Hot wire method thermal conductivity tester High temperature thermal conductivity tester for refractory materials

1、 Overview

The DRX-3 thermal conductivity tester adopts the transient hot wire method, including the cross line method and the parallel line method. It mainly measures the thermal conductivity, thermal conductivity (thermal diffusion coefficient) and Specific heat capacity of solid and powder materials at different temperatures. It has the characteristics of high precision, high resolution, and high reproducibility. Automatic measurement is controlled by a computer. Widely applicable for measuring the thermal conductivity of materials in research institutions, quality inspection, factories and mines, and other departments.

This instrument has been redeveloped and designed based on our original DRX-2, improving measurement accuracy and reproducibility, making the structure more reasonable and convenient to use. Model classification: DRX-3A mainly uses the cross hot wire method (parallel line method can also be used to measure materials below 5w/mk); DRX-3B uses the parallel line method to measure materials below 25w/mk.

Instrument reference standard: GB/T 5990-2006 Test method for thermal conductivity of shaped insulating refractory products (hot wire method); GB/T 17106-1997 Test Method for Thermal Conductivity of Refractory Materials (Parallel Line Method); GB/T 11205-2009 Rubber - Determination of Thermal Conductivity (Transient Hot Filament Method); GB/T10297-2015 Determination of thermal conductivity of non-metallic solid materials (hot wire method), etc.

2、 Main technical specifications of Xiangtan Xiangke DRX-3 hot wire thermal conductivity tester and high-temperature thermal conductivity tester for refractory materials

1. Measurement range: DRX-3A (cross line method) 0.015-2.0 W/(m * K)

DRX-3A (parallel line method) 0.015-5.0 W/(m * K)

DRX-3B (parallel line method) 0.015-25.0 W/(m * K)

2. Temperature range: Conventional testing is at room temperature, and different constant temperature devices and testing hotlines can be selected according to user requirements for testing at different temperatures, with additional costs as follows:

-40-120 degrees Celsius (requires high and low temperature constant temperature box) with copper constantan hot wire

Room temperature -1000 degrees (requires distribution of resistance wire furnace) with nickel chromium nickel silicon or platinum platinum rhodium hot wire

Room temperature -1300 degrees (requires silicon carbide rod resistance furnace) with platinum platinum rhodium hot wire

Room temperature -1600 degrees (requires silicon molybdenum rod resistance furnace) with platinum platinum rhodium hot wire

3. Measurement accuracy:<5.0 (five percent);

4. Sample size: two mutually symmetrical Rectangular cuboid of not less than 40 * 80 * 114mm or two half cylinders of not less than 80mm in cross section diameter and not less than 114mm in length; (or customized according to user requirements),

5. Temperature resolution: 0.001 degrees

6. Hotline power supply: DRX-3A current resolution 0.01mA, voltage resolution 0.1mV

DRX-3B current resolution 0.1mA, voltage resolution 0.1mV

7. Equipment power supply: voltage 220V; Frequency 50Hz; Power 500W (refer to the instruction manual of the electric furnace temperature controller for the requirements of using the electric furnace temperature controller power supply)

Standard configuration: includes one DRX-3 testing host, one software, one communication interface and data cable, one desktop computer, and one room temperature testing hotline. Additionally, a constant temperature device and high-temperature line heating are optional options, configured according to the contract.