scholarly journals The use of aluminum oxide as a sensor

2021 ◽  
Vol 2114 (1) ◽  
pp. 012010
Author(s):  
Aqeel Maryoosh Jary ◽  
Sadeq Naeem Atiyah ◽  
Ali Nazar Abbood ◽  
M. W. Alhamd
Keyword(s):  
High Temperature ◽  
Aluminum Oxide ◽  
Working Conditions ◽  
Anodic Alumina ◽  
Photoluminescence Properties ◽  
Mechanical Quality ◽  
Acidic Electrolyte ◽  
Charge States

Abstract The comes about of optical and photoluminescence properties of anodic alumina shaped within the acidic electrolyte and subjected to high-temperature warm treatment are depicted in article. It was found that the photoluminescence properties of anodic alumina decided by the oxygen opportunities with diverse values of the charge states and pollutions within the frame of corrosive buildups. As a premise of limit finders in terms of the mechanical quality the substrates shaped within the oxalic electrolyte and altered by warm treatment at 800 °C are preferred. Variations of plans dilatometric microrelays sensors of temperature based on anodic alumina are advertised. For different ranges of temperatures and working conditions ideal plans are chosen.

Multi-Function Manipulator

2012 ◽  
Vol 546-547 ◽  
pp. 1602-1607
Author(s):  
Zu Lin Wang ◽  
Jian Fei Ouyang ◽  
Qiang Fang ◽  
Yuan Liu
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Labor Productivity ◽  
Working Conditions ◽  
Deep Water ◽  
Industrial Robots ◽  
Labor Intensity ◽  
Model Design ◽  
Improve Working ◽  
Automation Level

This paper is for ordinary lathe supporting and design the capture of manipulator. Practice has proved, industrial robots can replace the hands of heavy labor, significantly reduce the labor intensity, improve working conditions, and improve labor productivity and automation level. In addition, it can be in high temperature, low temperature, deep water,cosmos, radioactive and other toxic, pollution environment conditions operation, more shows its superiority, with broad prospects. In the paper, the structure of the manipulator model design and Cortex-M0 micro controller (hereinafter referred to as M0) as the main controller in this paper. With multiple steering gear as the basis, make manipulator model, through the realization to the output M0 PWM control more than the steering gear, and finally achieve the acquirement manipulator workpiece, and the workpiece in designated spot.

Photoluminescence Properties of K1-xSr4(BO3)3∶xPr3+ Phosphors Prepared by High-Temperature Solid-State Method

2017 ◽  
Vol 37 (5) ◽  
pp. 0516001
Author(s):  
马诗章 Ma Shizhang ◽  
冯文林 Feng Wenlin ◽  
彭志清 Peng Zhiqing
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Photoluminescence Properties ◽  
Solid State Method ◽  
State Method

scholarly journals Tensile Behaviors of Lap-Spliced Carbon Fiber-Textile Reinforced Mortar Composites Exposed to High Temperature

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1512 ◽  
Author(s):  
Gia Toai Truong ◽  
Sung-Ho Park ◽  
Kyoung-Kyu Choi
Keyword(s):  
High Temperature ◽  
Carbon Fiber ◽  
Aluminum Oxide ◽  
Surface Treatment ◽  
Ultimate Strain ◽  
Oxide Powder ◽  
Peak Strength ◽  
Lap Splice ◽  
Aluminum Oxide Powder ◽  
Textile Reinforced Mortar

The tensile behaviors of textile-reinforced mortar (TRM) composites made with carbon fiber textile and alumina cement-based mortar were investigated through direct tensile tests. Three different surface treatment details in the lap splice area were used to improve the tensile behaviors of the TRM composites: carbon fiber textile impregnated by epoxy, carbon fiber textile coated with aluminum oxide powder following epoxy impregnation, and carbon fiber textile coated with aluminum oxide powder following both carbon fiber fabric attachment and epoxy impregnation. Three different lap splice lengths were used 180, 200, and 220 mm. In addition, the tensile properties of TRM composites following exposure to high temperature were investigated as well. In this test, TRM test specimens were exposed to two different temperature histories with maximum values of 250 and 350 °C. The results of the test specimens according to the test parameters were analyzed in terms of initial stiffness, cracking strength, corresponding strain at cracking, modulus of elasticity in the cracked stage, peak strength, and ultimate strain. The influence of lap splice length on the tensile behaviors of the TRM composites was analyzed and discussed. The surface treatment in the overlapping region showed ductile behavior and resulted in a significant improvement of the peak strength and ultimate strain over the untreated lap splice textile. Following exposure to high temperature, the TRM composites showed a reduction of tensile responses compared to those cured at room temperature. In addition, a prediction model developed in the previous study was used to predict the tensile behaviors of the lap-spliced carbon fiber-textile reinforced mortar composites exposed to high temperature, and the prediction by the model showed a good agreement with the experimental results.

