scholarly journals Evaluation of Thermal Control Material using Dielectric Multi-layer Film for Spacecraft

Netsu Bussei ◽  
2021 ◽  
Vol 35 (1) ◽  
pp. 5-11
Author(s):  
Kota Tomioka ◽  
Sumitaka Tachikawa ◽  
Yuji Nagasaka
Keyword(s):  
Thermal Control ◽  
Control Material ◽  
Layer Film ◽  
Multi Layer Film

Dynamics of an Electrified Multi-layer Film Down a Porous Incline

2020 ◽  
Vol 32 (6) ◽  
pp. 1211-1236
Author(s):  
Magdy A. Sirwah ◽  
Ahmed Assaf
Keyword(s):  
Layer Film ◽  
Multi Layer Film

Effect of Sr Doping on Structure and Emittance of La1-xSrxMnO3 Smart Thermal Control Films

2014 ◽  
Vol 602-603 ◽  
pp. 902-905
Author(s):  
Yong Jun Shen ◽  
Chuan Bin Wang ◽  
Ling Li ◽  
Qiang Shen ◽  
Lian Meng Zhang
Keyword(s):  
Thin Film ◽  
Smooth Surface ◽  
Pulsed Laser ◽  
Double Exchange ◽  
Thermal Control ◽  
Laser Deposition ◽  
Lanthanum Manganite ◽  
Infrared Emissivity ◽  
Control Material ◽  
Double Exchange Interaction

Sr-doped lanthanum manganite (La1-xSrxMnO3) is characteristic of thermochromic, which can act as a smart thermal control material used in the variable-emittance devices. In the present study, La1-xSrxMnO3 thin films were prepared on MgO(100) substrates by pulsed laser deposition, and the effect of Sr-doping (x = 0 ~ 0.4) on the structure and infrared emissivity was investigated. Single-phased La1-xSrxMnO3 films with (100)-orientation were obtained, which showed a dense texture with smooth surface. The ratio of Mn4+/Mn3+ in the films was increased with increasing Sr doping, leading to the enhancement in double-exchange interaction and electrical conductivity. As a result, the phase transition from metal to insulator was observed with the increasing of test temperature. For the La0.8Sr0.2MnO3 thin film, a large value of emittance (De = 0.28) was obtained, indicating good variable-emittance by appropriate Sr doping.

A Multi-layer Film Based Fiber Probe for Ultrasound Generation

2021 ◽  
Author(s):  
Geng Chen ◽  
Liuyang Yang ◽  
Dongchen Xu ◽  
Chenhao Dai ◽  
Zhijun Yan ◽  
...  
Keyword(s):  
Fiber Probe ◽  
Layer Film ◽  
Multi Layer Film

scholarly journals Preparation of Multi Layer Film by Plating Method.

Hyomen Kagaku ◽  
1993 ◽  
Vol 14 (9) ◽  
pp. 565-569 ◽  
Author(s):  
Tohru WATANABE ◽  
Masayuki KAKEGAWA
Keyword(s):  
Layer Film ◽  
Plating Method ◽  
Multi Layer Film

Femtosecond pulsed laser induced damage characteristics on Si-based multi-layer film

2019 ◽  
Vol 12 (2) ◽  
pp. 371-381
Author(s):  
郑长彬 ZHENG Chang-bin ◽  
邵俊峰 SHAO Jun-feng ◽  
李雪雷 LI Xue-lei ◽  
王化龙 WANG Hua-long ◽  
王春锐 WANG Chun-rui ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
Layer Film ◽  
Damage Characteristics ◽  
Laser Induced Damage ◽  
Multi Layer Film ◽  
Femtosecond Pulsed Laser

611 Analysis Technique of Melt Extrusion Process of a Multi-Layer Film(2)

2006 ◽  
Vol 2006 (0) ◽  
pp. _611-1_-_611-4_
Author(s):  
Yuji MATSUO ◽  
Yasuya NAKAYAMA ◽  
Toshihisa KAJIWARA
Keyword(s):  
Extrusion Process ◽  
Melt Extrusion ◽  
Layer Film ◽  
Analysis Technique ◽  
Multi Layer Film

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.

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