Dilatometer Applications

Ceramics industry / Powder metallurgy

Pincture 4: rate controlled sintering

In production processes of high-tech ceramics (AI₂O₃) a simulation of sinter process's is of special interest. When using the optional software package RCS (rate controlled sintering) it is possible to program controlled sintering in the dilatometer as per the PALMOUR III theory.

Picture 4 shows the sintering process of ZrO₂. Here the final density of 100 % is achieved. The initial heating rate decrease as the final density is reached.

Steel industry

Picture 5: dilatometer with quenching system

Picture 5 shows a run with a steel sample that was cooled quickly with a quenching system from 550°C to room temperature over 20 minutes. At about 220°C a subtle phase change can be seen. This kind of measurement is used to draw ZTU diagrams.

Porcelain and stoneware industry

Picture 6: Quartz Crystal Change on a stoneware sample

Picture 6 shows a measurement of a clay sample with a dilatometer. This sample shows a subtle change of expansion at 570°C which comes from a alpha/beta change of the quartz crystal structure. This type of dilatometer measurement is important for the quality control in the porcelain and stoneware industry. This method will quickly determine the quality of raw materials used for the production of whitewares.

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