SBA 458 Nemesis®

Simultaneous Determination of Seebeck Coefficient and Electrical Conductivity

A Measurement Setup for Varied Sample Geometries

The SBA 458 Nemesis® is heralded for its unique measurement setup, which accomodates more sample geometries than usually for this technique. Measurements can be carried out at temperatures up to 1100°C.

Quick Start to Measurements – Convenient Sample Change

Changing samples is accomplished quickly and easily by hand, without any tools. By using sheathed thermocouples sticking of the sample to the electrodes is avoided.

Integrated Quality Check – Outstanding Two-Heater System

The SBA 458 Nemesis® has two heavy systems that are employed in an alternating manner for each temperature step. Deviations from linearity and hysteresis due to inaccurate measurement can be immediately observed before and during the measurement.

Highly Reliable and Rugged Design – Avoiding Diffusion Problems

The thermocouples are firmly anchored and are immobilized during the measurements by a defined contact force resulting from the mass and the cold spring. Sheathing of the thermocouples prevents diffusion from cementing them to the sample.

No Distance Determination Required

Since the thermocouple positions are fixed, the cumbersome process of determining their distance before each measurement is eliminated. Eliminating this potential source of error in determining electrical conductivity increases the precision and reproducibility of the results.

Key Technical Data

(subject to change)

  • Design
    Two-heater system, integrated quality check, horizontal sample arrangement
  • Temperature range
    Room temperature to 800°C
    Room temperature to 1100°C
  • Temperature setting range
    Unlimited number of temperature steps
  • Thermocouples
    Inconel®-sheathed type K (NiCr/NiAl), Fixed position
  • Sample dimensions
    • Ø: 12.7 to 25.4 mm
    • Length x Width:
      12.7... 25.4 mm x 2.0... 25.4 mm
    • additionally:
      Length x Width: 10 mm x 10 mm
    • Thickness: 100 nm to 3 mm depending on the thermophysical properties
  • Accuracy
    • Seebeck coefficient ± 7%
    • Electrical conductivity ± 5%
  • Repeatability
    • Seebeck coefficient ± 3%
    • Electrical conductivity ± 3%
  • Atmosphere
    Reducing (max. 2% H2), inert, oxidizing
  • Vacuum-tightness
    10-2 mbar
  • Seebeck coefficient range
    10...2000 μV/K
  • Electrical conductivity
    0.05...150000 S/cm
  • Quality check for Seebeck measurement
    Yes (before and during the measurement)

Software

The software is based on Windows 7, 64 bit. It fully controls the measurements, which are performed at each specified temperature interval. The software allows for easy operation and control of the data.

The resistance (U-I plot) and quality check (Seebeck) functions are integrated. The measurement data can be easily exported.

Literature

Brochure

Brochure

Webcast

NETZSCH Webinar SBA