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*CaTCalc software is updated to 2023 version. 2023/08/31

*RICT-Salt database is released. 

*RICT-Cerm, RICT-Sol, RICT-Ceram have been updated.

*Thermodynamic Database for Ceramics Materials: RICT-Ceram is newly released thermodynamic database for ceramics materials.

Computaional Thermodynamics

Computational thermodynamics is the quantitative numerical analysis of the chemical and physical properties of real, complex, multi-component, multi-phase material materials based on thermodynamics. It was developed as the CALPHAD method (Calculation of PHAse Diagrams: Computational State Diagrams), which is highly practical and is now an essential tool in materials development, especially for metallic materials.


CaTCalc is a thermodynamic software developed at the National Institute of Advanced Industrial Science and Technology (AIST). It is capable of performing a variety of calculations, including complex thermodynamic equilibrium calculations for multiphase and multicomponent systems, chemical reaction calculations, phase diagram calculations, and solidification simulations. In addition, robust and stable calculations are possible not only for metals, but also for ceramics, compounds, gases, and aqueous solution systems. Refer to the Software page for details.

In addition to the pure substance database, we are also developing databases for metallic and ceramic systems as dedicated databases. Refer to the Databases page for details.

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