Aerogels for Insulation Applications

2021 ◽  
pp. 57-76
Keyword(s):  
Heat Insulation ◽  
Light Weight ◽  
Insulation Property ◽  
Insulating Material

Aerogels have been used as a heat insulating material for the last few decades and possess extremely remarkable qualities for heat insulation. The qualities like light weight (contains more air) and easy to blend with other materials make the aerogel a better insulator than any other material of this kind. The aerogel provides 2 to 3 times better insulation than the styrofoam which is also light weight. The insulating property gets enhanced, if the aerogel is a composite. The interesting details about the insulation property of aerogel will be explored in this chapter.

Performance of Thermal Insulation Reflective Composite Coatings

2011 ◽  
Vol 239-242 ◽  
pp. 1771-1774 ◽  
Author(s):  
Meng Qiu Jia ◽  
Yu Hong Jin
Keyword(s):  
Aqueous Solution ◽  
Thermal Insulation ◽  
Heat Insulation ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Insulation Property ◽  
Corrosion Properties ◽  
Rutile Titanium Dioxide ◽  
Insulation Performance ◽  
Good Heat

Reflective topcoat and thermal insulation mid-coat composite coatings system was used in this work. The effect of the content of the hollow glass micro-beads and rutile titanium dioxide on the heat insulation performance and the reflectivity of the coatings were investigated, respectively. The heat insulation performance and the reflectivity of the thermal insulation reflective composite coatings (TIRCCs) were characterized by self-prepared experimental device. The results showed the good heat insulation property, and the insulated temperature reached 12-15°C, and the reflectivity was up to 95%. The anti-corrosion and anti-penetration of the TIRCCs were studied by electrochemical impedance spectroscopy (EIS) technique. The results showed that the resistance of the TIRCCs still be maintained at 108Ω·cm2 after 30 days in the 3.5% aqueous solution of sodium chloride. So The TIRCCs can be used on the surface of the steal structure for decreasing the temperature and enhancing anti-corrosion properties.

Thermal Insulation Property of Newspaper Membrane Encased Soil-Based Aerated Lightweight Concrete Panels

2011 ◽  
Vol 261-263 ◽  
pp. 783-787 ◽  
Author(s):  
Soon Ching Ng ◽  
Kaw Sai Low ◽  
Ngee Heng Tioh
Keyword(s):  
Temperature Gradient ◽  
Thermal Insulation ◽  
Lightweight Concrete ◽  
Clayey Soil ◽  
Heat Insulation ◽  
Control Panel ◽  
Insulation Property ◽  
Concrete Panels ◽  
Thermal Insulation Property ◽  
Insulation Performance

Roof and wall are known to be responsible for heat entering into a building and should therefore be thermally insulated in order to lessen energy consumption required for air-conditioning. In this study, four soil-based aerated lightweight concrete (ALC) panels each measures 750 mm (length) x 750 mm (breadth) x 70 mm (thick) with different aerial intensity of newspaper membrane encased were produced and tested on their thermal insulation property. For environmental friendly and economy reasons, clayey soil was used in place of sand to produce the ALC panels and they were tested in the Thermal Laboratory for twenty hours. Temperature gradient was computed based on the surface temperature measured during the test. The results obtained indicated that newspaper membrane encased soil-based ALC panels have superior heat insulation performance compared to control panel in terms of temperature gradient. It is found that the temperature gradient increased from 1.92 °C/cm to 2.08 °C/cm or 8.3% higher than control panel with just merely 0.05 g/cm2 of newspaper membrane encased.

scholarly journals Langstroth hive construction with cement-vermiculite

2004 ◽  
Vol 61 (6) ◽  
pp. 573-578 ◽  
Author(s):  
Maria Cristina Affonso Lorenzon ◽  
Rodolfo Gonçalves Cidreira ◽  
Edmundo Henrique Ventura Rodrigues ◽  
Milton Sérgio Dornelles ◽  
Geraldo Pereira Jr
Keyword(s):  
Thermal Conductivity ◽  
Honey Bees ◽  
Production Cost ◽  
Low Cost ◽  
Thermal Control ◽  
Light Weight ◽  
Control Material ◽  
Insulating Material ◽  
Randomized Design ◽  
Completely Randomized Design

