scholarly journals High-temperature MEMS Heater Platforms: Long-term Performance of Metal and Semiconductor Heater Materials

Sensors ◽  
2006 ◽  
Vol 6 (4) ◽  
pp. 405-419 ◽  
Author(s):  
Jan Spannhake ◽  
Olaf Schulz ◽  
Andreas Helwig ◽  
Angelika Krenkow ◽  
Gerhard Müller ◽  
...  
Keyword(s):  
High Temperature ◽  
Mems Heater ◽  
Long Term Performance ◽  
Term Performance

A High Temperature and UV Stable Vapor Phase Polymer for Electronics Applications

2011 ◽  
Vol 2011 (HITEN) ◽  
pp. 000207-000214
Author(s):  
Rakesh Kumar
Keyword(s):  
High Temperature ◽  
Electronic Devices ◽  
Electronics Industry ◽  
Performance Requirements ◽  
Cell Components ◽  
Temperature Exposure ◽  
Electronic Parts ◽  
Long Term Performance ◽  
Term Performance

A recent development in the area of high temperature and UV stable polymers, which offers solutions to many existing packaging and reliability challenges of electronics industry, is described. Packaging, protection and reliability of various electronic devices and component, including PCB's, MEMS, optoelectronic devices, fuel cell components and nano-electronic parts are, becoming more challenging due to their long-term performance requirements. This high temperature polymer, named Parylene HT, offers solutions to many existing protective, packaging and reliability issues in the electronics and medical industries, in part because of its excellent electrical and mechanical properties, chemical inertness and long-term thermal stability at high temperature exposure (up to 350°C long-term and short-term at 450 °C). Experimental results and trial runs demonstrate the ability of Parylene HT coating to meet the growing requirements of higher dielectric capabilities, higher temperature integrity, mechanical processing, etc. of a dynamic electronics industry. In addition, Parylene HT polymer coating truly conforms to parts due to its molecular level deposition characteristics. Its suitability and biocompatibility encourage researchers to explore Parylene HT's role in sensors and in active electronic devices for various industries.

Metallurgy and Behavior of Alloys for Reformer Furnaces

2007 ◽  
Author(s):  
Carl E. Jaske
Keyword(s):  
High Temperature ◽  
Material Properties ◽  
Material Behavior ◽  
High Temperature Creep ◽  
Centrifugally Cast ◽  
Resistance To Oxidation ◽  
Long Term Performance ◽  
And Behavior ◽  
Term Performance

This paper reviews the metallurgy and behavior of centrifugally cast heat-resistant alloys for ammonia, methanol, and hydrogen reformer furnaces. The alloys include HK and HP, as well as proprietary versions of these materials produced by various foundries. Alloying and metallurgical factors that affect resistance to oxidation, carburization, and high temperature creep are discussed. Examples of the effects of environment and temperature on material behavior are provided. Finally, the use of material properties to predict the long-term performance of reformer furnace components is reviewed.

Improved Long Term Performance Stability of Sr-Fe-O Infiltrated LSM/YSZ Solid Oxide Fuel Cells under High Steam and High Temperature

2018 ◽  
Vol 85 (13) ◽  
pp. 1277-1287 ◽  
Author(s):  
Yueying Fan ◽  
Yun Chen ◽  
Harry Abernathy ◽  
Richard Pineault ◽  
Xueyan Song ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Long Term Performance ◽  
Term Performance

Syntactic Foam Thermal Insulation for Ultradeep High Temperature Applications

2002 ◽  
Author(s):  
Wen-Tsuen Wang ◽  
Lou Watkins
Keyword(s):  
High Temperature ◽  
Laboratory Test ◽  
Continuous Flow ◽  
Oil And Gas ◽  
Syntactic Foam ◽  
New Materials ◽  
The Past ◽  
Long Term Performance ◽  
Term Performance

This paper addresses a major challenge facing deepwater production of oil and gas: how to assure continuous flow of product under the pressures and temperatures found on the ocean floor. Syntactic foam promises to overcome the limitations exhibited by conventional insulation materials in the past. New hybrid glass and polymer chemistries with improved “hot, wet” performance survive in conditions that were formerly thought impossible. This paper presents the latest laboratory test data on these new materials, and proposes models for predicting long-term performance.

Long Term Behaviour of Stuffing Box Packings Under the Influence of Fluids at High Temperature

2009 ◽  
Author(s):  
Hans Kockelmann ◽  
Jaroslav Bartonicek ◽  
Eberhard Roos ◽  
Rolf Hahn ◽  
Werner Ottens
Keyword(s):  
High Temperature ◽  
Hot Water ◽  
Testing Techniques ◽  
Number Of Cycles ◽  
Assembly Procedure ◽  
Long Term Performance ◽  
Heating Up ◽  
Flexible Graphite ◽  
Term Performance

Testing techniques were developed to investigate the long-term behaviour of stuffing box packings under real service conditions. This equipment meets all requirements for the simulation of high temperature applications with gaseous fluids, hot water and steam: • controlled pre-tightening (gland load); • variation of the stiffness of the assembly (e.g. Bellville springs); • determination and monitoring of packing stress - respective gland load; • control of stroke and stem force; • heating-up, pressurization and temperature control; • conditioning of water and steam chemistry. All relevant influencing parameters on the long-term behaviour of varied stuffing box packings based on flexible Graphite, woven PTFE fibres and special packing designs were taken into consideration: • assembly procedure (packing stress); • stroke and number of cycles; • effect of Bellville springs; • medium and temperature. In detail, friction, relaxation and leakage tests were carried out. On the basis of these results an evaluation of the long-term performance of the different packing types based on Graphite and PTFE is possible.

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