Thiết bị đo độ khuếch tán nhiệt và độ dẫn nhiệt - LZT-Meter/LINSEIS

Model:
LZT Meter
Hãng sản xuất:
LINSEIS
Xuất xứ:
Germany

Combined LFA (Thermal Conductivity/Diffusivity) + LSR (Seebeck Effect and Electric Resistivity) for a complete ZT-Characterization

Danh mục:
Lượt xem:
1489

Giới thiệu
Thông số kỹ thuật
Ứng dụng và tiêu chuẩn
video
Tài liệu

The Linseis LZT Meter is the world’s first commercially available instrument that allows the determination of the thermoelectric Figure of Merrit ZT by means of a combined LaserFlash (LFA 1000) and LSR measurement in a single instrument.

Accordingly, an independent determination of the thermal conductivity by means of a flash method as well as a measurement of the electrical resistance and of the Seebeck-Coefficient (known from the LSR platform) can be carried out with this measuring device.

The advantage is obvious: The integrated design can save both, expensive laboratory space and unnecessary costs for double furnaces, measuring electronics and other equipment. Thus, the LZT-Meter is the ideal solution for research and development applications where the focus is not set on high sample throughput but on measurement quality and cost-efficiency. Because for the complete ZT-characterization of the sample, a single, disk-shaped geometry is completely sufficient.

Advantages of the combined measurement:

Measurement of a single sample
- No geometry error
- Same stoichiometry
- No problems with further sample preparation
Identical environmental conditions
- Temperature
- Humidity
- The atmosphere
Furthermore, all well known advantages of the LSR-Platform
- Resistivity measurements of high-resistance samples possible
- Optional Harman measurement
- Camera option

The unit is also available with three different furnaces:

An infrared furnace (for precise temperature control at very high and low heating rates)
A low-temperature furnace for measurements down to -100°C
A high-temperature furnace for measurements up to 1100°C

The supplied software package offers the possibility to evaluate all measurement data in a user-friendly way and to use the optionally integrated Harman ZT model.

Only one integrated device is necessary for a complete ZT characterization
Cost effective and space efficient
High-ohm option and variably positionable thermocouples allow reliably resistivity measurements, even for the most demanding samples
Interchangeable furnaces enable measurements in the temperature range from -100°C to 1100°C
Direct ZT measurement on legs (Harman method) and modules (impedance spectroscopy)
Thermal Conductivity Measurement by LaserFlash Method
High-speed infrared furnace available, for excellent temperature control during measurement as well as higher sample throughput
Wide range of thermocouples available (temperature range, shrouded, freestanding)
Camera option for high-precision resistivity measurements

MODEL	LSR-3 PART
Temperature range:	-100°C up to 500°C RT up to 1100°C
Measurement principle:	Seebeck-Coeffizient: Static-DC method / Slope-method Resistance measurement: Four-Terminal method
Atmospheres:	inert, red., oxid., vac.
Sample holder:	Vertical positioning between two electrodes Optional adapter for foils and thin films
Sample size (cylindrical oder rectangular):	2 to 5 mm rectangular and max. 23 mm long up to 6 mm in diameter and max. 23 mm long
Sample size round (disc shape):	10, 12.7, 25.4 mm
Probe distance:	4, 6, 8 mm
Water cooling:	required
Measurement range Seebeck-Coefficient:	1 up to 2500 µV/K Accuracy ±7% / Reproducibility ±3%
Measurement range Conductivity:	0,01 up to 210⁵ S/cm Accuracy ±5-8% / Reproducibility ±3%
Current source:	Low drift current source from 0 to 160 mA
Electrode material:	Nickel (-100 up to 500°C) / Platinum (-100 up to +1500°C)
Thermocouples:	Type K/S/C

Thermal Conductivity
Puls source:	Nd:YAG Laser (25 Joule)
Puls duration:	0,01 up to 5ms
Detektor:	InSb / MCT
Thermal Diffusivity
Measurement range:	0,01 up to 1000mm²/s
Addon	LSR-4 Upgrade
DC Harman-method:	Direct ZT-measurement on thermoelectric legs
AC Impedance-Spectroscopy:	Direct ZT-measurement on thermoelectric modules (TEG/Peltier-module)
Temperature range:	-100 up to +400°C RT bis +400°C
Sample holder:	Needle contacts for adiabatic measurement conditions
Sample size:	2 to 5 mm rectangular and max. 23 mm long up to 6 mm in diameter and max. 23 mm long Modules up to 50mm x 50mm