The best equipment for measurement of all these three properties is hot disk thermal constant analyser (AB sweden). You can measure all these with one test. Thermal properties of liquids, bulk solids and thin films can be easily measured

Hi there,

For steady state thermal conductivity you may use:

Bulk materials: absolute technique, comparative technique, radial heat flow method, parallel conductance method

Thin films: steady-state electrical methods

The rest of the properties can be measured with DSC.

Good luck,

Regards,

Eva

Thermal conductivity can be measured by thermal conductivity meter, and heat capacity can be obtained from DSC analysis. Having these two in hand, density of the sample is needed for thermal diffuisivity!

Hi, the Laser Flash Method claimes to allow measurment of these properties. For instance see: https://www.netzsch-thermal-analysis.com/us/products-solutions/thermal-diffusivity-conductivity/lfa-467-hyperflash/

However, the specific heat is presumably measured more precisely with step scanning in a DSC.

Best Regards,

Benjamin

The best equipment for measurement of all these three properties is hot disk thermal constant analyser (AB sweden). You can measure all these with one test. Thermal properties of liquids, bulk solids and thin films can be easily measured

C-Therm in Canada offers the TCi unit, which allow you to perform those measurements simultaneously and using a very small sample:

http://ctherm.com/products/tci_thermal_conductivity/

Hello,

I want to contradict the last two answers. Without knowing what substance, how accurate, which temperature range, ... you want to measure - nobody can say what instrument is the best for measuring thermal conductivity. Hot Disk and TCi units (and Laser Flash too) may be good to measure normal substances like pure! liquids and homogenous solids around room temperature. They mostly fail if the substance become more complex, like foams, nanofluids, gases, inhomogenous mixtures... . The same is true for hot wire, steady state methods and other because if the applicant doesn't know how the method works in detail, many easy errors can be done which results in very bad results. For more information about such errors you can read literature about enhancements of thermal conductivity of nanofluids, by Wakeham, Nieto de Castro, Assael, Buschmann, Fedele, Feja...

Please give a hint what do you want to measure and the answer will be more usefull for you.

Best Regards

Steffen.

If you are working with solid samples (for example crystals) the is one very suitable techniqe. That is a Photopyroelectric calorimetry. This method allows to measure thermal diffusivity and thermal effusivity simultaneously. The importance here is next. By combination of these two parameters you can easily calculate thermal conductivity and also specific heat.

Here you have some links with papers where you will findinformation what I am writing about.

Article Improved thermal effusivity measurements of solids using the...

http://www.sciencedirect.com/science/article/pii/S0022369717311381

Steffen Feja is partially right about the difficulties at the measurements. However, the problem is already connected with a chamber for the measurement and specimen geometry. We are using several chambers for different temparature ranges from -40°C up to 1400°C. All chambers were build for transient techniques, but in some of them the stationsary technique is available. This allow the use any transient technique for any kind of solid material and with a special container also the liquid and gass. The list of some transient techniques used in our laboratory withthe chamber for the measurement from -40 up to 250°C is available at the page http://www.fu.sav.sk/index.php?id=167&L=2 and on the page http://thermophys.savba.sk/Methods.htm. The methods are based on the models, so no calibration is necessary. Transient methods are based on the models with combination of usually two thermophysical parameters included. The third one is calulated form the formula ThermlaConductivity=TheramDiffusivity*Density*SpecificHeat . Otherwise you have to use three diffrent apparatusses like it is described in a acontributions above.

Dear Khurshid,

an answer depends on goals of your investigation and is determined by several factors including:

1) the material which thermal properties you want to measure (liquids, solids, porous materials, rocks…);

2) the size/volume of specimen;

3) the conditions of experiment (atmospheric conditions, increased pressure / temperature);

4) requirements for quality/accuracy.

If you mean rocks at atmospheric pressure and temperature, the detailed answer on your question can be found in Popov et al. 2016. ISRM Suggested Methods for Determining Thermal Properties of Rocks from Laboratory Tests at Atmospheric Pressure. DOI 10.1007/s00603-016-1070-5

Regards,

Evgeny

Please read the introduction of my article:Article A new numerical method and modified apparatus for the simult...

At the end of the introduction there is a table summarizing all available techniques for the measurement of thermal conductivity, specific heat, thermal diffsivity and others (with each techniques indicative application limits).

I hope that helps :)

Thanks ! all of you, for valuable comments.

TCI THERMAL CONDUCTIVITY ANALYZER is the best choice! go to the link for further details as provided by Dr. José M.S. Fonseca

http://ctherm.com/products/tci_thermal_conductivity/specifications/

@Kashif Mairaj Deen: Did you read the whole conversation? Please read first and then write. What you did is obviously advertising and imho forbidden in this scientific portal!

Dear Dr. Steffen,

With due respect, First, I am thankful to you to let me know the right thing, I know you are expert in this area. I have few more suggestions for you and request you to please follow the professional attitude. You should first learn about the ethics of conversation then you can point out directly with name. If you contradict with my answer or have any personal concern with TCi company, or with Dr. Jose opinion, this is your issue not mine. I am neither advertising anything nor representing anyone. It is just my opinion and i have right to express. I hope you will get my answer with positive attitude.

According to me, your equipments will enable you to measure only the specific heat.You need at least another one to characterize the thermal properties of your materials. The choice depends on the factors pointed out by E. Chekhonin, but be aware that there is no universal method enabling the characterization of materials for all the range of possible thermal properties, contrary to what can write certain people. So, we need to know your materials to be able to give you advice.

Our book "Thermal properties measurement of materials" may give you useful informations.

The best instrument for measurement of specific heat capacity for most routine applications is a differential scanning calorimeter. Specific heat capacity is the first derivative of the heat flow curve into the sample as a function of temperature - given that DSC is the only method capable of directly measuring this heat flow while simultaneously controlling for the effect of environment, it is the most robust means of doing so. In some cases, more specialized apparatus (e.g. drop calorimetry) may be more appropriate (for example, if the goal is to develop primary reference standards).

For thermal conductivity and thermal diffusivity, the method I'd recommend would depend on the sample. Contrary to what some would claim, there is not a single "magic bullet" for determination of these properties. In my lab, we use MTPS for many types of polymers, ceramics, and liquids, as well as bulk metals. We use TPS for thin samples (the "slab" algorithm as defined in ISO 22007-2) and for certain filled or orthotropic samples. We use laser flash for small samples or for testing solids at elevated temperatures where radiation may otherwise be an issue, and we use needle probe (transient line source) for polymer melts, unconsolidated solids, and other physically challenging materials.