scholarly journals Properties of high-temperature melts using levitation

2000 ◽  
Vol 72 (11) ◽  
pp. 2127-2136 ◽  
Author(s):  
Paul C. Nordine ◽  
J. K. Richard Weber ◽  
Johan G. Abadie
Keyword(s):  
High Temperature ◽  
Aluminum Oxide ◽  
High Temperatures ◽  
Yttrium Aluminum Oxide ◽  
Yttrium Aluminum ◽  
And Behavior ◽  
Oxide Melts

Containerless conditions allow well-controlled investigation of liquids at high temperatures. Levitation methods used for this purpose are reviewed, and their application is illustrated by discussion of the properties and behavior of deeply undercooled yttrium-aluminum-oxide melts.

Experimental Investigation of a Miniature Ejector Using Water as Working Fluid

2020 ◽  
Vol 12 (6) ◽  
Author(s):  
Jingming Dong ◽  
Qiuyu Hu ◽  
Yuxin Xia ◽  
He Song ◽  
Hongbin Ma ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Temperature ◽  
Working Conditions ◽  
Thermal Energy ◽  
Nozzle Exit ◽  
Cooling System ◽  
Area Ratio ◽  
Coefficient Of Performance ◽  
Working Fluid ◽  
Condensing Pressure

Abstract This paper presents an experimental investigation of a miniature ejector using water as the working fluid. The investigated ejector cooling system can utilize the thermal energy to be removed to power the cooling system and maintain the temperature of an electronic component below ambient temperature. The effects of working conditions, nozzle exit position (NXP), and area ratio on the coefficient of performance (COP) of ejector performance were investigated. Experimental results show that the miniature ejector can function well when the temperature in the high-temperature evaporator (HTE) ranges from 55 °C to 70 °C and can achieve a COP (coefficient of performance) of 0.66. With an increase of the NXP, the COP decreases, while the critical condensing pressure first increases and then decreases. As the area ratio of the miniature ejector increases, the COP increases, and the critical condensing pressure decreases.

scholarly journals High-Pressure Synthesis, Crystal Structure, and Photoluminescence Properties of β-Y2B4O9:Eu3+

Inorganics ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 136
Author(s):  
Fuchs ◽  
Schröder ◽  
Heymann ◽  
Jüstel ◽  
Huppertz
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
Photoluminescence Properties ◽  
Triclinic Space Group ◽  
Space Group ◽  
High Pressure High Temperature ◽  
Temperature Experiment ◽  
Pressure Synthesis

A high-pressure/high-temperature experiment at 7.5 GPa and 1673 K led to the formation of the new compound βY2B4O9. In contrast to the already known polymorph αY2B4O9, which crystallizes in the space group C2/c, the reported structure could be solved via single-crystal Xray diffraction in the triclinic space group P1 (no. 2) and is isotypic to the already known lanthanide borates βDy2B4O9 and βGd2B4O9. Furthermore, the photoluminescence of an europium doped sample of βY2B4O9:Eu3+ (8%) was investigated.

Formation of aluminum oxide scales in sulfur-containing high temperature environments

1985 ◽  
Vol 16 (11) ◽  
pp. 2051-2059 ◽  
Author(s):  
T. T. Huang ◽  
R. Richter ◽  
Y. L. Chang ◽  
E. Pfender
Keyword(s):  
High Temperature ◽  
Aluminum Oxide ◽  
Oxide Scales ◽  
Sulfur Containing
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