThermoelectric materials generate electric energy from waste heat, with conversion efficiency governed by the dimensionless figure of merit, ZT. Single-crystal tin selenide (SnSe) was discovered to exhibit a high ZT of roughly 2.2–2.6 at 913 K, but more practical and deployable polycrystal versions of the same compound suffer from much poorer overall ZT, thereby thwarting prospects for cost-effective lead-free thermoelectrics. The poor polycrystal bulk performance is attributed to traces of tin oxides covering the surface of SnSe powders, which increases thermal conductivity, reduces electrical conductivity and thereby reduces ZT. Here, we report that hole-doped SnSe polycrystalline samples with reagents carefully purified and tin oxides removed exhibit an ZT of roughly 3.1 at 783 K. Its lattice thermal conductivity is ultralow at roughly 0.07 W m–1 K–1 at 783 K, lower than the single crystals. The path to ultrahigh thermoelectric performance in polycrystalline samples is the proper removal of the deleterious thermally conductive oxides from the surface of SnSe grains. These results could open an era of high-performance practical thermoelectrics from this high-performance material.

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