LFA 1000 Laser Flash Apparatus (Thermal Conductivity / Diffusivity)
20Pages

LASER FLASH ANALYSIS

Since 1957 LINSEIS Corporation has been delivering outstanding service, know how and leading innovative products in the field of thermal analysis and thermo physical properties. Customer satisfaction, innovation, flexibility and high quality are what LINSEIS represents. Thanks to these fundamentals, our company enjoys an exceptional reputation among the leading scientific and industrial organizations. LINSEIS has been offering highly innovative benchmark products for many years. The LINSEIS business unit of thermal analysis is involved in the complete range of thermo analytical equipment...

German engineering The strive for the best due diligence and ac- We want to deliver the latest and best tech- countability is part of our DNA. Our history is af- nology for our customers. LINSEIS continues fected by German engineering and strict quality to innovate and enhance our existing thermal analyzers. Our goal is constantly develop new technologies to enable continued discovery in science.

THE TECHNIQUE Information about the thermophysical proper- others. Trouble-free sample preparation, small ties of materials and heat transfer optimization required sample dimensions, fast measurement of fi­ al products is becoming more and more vin times and high accuracy are only a few of the tal for industrial applications. Over the past few advantages of this non-contact and non-de- decades, the flash method has developed into structive measurement technique. a commonly used technique for the measurement of the thermal diffusivity and thermal con- LINSEIS offers a variety of instruments...

MEASUREMENT CONCEPT The sample is positioned on a sample robot, a very sensitive high speed IR detector. Both, which is surrounded by a furnace. For the thermal diffusiviy and specific heat can be de- measurement, the furnace is held at a predeter- termined from the temperature vs. time data. If mined temperature and a programmable en- the density (r) is identified, the thermal conduc- ergy pulse irrdiate the back side of the sample, resulting in a homogeneous temperature rise at the sample surface. The resulting temperature rise of the surface of the sample is measured by Pulse duration...

ABSOLUTE METHOD The method used is an absolute measurement Laser Flash operate in agreement with natio- technique (for thermal diffusivity), hence there nal and international standards, such as ASTM is no need to calibrate the system. The LFA 1000 SYSTEM DESIGN The vertical arrangement with sensor on top, 25 Joule/pulse. In addition the pulse duration sample in the middle and Laser Flash sour- can be adjusted. Due to this flexibility all kinds ce on the bottom ensure easy handling and of demanding samples (thin film or ultra-low best possible measurement results. The pulse thermal...

FUTURE UPGRADES LINSEIS is offering an unparalleled modular sys- start with a cost effective solution and upgrade tem design. It is possible to upgrade the tempe- the system whenever the budget allows or the rature range (exchangeable furnaces) and the measurement task requires it. detector (InSb/MCT). This enables the user to DETECTORS The system can be either equipped with an InSb An automatic LN2 refilling accessory with Dewar detector or with a MCT detector , covering the can be ordered for prolonged measurement cy- complete temperature range from sub-ambient up to 1600°C. Both are...

VISION CONTROL The vision control feature provides best signal gement overcomes positioning accuracy pro- quality for any sample dimension. The lens se- blems with existing zoom lens systems by ensu- lection tool ensures superior signal quality for ring best possible Specific Heat determination big and small samples. In addition the arran-

Motorized zoom lense Fixed position zoom lense sensor active area sample diameter Measurement principle Vision Control Zoom Lense In a Flash system the signal quality depends on LINSEIS „Vision Control“ fixed position zoom the amount of radiation of the sample which lens arrangement ensured a perfect detection hits the surface of the infrared detector. Normal- spot for different sample geometries. In additi- ly the active surface of the detector is limited on the fixed position lens arrangement, compa- (e.g. 2x2mm) compared to a sample diameter red to a motor driven „Zoom“ objective,...

UNMATCHED SAMPLE THROUGHPUT Highest throughput in the market. The combi- time. A typical measurement for up to 18 samp- nation of sample robot and i nfrared furnace les takes only a few hours. unbeaten measurement Sample carriers 18 round or square samples 3mm or 6 mm 6 saples round or square 3mm, 6mm, 10mm or 12.7mm 3 samples round 25.4mm or square 20mm Sample holder Sample holder square samples 3x3mm / 10x10mm / 20x20mm

Liquid Container Sample holder for lamellas in plane / Cross plane Sample holder round Sample holder for liquids and pastes Torque pressure container

• Fully compatible MS®Windows™ software • Data security in case of power failure • Safety Features (Thermocouple break protection, power failure, etc.) • Online and offline Evaluation of current measurement • Curve comparison • Storage and export of evaluations • Export and import of data in ASCII format • Data export to MS Excel • Multi - method analysis (DSC TG, TMA, DIL, etc.) • Programmable gas control Measurement Software • Easy and user-friendly data input for temperature segments, gases etc. • Controllable sample robot • Software automatically displays corrected measurements after...

Cp (Specific Heat) determination by comparative method To calculate the specific heat capacity, the ma- Since the energy is the same for sample and re- ximum of the temperature raise in the sample is ference, the Cp of the sample can be calculated compared to the maximum of the temperature according the following equation: cp Reference • ∆T Reference • m Reference cpSample = ∆T Sample • m Sample raise of a reference sample. Both, the unknown and the reference sample are measured under the same conditions in a single run, using the To achieve a good accuracy, the absorbability sample robot....