Proven Excellence. Light Flash Apparatus LFA 717 HyperFlash® Series Analyzing & Testing Method, Technique, Applications of Thermal Diffusivity and Thermal Conductivity

Sample holder Furnace Light pulse Xenon light source Thermal Conductivity/Thermal Diffusivity How Fast Is Heat Being Transferred? Understanding thermal conductivity is essential to material selection in a variety of applications. Insulation materials require low thermal conductivity, while heat sinks require high thermal conductivity to efficiently dissipate heat. In industrial processes such as casting and welding, thermal conductivity influences the movement of heat, affecting process efficiency and quality. Thermal diffusivity is critical in situations where heat transfer changes with time,...

THE FLASH METHOD Light Flash An Efficient Method for Determination of Thermophysical Properties The Light Flash (LFA) technique is a fast, absolute, non-destructive, and non-contact method for determining thermal diffusivity. Using a reference specimen, the specific heat capacity of materials can also be characterized by LFA. The front surface of a plane-parallel sample is heated by a short energy light pulse. From the resulting temperature excursion of the rear face measured with an infrared (IR) detector, both thermal diffusivity and specific heat capacity can be determined. Combining these...

EXCELLENT EFFICIENCY -SIMULTANEOUS MEASUREMENT OF 16 SAMPLES The LFA 717 HyperFlash® features an automatic sample changer for up to 16 samples, accommodating round and square samples in four holders embedded in one furnace. ONE-INCH SAMPLE HOLDER FOR LARGE-DIAMETER SAMPLES Even larger samples can be measured using the 1-inch (0 25.4 mm) sample holder. Typical sample thickness range from 0.5 to 3 mm. FLEXIBILITY THROUGH COOLING Using liquid nitrogen as a coolant, samples can be measured at temperatures as low as -100°C. An optional compressed air unit is available for measurements between 0°C...

FOR HIGHLY ACCURATE AND RAPID THERMAL DIFFUSIVITY MEASUREMENTS RT to 1250°C UP TO 1250°C WITH XENON FLASH LAMP The LFA 717 HyperFlash® HT is based on the already-established LFA 717 HyperFlash® technology and requires no laser class due to the innovative light source system. The long lifetime of the xenon lamp provides cost-effective measurements up to 1250°C without costly consumables. WIDE TEMPERATURE RANGE WITH SMALL FOOTPRINT Measurements from either -100°C to 500°C or room temperature to 1250°C can be made with a single instrument setup. VACUUM-TIGHT FURNACE FOR DEFINED ATMOSPHERES TO PREVENT...

Accessories SAMPLE HOLDERS – CLEVERLY DESIGNED FOR SPECIAL APPLICATIONS Accessories Catalogue Full selection of LFA 717 HyperFlash® series accessories, containing sample holders, reference materials and tools Numerous sample holders for different sample geometries are available for measurements in the complete temperature range of both LFA instruments. These also include those that can be used for special applications. The design of the sample holder for liquids ensures continuous contact between the liquid and the crucible over the entire temperature range – even at freezing temperatures. The...

In addition to standard sample holders for solid samples of round and square geometries, we also offer sample holders designed for special applications on specific materials, including: Sample holders for liquids, pastes, polymer melts and resins are also available for the LFA 717 HyperFlash® HT. In addition, special sample holders also allow measurements on "liquid"* and powdery metallic samples. Molten polymers and low-viscosity liquids Resins during curing Pastes and powders Fibers Laminates Sample holder for foils (left), standard sample holder for up to 4 round samples (right) Special sample...

Cooling Accessories and Features that Focus on Efficiency and a More Sustainable Laboratory Handling Critical Materials Certain materials, such as toxic or oxygen/moisture-sensitive substances, require special handling to ensure operator safety. Exposure to the environment should also be prevented. Our LFA units can be designed in special glove box or hot cell versions that are engineered to meet these unique requirements, including the restricted handling of instruments. Internal and External Pump Systems An internal pump together with automatic evacuation control allow measurements in defined...

LESS ENERGY CONSUMPTION WITH THE LATEST CHILLER TECHNOLOGY The integration of a chiller in laser flash analysis plays a crucial role in ensuring stable initial temperatures and maintaining a controlled environment, both of which are essential for accurate measurements of thermal diffusivity and the subsequent determination of thermal conductivity. By minimizing temperature fluctuations, chillers enhance the reproducibility and reliability of measurements. However, chillers also consume energy and produce waste heat, which can contribute to operational inefficiencies. Therefore, the use of energy-efficient...

Proteus® Software Intelligent Operation – Just a Click Away The Proteus® 64-bit software is licensed with each instrument and can handle multiple instruments connected via USB in parallel or run on secondary installations on other computer systems. It is integrated in the NETZSCH Assistant as of version 9.5, which collectively links a wide variety of NETZSCH instruments as well as several third-party applications into one higher-level software management suite. NETZSCH Assistant to for managing all instruments and applications General Software Features Determination of the specific heat capacity...

A major LFA-specific upgrade was replacement of the previous database format with the new and faster SQL database format. This change in the underlying data structure leads to improved modeling times and yields results up to 2.5 times faster while using less memory space. The Latest Proteus® Software Version for Highest Stability and Most Reliable Results This means that users can now store an almost unlimited number of measurements per database. All common database management functions such as import/export and data merging are still available. Models and Corrections Classic and state-of-the-art...