Thiết Bị Đo Hệ Số Dẫn Nhiệt

Khả năng khuếch tán và độ dẫn nhiệt là các thông số nhiệt lý quan trọng nhất của vật liệu để mô tả những đặc tính truyền nhiệt của một vật liệu hoặc thành phần. Để đo chính xác các đặc tính lý nhiệt như độ khuếch tán nhiệt, công nghệ Laser Flash (LFA) đã tự nó chứng minh là một phương pháp tuyệt đối nhanh, linh hoạt và chính xác. NETZSCH cung cấp 04 dòng LFA, bao gồm toàn bộ mật độ phổ nhiệt độ và vật liệu.


Dựa trên phương pháp đo tuyệt đối, GHP 456 Titan là thiết bị lý tưởng để xác định độ dẫn nhiệt của sự cách điện.

 

Độ dẫn nhiệt là một đặc tính lý nhiệt quan trọng khác được xác định bằng máy đo lưu lượng nhiệt (HFM) với phương pháp đĩa của các chất cách điện.

Thiết Bị Đo Hệ Số Dẫn Nhiệt




HFM 446 Lambda

HFM 446 Lambda

HFM 446 Lambda Series Heat Flow Meter

Never before has the topic of the saving and efficient use of energy attracted as much attention in economics and politics around the globe as it does today. Research and development efforts in industry and academia worldwide are addressing topics that contribute to saving energy or generating energy from alternative resources.

There is enormous potential, especially in the areas of insulation materials and the efficient thermal insulation of residential and commercial buildings. It is thus all the more important for insulating materials to be able to be manufactured with a high and steady level of quality and brought onto the market under strict control of their performance characteristics.

There are numerous standards and guidelines to which these products are subject in order to really guarantee these properties for the huge amounts of insulating materials being produced worldwide.

GHP 456 Titan®

GHP 456 Titan®

GHP 456 Titan®

Innovative Guarded Hot Plate System GHP 456 Titan® for Determination of Thermal Conductivity of Insulations

The GHP 456 Titan® is the ideal tool for researchers and scientists in the field of insulation testing. Based on the well-known, standardized guarded hot plate technique (e.g. ISO 8302, ASTM C177, DIN EN 12939 or DIN EN 12667), the system features unrivalled performance over an unmatched temperature range.

Combining state-of-the-art technology with the highest quality standards, NETZSCH has designed a robust and easy-to-operate instrument, featuring unparalleled reliability and optimum accuracy over a broad temperature range.

The NETZSCH GHP 456 Titan® is the new benchmark in Guarded Hot Plate measurements.

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LFA 427 Laser Flash

LFA 427 Laser Flash

LFA 427 Laser Flash Apparatus / Pyrometer version for up to 2800°C

Laser Flash technique over the broadest temperature range

Thermal conductivity and thermal diffusivity are the most important thermophysical material parameters for characterizing the thermal transport properties of a material or component. The Laser Flash technique is currently the most widely accepted method for precise measurement of the thermal diffusivity and the LFA 427 is the number one instrument on the world market.

High precision and reproducibility, short measurement times, variable sample holders and defined atmospheres are outstanding features of LFA measurements over the entire application range from -120°C to 2800°C.

A special version with a pyrometer allows measurements from room temperature to 2800°C.

The thermal conductivity of disk-shaped samples of ceramic, glass, metals, melts and liquids, powders, fibers and multi-layer materials ranging from vacuum insulation panels to diamonds is measured with equal speed and accuracy. The temperature-dependent measured thermal diffusivity value along with the corresponding specific heat (DSC 404 F1 Pegasus®) and density (DIL 402 C) data are used to calculate the thermal conductivity.

The laser power, pulse width, gas and vacuum are variable over a wide range, making it possible to set the optimum measurement conditions for the very different sample properties.

 

The LFA 427 is the most powerful and versatile LFA system for research and development as well as all applications involving characterization of standard and high-performance materials in automobile manufacturing, aeronautics, astronautics and energy technology.

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LFA 467 HyperFlash®

LFA 467 HyperFlash®

LFA 467 HyperFlash® – Light Flash Apparatus

Broadest temperature range available, from -100°C to 500°C

With a single instrument setup – that is, without having to swap out either the detector or the furnace – the LFA 467 HyperFlash® can carry out measurements from -100°C to 500°C. Coupled with the broadest range of accessories available on the market, the instrument opens the door to completely new dimensions in the determination of thermophysical properties.

Sample throughput up to 4 times higher due to sample holder for 16 samples

One unique advantage of the LFA 467 HyperFlash® is its ability to simultaneously measure up to 16 samples over the entire temperature range. This allows for maximum sample throughput with a minimum input of operational time and effort.

Refill systems are available for automatic refilling of the Dewar on both the detector and the furnace, allowing uninterrupted operation of the LFA system around the clock.

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LFA 467 HT HyperFlash®

LFA 467 HT HyperFlash®

LFA 467 HT HyperFlash® – Light Flash Apparatus

Accurate thermal diffusivity and thermal conductivity measurements between RT and 1250°C with Xenon Flash

The LFA 467 HT HyperFlash® is based on the already-established LFA 467 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 until 1250°C without costly consumables.

ZoomOptics – For precise measurement results by an optimized field of view

The patented ZoomOptics system (patent no.: DE 10 2012 106 955 B4  2014.04.03) optimizes the field of view of the detector, thus eliminating any influences caused by aperture stops. The result is a significant increase in the precision of the measurement results.

Ultra-fast sampling rate (up to 2 MHz) and extremely short pulse widths (up to 20 µs) enabling measurement of thin and highly conducting materials

The data acquisition rate of the LFA 467 HyperFlash® series was increased to 2 MHz. This acquisition rate applies to both the IR detector and the pulse mapping channels. Thereby, highly conductive and/or thin materials requiring very short test times can be reliably tested.

When testing metal (0.3 mm) and polymer foils (30 μm), an optimum sampling rate and pulse width can be selected. The patented pulse mapping system accounts for the finite pulse width effect and heat losses (patent no.: US7038209 B2; US20040079886; DE1024241).

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