Keyword: Conductivity

Briefs: Materials
Electrochemical Ultracapacitors Using Graphitic Nanostacks

Electrochemical ultracapacitors (ECs) have been developed using graphitic nanostacks as the electrode material. The advantages of this technology will be the reduction of device size due to superior power densities and relative powers compared to traditional activated carbon electrodes....

Research News: Lighting

A multinational team of scientists has developed a process for creating glass-based, inorganic LEDs that produce light in the ultraviolet range. The work is a step toward biomedical...

Briefs: Materials
Radiation Shielding System Using a Composite of Carbon Nanotubes Loaded With Electropolymers

Single-wall carbon nanotubes (SWCNTs) coated with a hydrogen-rich, electrically conducting polymer such as polyethylene, receive and dissipate a portion of incoming radiation pulse energy to electrical signals that are transmitted along the CNT axes, and...

Research News: Lighting
Oak Ridge National Laboratory, Oak Ridge, TN

Solar cells, light emitting diodes, displays and other electronic devices could get a bump in performance because of a discovery at the...

Briefs: Mechanical & Fluid Systems

The addition of the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) to the Mars Science Laboratory (MSL) Rover requires an...

Research News: Lighting

Researchers in the University of Toronto's Department of Materials Science & Engineering have developed what they say are the world’s most efficient organic light-emitting diodes (OLEDs) on plastic....

Briefs: Manufacturing & Prototyping
Improved Design and Fabrication of Hydrated-Salt Pills

A high-performance design, and fabrication and growth processes to implement the design, have been devised for encapsulating a hydrated salt in a container that both protects the salt and provides thermal conductance between the salt and the environment surrounding the container. The unitary...

Articles: Lighting

As global energy demand rises, the significant energy-saving potential of light-emitting diode (LED) lighting remains a top consideration for...

Briefs: Manufacturing & Prototyping
Technique for Configuring an Actively Cooled Thermal Shield in a Flight System

Broad area cooling shields are a massefficient alternative to conductively cooled thermal radiation shielding. The shield would actively intercept a large portion of incident thermal radiation and transport the heat away using cryogenic helium gas. The design concept...

Articles: Photonics/Optics

Unmanned aircraft systems (UAS) and their applications are experiencing rapid growth, especially in the area of remote sensing. Advances in propulsion; airframe materials;...

Application Briefs: Photonics/Optics

Fine laser cutting is an ideal technology for specialized cutting requirements found in the manufacturing of medical tube tools and components. From surgical instruments used in cutting and biopsy, to needles...

Briefs: Materials
Fiber-Reinforced Reactive Nano-Epoxy Composites

A family of metal/ceramic composite materials has been developed that are relatively inexpensive, lightweight alternatives to structural materials that are typified by beryllium, aluminum, and graphite/epoxy composites. These metal/ceramic composites were originally intended to replace beryllium...

Briefs: Materials
Metal-Matrix/Hollow-Ceramic-Sphere Composites

A family of metal/ceramic composite materials has been developed that are relatively inexpensive, lightweight alternatives to structural materials that are typified by beryllium, aluminum, and graphite/epoxy composites. These metal/ceramic composites were originally intended to replace beryllium...

Briefs: Lighting

Phosphors are useful in numerous applications including lighting. Tantalates are very promising materials because they are especially robust and resistant to chemical degradation. Studies have...

Briefs: Manufacturing & Prototyping

Thermoelectric materials provide a means for converting heat into electrical power using a fully solid-state device. Power-generating devices (which include individual...

Briefs: Physical Sciences

Acquiring cheap, moving video was impossible in a vacuum environment, due to camera overheating. This overheating is brought on by the lack of cooling media in vacuum. A water-jacketed camera cooler enclosure machined...

Articles: Materials

The Hall effect can be observed when the combination of a magnetic field through a sample and a current along the length of the sample create an...

Articles: Materials

In direct response to the National Research Council’s report “Capabilities for the Future: An Assessment of NASA Laboratories for Basic Research, 2010,” the Space Technology program was born and formally approved...

Briefs: Lighting

Phosphors are useful in numerous applications including imaging, detection, and lighting. They come in forms of thin films, monoliths, or powders for miscellaneous devices, or dispersible nano...

Techs for License: Lighting

Flexible, transparent, conducting coatings are of high commercial value in low-cost, flexible photovoltaic cells and large electronic LED displays. Currently, the carbon nanotubes...

Briefs: Manufacturing & Prototyping
Development of Position-Sensitive Magnetic Calorimeters for X-Ray Astronomy

Metallic magnetic calorimeters (MMC) are one of the most promising devices to provide very high energy resolution needed for future astronomical x-ray spectroscopy. MMC detectors can be built to large detector arrays having thousands of pixels. Position-sensitive...

Briefs: Mechanical & Fluid Systems

Airborne and space infrared cameras require highly flexible direct cooling of mechanically-sensitive focal planes. A thermal electric cooler is often used together with a thermal strap as a means to transport...

Briefs: Physical Sciences
Image Quality Indicator for Infrared Inspections

The quality of images generated during an infrared thermal inspection depends on many system variables, settings, and parameters to include the focal length setting of the IR camera lens. If any relevant parameter is incorrect or sub-optimal, the resulting IR images will usually exhibit inherent...

Briefs: Materials
Real-Time Deposition Monitor for Ultrathin Conductive Films

A device has been developed that can be used for the real-time monitoring of ultrathin (2 Å or more) conductive films. The device responds in less than two microseconds, and can be used to monitor film depositions up to about 60 Å thick. Actual thickness monitoring capability will...

Briefs: Electronics & Computers
Reliability of Ceramic Column Grid Array Interconnect Packages Under Extreme Temperatures

A paper describes advanced ceramic column grid array (CCGA) packaging interconnects technology test objects that were subjected to extreme temperature thermal cycles. CCGA interconnect electronic package printed wiring boards (PWBs) of polyimide were...

Application Briefs: Lighting
Kopp Glass, Pittsburgh, PA

Incandescent lamps have been used as the primary light source in airfield lighting designs for many years. With recent environmental awareness of the general population and...

Briefs: Manufacturing & Prototyping
Low-Dead-Volume Inlet for Vacuum Chamber

Gas introduction from near-ambient pressures to high vacuum traditionally is accomplished either by multi-stage differential pumping that allows for very rapid response, or by a capillary method that allows for a simple, single-stage introduction, but which often has a delayed response. Another means to...

Briefs: Physical Sciences
Correction for Self-Heating When Using Thermometers as Heaters in Precision Control Applications

In precision control applications, thermometers have temperature-dependent electrical resistance with germanium or other semiconductor material thermistors, diodes, metal film and wire, or carbon film resistors. Because resistance readout requires...

Briefs: Physical Sciences
Non-Contact Thermal Properties Measurement With Low-Power Laser and IR Camera System

As shown by the Phoenix Mars Lander’s Thermal and Electrical Conductivity Probe (TECP), contact measurements of thermal conductivity and diffusivity (using a modified flux-plate or line-source heat-pulse method) are constrained by a number of factors. Robotic...