scholarly journals Control Technique of Solidus Temperature on Gold Base Solder for SiC Devices with High Temperature Operation

2014 ◽  
Vol 3 (4) ◽  
pp. 205-211 ◽  
Author(s):  
Hiroki TAKAHASHI ◽  
Hiroki TAKAHASHI ◽  
Yoshinori MURAKAMI ◽  
Yoshinori MURAKAMI ◽  
Takeshi ANZAI ◽  
...  
Keyword(s):  
High Temperature ◽  
Solidus Temperature ◽  
Control Technique ◽  
High Temperature Operation

High-Temperature Operation of Photonic-Crystal Lasers for On-Chip Optical Interconnection

2012 ◽  
Vol E95.C (7) ◽  
pp. 1244-1251 ◽  
Author(s):  
Koji TAKEDA ◽  
Tomonari SATO ◽  
Takaaki KAKITSUKA ◽  
Akihiko SHINYA ◽  
Kengo NOZAKI ◽  
...  
Keyword(s):  
High Temperature ◽  
Photonic Crystal ◽  
Optical Interconnection ◽  
On Chip ◽  
High Temperature Operation

KUBOTA UCX

Alloy Digest ◽  
2008 ◽  
Vol 57 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Performance ◽  
High Temperature Operation ◽  
Oxidation And Corrosion ◽  
Very High

Abstract Kubota UCX was developed for very high temperature operation for ethylene pyrolysis service. The alloy also has excellent oxidation and corrosion resistance. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as casting and joining. Filing Code: Ni-663. Producer or source: Kubota Metal Corporation, Fahramet Division.

scholarly journals Identification of Existing Challenges and Future Trends for the Utilization of Ammonia-Water Absorption–Compression Heat Pumps at High Temperature Operation

2021 ◽  
Vol 11 (10) ◽  
pp. 4635
Author(s):  
Marcel Ulrich Ahrens ◽  
Maximilian Loth ◽  
Ignat Tolstorebrov ◽  
Armin Hafner ◽  
Stephan Kabelac ◽  
...  
Keyword(s):  
High Temperature ◽  
Water Absorption ◽  
Industrial Sector ◽  
Heat Pumps ◽  
Working Fluid ◽  
Large Temperature ◽  
Future Trends ◽  
Ammonia Water ◽  
Starting Point ◽  
High Temperature Operation

Decarbonization of the industrial sector is one of the most important keys to reducing global warming. Energy demands and associated emissions in the industrial sector are continuously increasing. The utilization of high temperature heat pumps (HTHPs) operating with natural fluids presents an environmentally friendly solution with great potential to increase energy efficiency and reduce emissions in industrial processes. Ammonia-water absorption–compression heat pumps (ACHPs) combine the technologies of an absorption and vapor compression heat pump using a zeotropic mixture of ammonia and water as working fluid. The given characteristics, such as the ability to achieve high sink temperatures with comparably large temperature lifts and high coefficient of performance (COP) make the ACHP interesting for utilization in various industrial high temperature applications. This work reviews the state of technology and identifies existing challenges based on conducted experimental investigations. In this context, 23 references with capacities ranging from 1.4 kW to 4500 kW are evaluated, achieving sink outlet temperatures from 45 °C to 115 °C and COPs from 1.4 to 11.3. Existing challenges are identified for the compressor concerning discharge temperature and lubrication, for the absorber and desorber design for operation and liquid–vapor mixing and distribution and the choice of solution pump. Recent developments and promising solutions are then highlighted and presented in a comprehensive overview. Finally, future trends for further studies are discussed. The purpose of this study is to serve as a starting point for further research by connecting theoretical approaches, possible solutions and experimental results as a resource for further developments of ammonia-water ACHP systems at high temperature operation.

High-Temperature Operation Method for Image Pickup Tube

2021 ◽  
pp. 1-1
Author(s):  
Yoichiro Neo ◽  
Masato Nakata ◽  
Yukino Kameda ◽  
Yoshinori Hatanaka ◽  
Hidenori Mimura
Keyword(s):  
High Temperature ◽  
Operation Method ◽  
High Temperature Operation

Development of Laminar Plasma Shielded HF-ERW Process: Advanced Welding Process of HF-ERW 3

2012 ◽  
Author(s):  
Hideki Hamatani ◽  
Funinori Watanabe ◽  
Nobuo Mizuhashi ◽  
Sunao Takeuchi ◽  
Yoshiaki Hirota ◽  
...  
Keyword(s):  
High Temperature ◽  
Welding Process ◽  
Air Entrainment ◽  
Plasma Jets ◽  
Control Technique ◽  
Monitoring Methods ◽  
Line Pipe ◽  
Temperature State ◽  
Weld Area ◽  
Cold Gas

High frequency - electric resistance welded (HF-ERW) pipe has been successfully used for many years for a number of applications. The benefits of HF-ERW pipe are considerable, including a higher dimensional tolerance and lower prices than seamless pipe and UO pipe. The conventional weld seam produced by HF-ERW, however, often has a relatively low toughness. We have developed an automatic heat input control technique based on ERW phenomena that relies on optical and electrical monitoring methods and has been shown to result in a significant improvement in the toughness. Shielding of the weld area must also be considered as a key factor in the formation of a sound weld. It has been shown that an inert cold gas (e.g., at room temperature) shielding technique is effective for maintaining a stable low oxygen state in the weld area that inhibits the formation of penetrator, a pancake oxide inclusions. Compared to the cold gas shielding technique, high temperature gas shielding, due to its higher kinetic viscosity coefficient, should make it easier to sustain a higher laminar flow, thus leading to a rather low air entrainment in the shielding gas. In addition, plasma is a much higher temperature state (∼6000 K), and the dissociated gases can react with the entrained oxygen; plasma jets should, therefore, enhance the overall shielding effects. Moreover, oxides on the strip edges can be expected to melt and/or be reduced by the high temperature plasma jets. Nippon Steel has developed a plasma torch that can generate a long and wide laminar argon – nitrogen – (hydrogen) jet. This paper describes the results obtained from our investigation of the effects of a plasma jet shield on the weld area of high strength line pipe with a yield strength grade of X65. Preliminary attempts in applying this novel shielding technique has been found, as expected, to demonstrate extremely low numbers of weld defects and a good low temperature toughness of the HF-ERW seam.

High-temperature operation of GaN-based OPAMP on silicon substrate

2010 ◽  
Vol 7 (7-8) ◽  
pp. 1952-1954 ◽  
Author(s):  
Kazuki Nomoto ◽  
Kazuya Hasegawa ◽  
Tohru Nakamura
Keyword(s):  
High Temperature ◽  
Silicon Substrate ◽  
High Temperature Operation

High-temperature operation (70°C, 50 mW) of 660-nm-band InGaAlP Zn-diffused window lasers fabricated using highly Zn-doped GaAs layers

1999 ◽  
Vol 5 (3) ◽  
pp. 750-755 ◽  
Author(s):  
M. Watanabe ◽  
H. Shiozawa ◽  
O. Horiuchi ◽  
Y. Itoh ◽  
M. Okada ◽  
...  
Keyword(s):  
High Temperature ◽  
C 50 ◽  
High Temperature Operation

1.3 [micro sign]m InAsP/InAlGaAs MQW lasers for high-temperature operation

1997 ◽  
Vol 33 (12) ◽  
pp. 1048 ◽  
Author(s):  
T. Anan ◽  
M. Yamada ◽  
K. Tokutome ◽  
S. Sugou
Keyword(s):  
High Temperature ◽  
High Temperature Operation
Sign in / Sign up

Export Citation Format

Share Document