Exfoliated vermiculite is a light-weight and cheap product that, because of its thermal resistance, has become a valuable insulating material. With regard to its use in beekeeping, this research tested whether the box for honey bees constructed with cement-vermiculite mortar (CVM) presents physical characteristics similar to those of wood. The experiment was carried out at Seropédica, RJ, Brazil, for eight months. The cement-vermiculite mortar was compared with a control material (pinewood), in the construction of Langstroth boxes and boards, in a completely randomized design, with respect to thermal control, thermal conductivity and its capacity to absorb and lose water. The production cost for a CVM box was estimated. There were no internal temperature differences between CVM and wooden boxes. Thermal conductivity values for CVM and pinewood were similar. CVM absorbed more water and lost water faster than pinewood. Since CVM boxes can be easily constructed, at a low cost and with similar characteristics as traditional boxes, made of wood, the material can be recommended for use in non-migratory beekeeping.

scholarly journals Composite Foams Prepared through Hollow Glass Microspheres Assisted Bubbling

2013 ◽  
Vol 22 (1) ◽  
pp. 096369351302200
Author(s):  
Zhenguo An ◽  
Jingjie Zhang
Keyword(s):  
Heat Insulation ◽  
Cell Structure ◽  
Nucleating Agent ◽  
Glass Microspheres ◽  
Insulation Property ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Foaming Process ◽  
Composite Foams ◽  
Ammonium Hydrogen

Composite foamy structures were prepared through hollow glass microspheres (HGM) assisted bubbling of silicone rubber with ammonium hydrogen carbonate as the blowing agent. The presence of HGM not only favoured the foaming process (acted as nucleating agent for the formation of minute bubbles at the initial stage of the bubbling), but also bring heterogeneous close-cell bubbles with stable inorganic shells into the foamy structure, which played an important part in the improvement of the heat insulation property of the product. Compared to the foamy structures without HGM, The composite foamy structures possessed improved heat insulation and sound absorbing properties. This work provides an additional strategy to fabricate composite foams with tailored cell structure and properties.

Application of Aerogel in Building Energy-saving

2018 ◽  
Author(s):  
Shuo Hao ◽  
Bin Yan ◽  
Min Zhou
Keyword(s):  
Solid State ◽  
Construction Industry ◽  
Heat Insulation ◽  
Building Energy ◽  
Urgent Problem ◽  
Insulation Property ◽  
Building Energy Saving ◽  
Application Methods ◽  
Thermal Insulation Property ◽  
Bearing Structure

<p>Each year, China consumes more than 1.4×108t coal for supplying heat. However, an urgent problem is that a large percent of the heat is not fully used but lost to external through the windows, walls and roofs. The paper mainly talks about how to improve the thermal insulation property of the buildings by adopting aerogel in order to reduce the unnecessary consumption of coal. Aerogel is a solid-state material with a density lower than that of the air and extraordinary performances in heat insulation and fire resistance which can be seen in the fact that the temperature it can withstand is more than ten times than other common materials. This paper aims at studying the application of particle aerogels, plate aerogels, and glass aerogels in the construction industry. And some application methods of aerogel are put forward connected with CRTS slab, architectural glass and non-bearing structure.</p>

Effect of Particle Size on Properties of Novel Thermal Insulation Materials Synthesized by Molten Salt Method

2014 ◽  
Vol 602-603 ◽  
pp. 644-647 ◽  
Author(s):  
Xiao Jun Zhang ◽  
Jun Ding ◽  
Hong Xi Zhu ◽  
Cheng Ji Deng ◽  
Wen Jie Yuan
Keyword(s):  
Particle Size ◽  
Molten Salt ◽  
Bulk Density ◽  
Heat Insulation ◽  
Physical Property ◽  
Molten Salt Method ◽  
Light Weight ◽  
Insulation Materials ◽  
Effect Of Particle Size

Novel heat insulation materials were synthesized by molten salt method by using natural forsterite and NaSO4 molten salt. The insulation materials which have light weight and small size pore were obtained by using different particle size (44 μm, 74 μm and 250 μm) natural forsterite and NaSO4 molten salt at 1000 °C-1150 °C for 10 h after treating by distilled water. The effects of particle size of forsterite on phase composition, sintering porperties, physical property and microstructure were studied. The results showed that the main pahse in all samples was Mg2SiO4Fe2O3 and MgFe2O4 which indicate that the NaSO4 molten salt just play the role of Promoting particles sintering. The particle size of 74 μm have better bulk density and comprssive strength in all sample, at 1100 °C, the sample of bulk density is 1.54 g/cm3 and the apparent porosity is 0.498. In addition, the strength of the sample made of 44 μm forsterite materials was always higher than that used 74 μm forsterit, and was the lowest strength of sample used 250 μm forsterite.

