Fast thermal conductivity tester

I. Definition

Transient planar heat source technique (TPS) is a new method for measuring thermal conductivity, developed by Professor Silas Gustafsson at Chalmer University of Technology in Sweden on the basis of the hot wire method. The principle of measuring the thermal properties of materials is based on the transient temperature response generated by a step heated disc-shaped heat source in an infinite medium. A flat probe made of a thermally resistant material acts as both a heat source and a temperature sensor. The thermal resistance coefficient of the alloy - the relationship between temperature and resistance is linear, that is, the heat loss can be known by understanding the change in resistance, which reflects the thermal conductivity of the sample. The probe of this method is a continuous double helix structure sheet formed by etching of conductive alloy, and the outer layer is a double layer of insulation protection, the thickness is very thin, which makes the probe have a certain mechanical strength and maintain the electrical insulation between the sample. During the test, the probe is placed in the middle of the sample for testing. When the current passes through the probe, a certain temperature rise is generated, and the generated heat is diffused to the sample on both sides of the probe, and the speed of thermal diffusion depends on the heat conduction characteristics of the material. By recording the temperature and the response time of the probe, the thermal conductivity can be obtained directly from the mathematical model.

 

Product features:

1. Wide test range, stable test performance;

2, direct measurement, test time about 5-160s can be set, can quickly and accurately measure the thermal conductivity, saving a lot of time;

3, will not be affected by the same contact thermal resistance as the static method;

4, no special sample preparation, there is no special requirement for the shape of the sample, the bulk solid only needs to be relatively smooth sample surface and meet the length and width
At least twice the diameter of the probe;

5, non-destructive testing of the sample, meaning that the sample can be reused;

6, the probe adopts the structure of double helix to design, combined with the exclusive mathematical model, the core algorithm is used to analyze the data collected on the probe

7, the structure of the sample table is clever, easy to operate, suitable for placing samples of different thickness, and simple and beautiful;

8, the probe data acquisition using imported data acquisition chip, the chip's high resolution, can make the test results more accurate and reliable;

9, the control system of the host uses ARM microprocessor, the computing speed is faster than the traditional microprocessor, improve the analysis and processing ability of the system, the calculation results are more accurate;

10, the instrument can be used for the determination of bulk solid, paste solid, granular solid, colloidal, liquid, powder, coating, film, insulation material and other thermal physical parameters;

11, intelligent human-machine interface, color LCD display, touch screen control, easy and simple operation;

 

Test range	0.005 ~ 300 w/(m * K)
Measuring temperature range	Room temperature ~130℃
Probe diameter	No. 1 probe 7.5mm; Second probe 15mm
Precision	≤2%
Repeatability error	≤3%
Measuring time	5~160s
Sample temperature rise	＜15℃
Power source	220V
Overall power	＜500W
Sample size	Single sample measured by probe 1 (15*15*3.75)mm The second probe measured a single sample (30*30*7.5)mm

 

Part of the use of thermal conductivity customer SCI papers

 

1、Hydrogel beads derived from chrome leather scraps for the preparation of lightweight gypsum

 

2、Size-controlled graphite nanoplatelets_ thermal conductivity enhancers for epoxy resin

 

3、Thermal, morphological, and mechanical characteristics of sustainable tannin bio-based foams reinforced with wood cellulosic fibers

 

4、Improved thermal conductivity of epoxy resin by graphene–nickel three-dimensional filler

 

5、A synergistic strategy for fabricating an ultralight and thermal insulating aramid nanofiber/polyimide aerogel

 

6、Fabrication of Graphene/TiO 2 /Paraffin Composite Phase Change Materials for Enhancement of Solar Energy Efficiency in Photocatalysis and Latent Heat Storage

 

7、Improved thermal conductivity of styrene acrylic resin with carbon nanotubes, graphene and boron nitride hybrid fillers

 

8、Preparation and characterization of paraffin/expanded graphite composite phase change materials with high thermal conductivity

 

9、Tailoring of bifunctional microencapsulated phase change materials with CdS/SiO2 double-layered shell for solar photocatalysis and solar thermal energy storage

 

10、Functional aerogels with sound absorption and thermal insulation derived from semi-liquefied waste bamboo and gelatin

