Dilatometry (DIL)

What is DIL?

Dilatometry (DIL) is a thermal analysis technique that measures dimensional changes in materials as a function of temperature or time. It tracks expansion, shrinkage, and phase transitions to test materials in R&D, production, and failure analysis.


Principle of work:

It provides critical data on:

  • Thermal Expansion – Quantifies linear or volumetric expansion coefficients (CTE), essential for understanding material behavior under temperature variations.
  •  Phase Transitions – Detects subtle changes in dimensions during processes like sintering, crystallization, or glass transitions (Tg), complementing DSC data.
  • Sintering & Densification – Monitors shrinkage rates during firing or heat treatment, crucial for ceramics, metals, and powder metallurgy.
  • Reaction Kinetics – Tracks dimensional changes during chemical reactions, curing, or decomposition to determine reaction progress and stability.
     

Application

  • Ceramics & Glass – Optimizing firing cycles by measuring sintering shrinkage and thermal expansion mismatch to prevent cracking.
  •  Metals & Alloys – Evaluating CTE for aerospace components and studying phase transformations in heat treatments.
  •  Polymers & Composites – Characterizing cure shrinkage in thermosets and expansion behavior in thermoplastic applications.
  •  Quality Control – Ensuring batch consistency by comparing expansion profiles and detecting anomalies in production materials.
  • By providing precise dimensional data under thermal stress, DIL helps engineers and researchers predict material performance, prevent failure, and optimize manufacturing processes.
     

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