TCT 426 - Thermal Conductivity Tester: furnace/hot-wire method

Absolute determination of the thermal conductivity of ceramic materials in accordance with ISO 8894-1 and ISO 8894-2

TCT 426 - Thermal Conductivity Tester: furnace/hot-wire method
The TCT 426 works according to the hot wire method and is especially designed for the investigation of refractory rock. The measuring cross, parallel wire, and T(R) methods can be used in the instrument. The TCT 426 is indispensable for the efficient use of energy in industrial kiln engineering with refractories.
NETZSCH_TCT-426_Thermal-Conductivity-Tester-furnace-hot-wire-method.jpg
  • Product CategoryRefractory TestingRefractory Testing
  • Messmethode TCT TCT
  • Messparameter Thermal conductivity Thermal conductivity Thermal Expansion Thermal Expansion Creep behavior Creep behavior bulk density bulk density Specific heat Specific heat Thermal diffusivity Thermal diffusivity
  • Norm ASTM C177 ASTM C177 ASTM C335 - 05Ae1 ASTM C335 - 05Ae1 ASTM C1363 - 05 ASTM C1363 - 05 ASTM D5470 - 06 ASTM D5470 - 06 ASTM E1530 - 06 ASTM E1530 - 06 ASTM F433 - 02 (2009) ASTM F433 - 02 (2009) DIN EN 12667/12939 DIN EN 12667/12939 DIN EN 13163 DIN EN 13163 ISO 8301 ISO 8301 ISO 8302 ISO 8302 ISO 8894-1 (EN 993-14) ISO 8894-1 (EN 993-14) ISO 8894-2 (EN 993-15) ISO 8894-2 (EN 993-15) JIS A 1412 JIS A 1412
  • Temperature Accuracy
  • Purpose General General
TCT 426
TCT 426

Thermal conductivity and thermal diffusivity are the most important thermophysical parameters for characterization of the thermal transport properties of a material or component.
The hot-wire method is an absolute method for direct determination of the thermal conductivity, based on the measurement of the temperature increase of a linear heat source/hot wire (cross-wire technique, according to ISO 8894-1) or at a specific distance from a linear heat source (parallel-wire technique, according to ISO 8894-2).

The hot wire and thermocouple are embedded between two test pieces, which make up the actual test assembly. The time-dependent temperature increase after the heating current is switched on is a measure of the thermal conductivity of the material being tested.

Another variation, the so-called "Platinum Resistance Thermometer Technique" or "T(R) Technique", is described in ASTM-C 1113. Here an integral temperature measurement is carried out over the entire length of the hot wire; i.e. the hot wire is both heat source and temperature sensor at the same time.

The TCT 426 thermal conductivity tester enables the use of all three of the methods described in easily interchangeable, pre-wired measuring frames.

related links:

Definition of Thermal Conductivity        Definition of Thermal Diffusivity