 

11、Lamellar-structured phase change composites based on biomass-derived carbonaceous

 

sheets and sodium acetate trihydrate for high-efficient solar photothermal energy harvest

 

12、Construction of double cross-linking PEG/h-BN@GO polymeric energy-storage composites with high structural stability and excellent thermal performances

 

13、Gelatin as green adhesive for the preparation of a multifunctional biobased cryogel derived from bamboo industrial waste

 

14、A novel self-thermoregulatory electrode material based on phosphorene-decorated phase-change microcapsules for supercapacitors

 

15、Development of poly(ethylene glycol)/silica phase-change microcapsules with well-defined core-shell structure for reliable and durable heat energy storage

 

16、Experimental and numerical study on heat emission characteristics of ventilated air annular in tunneling roadway

 

17、Construction of polyaniline/carbon nanotubes-functionalized phase-change microcapsules for thermal management application of supercapacitors

 

18、Mechanical, thermal and acoustical characteristics of composite board kneaded by leather fiber and semi-liquefied bamboo

 

19、Tuning the oxidation degree of graphite toward highly thermally conductive graphite/epoxy composites

 

20、Thermal self-regulatory smart biosensor based on horseradish peroxidase-immobilized phase-change microcapsules for enhancing detection of hazardous substances

 

21、Morphology-controlled synthesis of microencapsulated phase change materials with TiO2 shell for thermal energy harvesting and temperature regulation

 

22、Size-tunable CaCO3@n-eicosane phase-change microcapsules for thermal energy storage

 

23、High-Efficiency Preparation of Reduced Graphene Oxide by a Two-Step Reduction Method and Its Synergistic Enhancement of Thermally Conductive and Anticorrosive Performance for Epoxy Coatings

 

24、Temperature and pH dual-stimuli-responsive phase-change microcapsules for multipurpose applications in smart drug delivery

 

25、Development of Renewable Biomass-Derived Carbonaceous Aerogel/Mannitol Phase-Change Composites for High Thermal-Energy-Release Efficiency and Shape Stabilization

 

26、Immobilization of laccase on phase-change microcapsules as self-thermoregulatory enzyme carrier for biocatalytic enhancement

 

27、Microencapsulating n-docosane phase change material into CaCO3/Fe3O4 composites for high-efficient utilization of solar photothermal energy

 

28、Integration of Magnetic Phase-Change Microcapsules with Black Phosphorus Nanosheets for Efficient Harvest of Solar Photothermal Energy

 

29、Surface construction of Ni(OH)2 nanoflowers on phase-change microcapsules for enhancement of heat transfer and thermal response

 

30、Design and fabrication of bifunctional microcapsules for solar thermal energy storage and solar photocatalysis by encapsulating paraffin phase change material into cuprous oxide

 

31、Design and construction of mesoporous silica/n-eicosane phase-change nanocomposites for supercooling depression and heat transfer enhancement

 

32、Development of reversible and durable thermochromic phase-change microcapsules for real-time indication of thermal energy storage and management

 

33、Nanoflaky nickel-hydroxide-decorated phase-change microcapsules as smart electrode materials with thermal self-regulation function for supercapacitor application

 

34、Biodegradable wood plastic composites with phase change microcapsules of honeycomb-BN-layer for photothermal energy conversion and storage

 

35、Hierarchical microencapsulation of phase change material with carbon-nanotubes/polydopamine/silica shell for synergistic enhancement of solar photothermal conversion and storage

 

36、Molecularly Imprinted Phase-Change Microcapsule System for Bifunctional Applications in Waste Heat Recovery and Targeted Pollutant Removal

 

37、Pomegranate-like phase-change microcapsules based on multichambered TiO2 shell engulfing multiple n-docosane cores for enhancing heat transfer and leakage prevention

 

38、Innovative Integration of Phase-Change Microcapsules with Metal–Organic Frameworks into an Intelligent Biosensing System for Enhancing Dopamine Detection

 

39、Morphology-controlled fabrication of magnetic phase-change microcapsules for synchronous efficient recovery of wastewater and waste heat

 

40、Polyimide/phosphorene hybrid aerogel-based composite phase change materials for high-efficient solar energy capture and photothermal conversion