Effect of alumina addition on the phase evolution and thermal conductivity of ZrO2–NdO1.5 ceramics

2009 ◽  
Vol 468 (1-2) ◽  
pp. 350-355 ◽  
Author(s):  
Zhan-Guo Liu ◽  
Jia-Hu Ouyang ◽  
Yu Zhou ◽  
Jing Li
Keyword(s):  
Thermal Conductivity ◽  
Phase Evolution ◽  
Alumina Addition

Thermal Characterisation of Thermoset Polyester Resin Filled Recycle Expanded Polystyrene Composite with Aerogel and Alumina Additives

2013 ◽  
Vol 664 ◽  
pp. 600-604 ◽  
Author(s):  
Syed Anas Bin Syed Mustafa ◽  
Rahmah Mohamed ◽  
Nor Zaini Ikrom Zakaria ◽  
Husni Bin Rustam
Keyword(s):  
Thermal Conductivity ◽  
Silica Aerogel ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Expanded Polystyrene ◽  
Thermal Probe ◽  
K Value ◽  
Weight Percentage ◽  
Infrared Reflection ◽  
Alumina Addition

The preparation and characterization of Unsaturated Polyester Resin (UPR) filled recycled Expanded Polystyrene (EPS) composite systems were systematically investigated. Additives such as Alumina and silica aerogel powder were added to the composite for Infrared reflection and insulation enhancement. The effect of differing alumina weight percentage on the thermal properties, i.e. thermal conductivity and glass transition temperature, Tg were determined. The fabricated composite undergoes thermal analysis by using a DSC and a hand-held thermal probe, and characterized by a FTIR. There is little variation of the Tg across the samples tested. Specific heat capacity, cp from the DSC thermogram was significantly affected by incorporation of silica aerogel; 565 J/kgK compared to the unfilled sample result of 1706 kJ/kg. The thermal conductivity showed a minimum at 0.147 W m-1 K-1 from integrated silica aerogel only sample, and alumina addition increases the thermal conductivity above the minimum k value in the ranges 0.227-0.313 W m-1 K-1. Alternative Cp values from the thermal probe followed similar trend as the DSC Cp. Thermal diffusivity from the probe also showed an increase upon silica aerogel and alumina incorporation.

HARDNESS AND THERMAL CONDUCTIVITY OF As-Se-Te CHALCOGENIDE GLASSES

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-931-C4-934 ◽  
Author(s):  
M. F. Kotkata ◽  
M.B. El-den
Keyword(s):  
Thermal Conductivity ◽  
Chalcogenide Glasses

A STUDY OF THE Pb PRECIPITATION IN NaCl FROM THERMAL CONDUCTIVITY EXPERIMENTS

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-893-C6-895
Author(s):  
M. Locatelli ◽  
R. Suchail ◽  
E. Zecchi
Keyword(s):  
Thermal Conductivity

THEORY OF THERMAL CONDUCTIVITY IN MOLECULAR CRYSTALS, APPLICATION TO ALCALI CYANIDES

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-247-C6-249 ◽  
Author(s):  
W. Bauernfeind ◽  
J. Keller ◽  
U. Schröder
Keyword(s):  
Thermal Conductivity ◽  
Molecular Crystals

The influence of the addition of ground olive stone on the thermo-mechanical behavior of compressed earth blocks

2020 ◽  
Vol 108 (2) ◽  
pp. 203
Author(s):  
Samia Djadouf ◽  
Nasser Chelouah ◽  
Abdelkader Tahakourt
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Mechanical Behavior ◽  
Agricultural Waste ◽  
Hydraulic Press ◽  
Dry Density ◽  
Olive Stone ◽  
Compressed Earth Blocks ◽  
Clay Matrix ◽  
Earth Blocks

Sustainable development and environmental challenges incite to valorize local materials such as agricultural waste. In this context, a new ecological compressed earth blocks (CEBS) with addition of ground olive stone (GOS) was proposed. The GOS is added as partial clay replacement in different proportions. The main objective of this paper is to study the effect of GOS levels on the thermal properties and mechanical behavior of CEB. We proceeded to determining the optimal water content and equivalent wet density by compaction using a hydraulic press, at a pressure of 10 MPa. The maximum compressive strength is reached at 15% of the GOS. This percentage increases the mechanical properties by 19.66%, and decreases the thermal conductivity by 37.63%. These results are due to the optimal water responsible for the consolidation and compactness of the clay matrix. The substitution up to 30% of GOS shows a decrease of compressive strength and thermal conductivity by about 38.38% and 50.64% respectively. The decrease in dry density and thermal conductivity is related to the content of GOS, which is composed of organic and porous fibers. The GOS seems promising for improving the thermo-mechanical characteristics of CEB and which can also be used as reinforcement in CEBS.

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