AIST>Network Database System for Thermophysical Property Data

Network Database System for Thermophysical Property Data is developed and run by AIST, and is available for free. Thermophysical properties data (ex. Thermal conductivity, thermal diffusivity, heat capacity, density, surface tension and vapor pressure) for liquid, solid and melts are stored in this database.

Browsing DB by Web browser: TPDS-web

- About -

About Network Database System for Thermophysical Property Data

So far, a plenty of material / matter databases have been developed, but those databases are so called databases. In those databases, it was general that only one organization that played a roll as a data center collects, deals with all transaction to register, to administrate, to supply data.

The other hand, NMIJ (National Metrology Institute of Japan) suggests a concept of "Network Database System for Thermophysical Property Data", in which each institute that supplies data is responsible for its own thermophysical property database continuously and user can access to each database by one client interface "InetDBGV" through internet. And NMIJ has been developing the database that unifies each database and holds thermophysical properties like thermal conductivity, thermal diffusivity, specific heat, emissivity and so on.

This is based on the research achievements of "Research on Prototype Thermophysical Property Database System", one of the task of "Research on Measurement Technology and Reference Materials for Thermophysical Properties of Solids" which was supported by the Special Coordination Funds from Science and Technology Agency (Special Coordination Funds for Promoting Science and Technology) during 5 years from 1997 to 2001.


Hierarchical classification of materials

Materials are displayed in a tree structure and we have been hierarchically classified and recorded under our rules. If you have an understanding of the characteristic of materials, you can access the material you want to see through the tree structure.

Access control by user and project

Data recording in collaboration with our institute is our basic principle. Collaborative researchers and registranted users are assigned a individual user account. We control access to our property data by individual user accounts and data projects to ensure data security.

Property data

The information of table data, equation data, reference, measurement instrument or technique and uncertainty can be recorded for each property data. Some data sources may not be fully recorded these information. Property data with variable can be displayed a graph to visually grasp.


We standardize the units in SI units as far as possible. Such as spectrum data, only when its characteristic is easier to understand if we make exception, we use the units other than SI units.

Search functions

It is possible to search data by material names, chemical formula, specifying the range of property and their logical operations.

Browsing systems

There are two ways to browse our database. One is by using web browser, and the other is by using the exclusive software InetDBGV. Browsing system using web browser provides the functions described above and can be used without user registration. Exclusive software InetDBGV requires user registration, and its functions are more enhanced than the system using web browser such as plotting multiple data sets on one graph and search by property range.

Network of our database

The organizations that are involved in the thermophysical property database own the data that each organization is charged in, they are responsible for registration, update of thermophysical property data.

    Figure of TPDB concept

Collaboration with research institutes

Development of thermophysical property data of high temperature melts (Dr.Ishikawa, JAXA)
Development of thermophysical property data of melts (Dr.Fukuyama, etc., Tohoku Univ.)
Development of thermophysical property data of thin films (Shigesato Lab., Aoyama Univ.)
Thermophysical property data release service (Japanese Society of Thermophysical Properties)

Recored properties

Amount-of-substance fraction of substance /
Boundary thermal conductance /
Boundary thermal resistance / Bubble pressure /
Density / Electrical resistivity / Enthalpy / Entropy /
Electrical conductivity / Extinction coefficient /
Heat of fusion /
Heat of vaporization / Hemispherical total emissivity /
Linear thermal expansion / Lorentz number /
Mass diffusion coefficient / Poisson ratio / PVT /
Refractive index / Saturated liquid density /
Saturated pressure / Second order nonlinear constant /
Seebeck coefficient / Soret coefficient /
Sound velocity / Specific heat capacity / Specific volume /
Spectral emissivity / Surface tension /
Thermal conductivity / Thermal diffusivity /
Thermal effusivity / Thermal expansion coefficient /
Thermoelectric figure of merit /
Third order nonlinear constant /
Vapor pressure/ Viscosity /
Volumetric thermal expansion /
Volumetric thermal expansion coefficient /
Yield stress / Young's modulus

Sponsorship / Found / Projects

2002 - 2012
RIO-DB research project (intramural public offering)
"Development of Network Database System for Thermophysical Property Data"

2006 - 2007
NEDO (The New Energy and Industrial Technology Development Organization)
Research and Development to Promote the Creation and Utilization of an Intellectual Infrastructure
"Research on Building of Cooperative Platform for Material Database"

1999 - 2001
NEDO (The New Energy and Industrial Technology Development Organization)
Research and Development to Promote the Creation and Utilization of an Intellectual Infrastructure
"Research on Standard Reference Data of Thermophysical Property for Solid and High Temperature Melt and Measurment Technique"

NEDO (The New Energy and Industrial Technology Development Organization)
Intellectual Infrastructure Project Utilizing Function of Private Sector (Research and Development Project of Fast Acting Intellectual Infrastructure Construction)
"Development of Thermophysical Property Data Infrastructure for Creation of New Industries"

1997 - 2001
Intellectual Infrastructure Development Project on the Science and Technology Promotion Adjustment Expenses
"Research on Measurment Technique for Thermophysical Property of Functional Materials and Standard Materials"
Subtopic: "Research on Prototype Thermophysical Property Database"

Browsing system by web browser


It is possible to use simple search or data comparison of the browse system without depending on a certain OS or browser.

Data Update Info.