Biomass conversion into blow-in heat insulation materials by steam explosion

Holzforschung ◽  
2017 ◽  
Vol 71 (7-8) ◽  
pp. 641-644 ◽  
Author(s):  
Martins Andzs ◽  
Ramunas Tupciauskas ◽  
Andris Veveris ◽  
Laura Andze ◽  
Janis Abolins ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Steam Explosion ◽  
Betula Pendula ◽  
Heat Insulation ◽  
Biomass Conversion ◽  
Silver Birch ◽  
Alnus Incana ◽  
Insulation Material ◽  
Insulating Material ◽  
Insulation Materials

AbstractThe study of converting grey alder (Alnus incana) chips and silver birch (Betula pendula) flakes – residues from plywood manufacture – into blow-in insulation material by steam explosion (SE) is reported. The SE was conducted at temperatures between 200 and 235°C, for 0–5 min at pressures between 16 and 32 MPa. The severity parameters (logR0) of the SE was calculated, from which logR0≈3.6 was the most appropriate for production of blow-in materials. Thermal conductivity of the obtained insulating material was found to be in the range of 0.053–0.057 W m−1·K−1.

Bonding Strength and Thermal Insulation Property of Thermal Barrier Coating with Nanometer Alumina Coated Zirconia

2018 ◽  
Vol 281 ◽  
pp. 558-563
Author(s):  
Zhong Zhou Yi ◽  
Min Lu ◽  
Ke Shan ◽  
Nan Li ◽  
Feng Rui Zhai ◽  
...  
Keyword(s):  
Thermal Barrier Coating ◽  
Thermal Insulation ◽  
Coating Thickness ◽  
Bonding Strength ◽  
Heat Insulation ◽  
Steel Substrate ◽  
Thermal Barrier ◽  
Insulation Property ◽  
Barrier Coating ◽  
Thermal Insulation Property

The thermal barrier coating samples of different thickness with alumina coated zirconia and zirconia as coating materials were prepared on the surface of heat resistant alloy steel substrate after activation treatment with NiCoCrAlY as adhesive transition layer by plasma spraying method and spray gun quick spraying process. The bonding strength and thermal insulation property of two kinds of ceramic coating with the same thickness were compared by the test results of bonding strength, high temperature heat insulation and microstructure, and the relationship between the coating thickness and heat insulation effect were investigated. The results indicate that the structure and property of thermal barrier coating using nanoAl2O3coated ZrO2-Y2O3powder are superior to that using single zirconia powder. The thermal insulation property of the thermal barrier coating increased with the increasing of coating thickness, and the advantage is more obvious with temperature increasing.

Producing Aluminum Foam Sandwich Panel by Melt Drag Process

2012 ◽  
Vol 706-709 ◽  
pp. 367-372 ◽  
Author(s):  
Shinichi Nishida ◽  
Hiroto Tanaka ◽  
M. Adachi ◽  
M. Motomura
Keyword(s):  
Aluminum Alloy ◽  
Porous Material ◽  
Energy Absorption ◽  
Aluminum Foam ◽  
Sandwich Panel ◽  
Heat Insulation ◽  
Casting Process ◽  
Light Weight ◽  
Alloy Strip ◽  
Superior Property

Aluminum foam is porous material and it is superior property which is light weight , absorption sound, heat insulation and energy absorption than other materials. In present the panel of aluminum foam sandwich panel to use as structural materials is adhered with adhesive or wax for adhesion. The aim of this study is to clarify producing conditions to make sandwich panel by melt drag process. Melt drag process is single roll strip casting process. Producing aluminum alloy strip and adhering foam are at a time.

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