NETZSCH Termica Neo Reveals Dense Ceramic Sintering

What happens inside a ceramic during sintering?

Temperature gradients, density variations, and heat-flow changes all shape the final microstructure.
Until now, these dynamics were hidden — estimated only from shrinkage curves or density measurements.

NETZSCH Termica Neo changes that. It transforms sintering kinetics into 3D maps of temperature, densification rate, and heat transfer, showing you how your material consolidates layer by layer.

3D simulation of temperature and sintering degree in silicon nitride (Si₃N₄) visualizing heat and densification fields during ceramic sintering. — Figure: 3D simulation image showing the temperature and degree of sintering fields in Si₃N₄.

The Challenge of Sintering Simulation

Sintering is more than just heating up. It couples diffusion, porosity, and thermal conductivity, each changing with temperature and density.
A uniform furnace temperature doesn’t mean uniform densification. The core can lag or overheat depending on geometry and heat transfer.

The NETZSCH software Termica Neo dynamically links these phenomena:

Imports Kinetics Neo models for sintering rate vs. temperature.
Accounts for density-dependent thermal conductivity.
Simulates temperature, sintering rate, and degree of sintering (α) in 2D or 3D space.

Case Study: Silicon Nitride (Si₃N₄)

Termica Neo simulations show a dramatic increase in thermal conductivity — around 25 times higher from green to fully sintered material. This shift changes the internal heat flow and accelerates densification at the surface. The model predicts:

~17% length shrinkage,
40% density gain,
temperature and densification fronts moving inward.

The insight: control heating rates and holds to achieve homogeneity without microcracks, not just total densification.

Case Study: Zirconia Optimization

Termica Neo tested multiple heating profiles for zirconia. An optimized 72-minute sintering program produced uniform temperature and densification fields with minimal stress.
Uneven profiles revealed cooler cores and delayed sintering fronts. These are key indicators for adjusting the process.

Zirconia sintering simulation with 2D heat maps of temperature, sintering rate, and degree of densification using NETZSCH Termica Neo. — Figure: Zirconia case with 2D maps of temperature, sintering rate, and degree of sintering.

See all case studies in detail in our new brochure:

Download brochure

Why It Matters

Sintering defines the final performance. Termica Neo helps you:

Visualize temperature and densification gradients in real time.
Optimize heating rates, holds, and cooling for uniform density.
Predict shrinkage behavior and thermal stress zones.
Shorten development loops and reduce costly trial batches.

It’s the clearest view ever into what really happens inside your ceramic part.

Benefits of Termica Neo

Direct kinetic import from Kinetics Neo Software
2D/3D visualization of temperature, densification, and sintering rate
Density-dependent thermal conductivity modeling
Realistic optimization of heat-treatment cycles
Fewer furnace trials | Higher yield | Predictable performance

About This Blog Series

This post concludes the NETZSCH blog series “The New Dimension of Thermal Analysis with Termica Neo.” See here the full series at a glance:

From Kinetic Model to Real-World Application — turning 1-D data into 3-D insight.
Scale-up & Safety — predicting runaways before they happen.
Polymer Curing — How Termica Neo Makes Curing Visible
Thermoplastic Crystallization– Understanding PA12 During Cooling
Ceramic Sintering – achieving uniform densification

--------------------------