Synthesis and characterization of geometrically tunable nano-size hollow silicate particles and their dip-coating prepared films for thermal management applications

RSC Advances ◽  
2015 ◽  
Vol 5 (126) ◽  
pp. 104408-104416 ◽  
Author(s):  
Raymond V. Rivera Virtudazo ◽  
Ye Lin ◽  
Rudder T. Wu
Keyword(s):  
Thermal Conductivity ◽  
Thermal Management ◽  
Dip Coating ◽  
Synthesis And Characterization ◽  
Thermal Insulating ◽  
Set Up ◽  
Insulating Properties ◽  
Nano Size ◽  
Xenon Flash

The thermal insulating properties of NHSPs were demonstrated by coating glass with NHSPs. A reduction of approximately 29.9% in thermal conductivity was observed, which was evaluated by a contactless approach using a xenon flash lamp set-up.

Sustainable materials with high insulation capacity obtained from wastes from hemp industry processed by wet-laid

2021 ◽  
pp. 004051752110460
Author(s):  
O Gutierrez-Moscardo ◽  
M Canet ◽  
J Gomez-Caturla ◽  
D Lascano ◽  
E Fages ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Textile Industry ◽  
Areal Density ◽  
Absorption Capacity ◽  
Thermal Insulating ◽  
Viscose Fibers ◽  
Sustainable Materials ◽  
The One ◽  
Insulating Properties

This article reports on the revalorization of hemp waste from the textile industry, focusing on the development of new sustainable materials with high insulating properties. Wet-laid technology was used to manufacture nonwovens with different binding fibers, polylactic acid, and viscose fibers. The characterization of the acoustic insulating capacity was carried out using a Kundt tube, and the thermal insulating performance by measuring the heat transmission resistance ( R) and thermal conductivity ( λ). The results showed that the developed nonwovens have lower thermal conductivity values of about 0.027–0.034 W/(m K), were even lower than those of traditional thermal insulating materials, being the sample with 100 g/m2 of areal density and with a composition of 80% of hemp, 10% of polylactide and 10% of viscose the one with the lowest thermal conductivity (0.027 W/(mK). Their acoustic absorption capacity was around 0.76 at a frequency of 6 kHz, in samples containing high hemp waste (>80 wt%). However, the heterogeneous, discontinuous, and high void density structure that contributes to excellent insulating properties, lead to a decrease in their mechanical properties. This demonstrated that these materials are suitable for substituting traditional materials in insulating applications. Additionally, antifungal tests were carried out. However, hemp nonwovens proved to be inefficient against fungal proliferation.

Synthesis and Physical Properties of Skutterudite Superlattices

2000 ◽  
Vol 626 ◽  
Author(s):  
Joshua R. Williams ◽  
David C. Johnson ◽  
Michael Kaeser ◽  
Terry Tritt ◽  
George Nolas ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Physical Properties ◽  
High Temperatures ◽  
Synthesis And Characterization ◽  
Superlattice Structure

ABSTRACTPredicted and observed reductions in thermal conductivity of materials with superlattice structure have prompted interesting research into the possibility of using these materials as higher efficiency thermoelectrics. Synthesis of superlattice materials is challenging however, as the structure itself is generally not very stable at high temperatures as it is prone to interdiffusion. Presented here is the successful synthesis and characterization of a superlattice composed of two materials with the skutterudite structure, IrSb3 and CoSb3.

Wrong expectation of superinsulation behavior from largely-expanded nanocellular foams

Nanoscale ◽  
2020 ◽  
Vol 12 (24) ◽  
pp. 13064-13085 ◽  
Author(s):  
Piyapong Buahom ◽  
Chongda Wang ◽  
Mohammed Alshrah ◽  
Guilong Wang ◽  
Pengjian Gong ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Cellular Structure ◽  
Thermal Insulating ◽  
Insulating Properties

This work aims to predict the thermal conductivity of microcellular and nanocellular thermal insulation foams to explore the correlation between the cellular structure and the thermal insulating properties.

Hydrothermal synthesis and characterization of hydroxyapatite and fluorhydroxyapatite nano-size powders

2010 ◽  
Vol 5 (4) ◽  
pp. 045004 ◽  
Author(s):  
Leila Montazeri ◽  
Jafar Javadpour ◽  
Mohammad Ali Shokrgozar ◽  
Shahin Bonakdar ◽  
Sayfoddin Javadian
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization ◽  
Nano Size
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