THERMAL CONDUCTIVITY AND Thermal DIFFUSIVITY - 20 Pages

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Catalogue excerpts

New Castle, DE USA Lindon, UT USA Hüllhorst, Germany Shanghai, China Beijing, China Tokyo, Japan Seoul, South Korea Taipei, Taiwan Bangalore, India Sydney, Australia Guangzhou, China Eschborn, Germany Wetzlar, Germany Brussels, Belgium Etten-Leur, Netherlands Paris, France Elstree, United Kingdom Barcelona, Spain Milano, Italy Warsaw, Poland Prague, Czech Republic Sollentuna, Sweden Copenhagen, Denmark Chicago, IL USA São Paulo, Brazil Mexico City, Mexico Montreal, Canada

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thermal conductivity and thermal diffusivity Thermal conductivity, thermal diffusivity and specific heat capacity define a material’s ability to store and transfer heat. Thorough understanding of these properties is critical for any process or material which experiences a large or fast temperature gradient, or for which the tolerance for temperature change is exacting. Accurate values of these properties are essential for modeling and managing heat, whether the component of interest is called on to insulate, conduct, or simply withstand temperature changes. Information about these properties is...

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thermal diffusivity by the Flash Method Thermal Conductivity Thermal diffusivity is the thermophysical property that defines Thermal Diffusivity the speed of heat propagation by conduction during changes of temperature. The higher the thermal diffusivity, the faster the heat propagation. The thermal diffusivity is related to the thermal conductivity, specific heat capacity and density. Specific Heat Capacity Energy Pulse The most effective method used for measuring thermal diffusivity is the flash method. This transient technique features Front Face short measurement times, is completely non-destructive,...

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Focusing Lens Autosampler Furnace Sample Sample Thermocouple Wave Guide Optics Reflective Optics High Speed Xenon-pulse Delivery Source Flash Method

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discovery laser flash DLF-1200 The Discovery Laser Flash system is the benchmark for highperformance laser flash analysis over a wide range of test temperatures. The flash source module consists of a custom Class 1 Nd:Glass Laser pulse source which provides a collimated, monochromatic energy pulse with a 300 μs to 400 μs pulse width. The DLF-1200 is ideal for labs that need to measure thermal conductivity, thermal diffusivity or heat capacity of specimens at temperatures up to 1200 °C, or that require the monochromatic pulse inherent with a laser source in a compact benchtop footprint. Transient...

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Radiation Source Pulse Width Pulse Energy (variable) Thermal Diffusivity Range Thermal Conductivity Range Repeatability Thermal Diffusivity Heat Capacity Thermal Conductivity Accuracy Thermal Diffusivity Heat Capacity Thermal Conductivity Sample Environment Temperature Range Atmosphere RT to 1200˚C Air, inert, vacuum (10-3 torr) Maximum Samples Sample Dimension Repeatability and accuracy values reflect the results of systematic testing on standard reference materials.

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discovery xenon flash DXF The Discovery Xenon Flash (DXF) platform employs a High Speed Xenon-pulse Delivery source (HSXD) which has considerably lower cost and less maintenance than a laser and generates equivalent results. A reflective optics system harnesses the power of a Xenon flash tube and delivers it to the specimen. These proprietary optics feature an anamorphic multi-faceted light pipe that produces a flash of uniform intensity across the sample and efficiently collects the Xenon lamp radiation for the maximum possible The DXF-200 is a sub-ambient test system. Using an efficient liquid...

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Radiation Source High Speed Xenon-pulse High Speed Xenon-pulse High Speed Xenon-pulse Delivery Source Delivery Source Delivery Source Pulse Width Pulse Energy (variable) Heat Capacity Thermal Conductivity Thermal Diffusivity Range Thermal Conductivity Range Repeatability Thermal Diffusivity Heat Capacity Thermal Conductivity Accuracy Thermal Diffusivity Sample Environment Temperature Range Atmosphere Maximum Samples Sample Dimension Repeatability and accuracy values reflect the results of systematic testing on standard reference

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technology flash method Precision Detector Optics The Discovery Flash instruments feature advanced detector optics that provide uniform, accurate measurement of the sample thermogram. With an IR detection area that covers more than 90% of the sample surface, representative data is collected that is not subject to sample inhomogeneity. The detector optics are designed to measure this large sample area exclusively. Isolation guards prevent contributions from extraneous radiation including edge effects such as flash-through that can arise from imperfect sample preparation. IR intensity is tuned to...

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Simple Sample Containment All Discovery Flash systems utilize an elegant sample containment system that makes sample preparation and loading fast and easy while providing Standard Available Sizes Square (L) optimal flash data. Sample holders of defined dimensions support the specimen around its perimeter. The system does not require any pressure or clamping, making it very well-suited for delicate specimens. Lava (alumina silicate) and Mullite are preferred for their ability to block off-sample flash energy. Alumina sample holders are also available. The flash method is widely accepted and is...

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automation productivity and accuracy All Discovery Flash Diffusivity instruments include automated sampling systems. These systems allow for the measurement of two or four samples in a single experiment. While the length of an individual flash diffusivity measurement is very short, the total experiment time can be considerable when allowances are made for establishing a vacuum and inert purge, and stabilization of high operating temperatures. In addition to time savings associated with sample throughput, automated sampling systems provide valuable improvements in measurement accuracy. Specific...

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thermal conductivity Baseline introduction Heat transfer by conduction is governed by Fourier’s Law, which The TA Instruments DTC-25 and DTC-300 Thermal Conductivity defines the thermal conductivity, λ: Meters measure thermal conductivity according to the ASTM E1530 guarded heat flow meter method. In this technique, a sample of the material to be tested is held under a compressive load between two surfaces, each controlled at a different temperature. The lower surface is part of a calibrated heat flux transducer. As heat is transferred from the upper surface through the sample to the lower surface,...

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