Apart from going to nano size range, is there any other way to increase sintering range of ceramic particles?
Do you mean lowering the sintering temperature? The transition to nanoparticles just lowers the sintering temperature in all cases. The larger the particle size, the higher the sintering temperature, and for millimeter-sized particles it becomes equal to the melting temperature.
If you mean lowering the sintering temperature, then this problem is solved with the help of various additives. Some ceramics, such as tin oxide, zirconia, tungsten carbide or quartz, do not sinter at all in their pure form.
Sintering additives are different and perform different functions. In most cases, sintering aids cause the formation of a liquid phase that promotes sintering.
Sintering with additives has been known since antiquity. The most striking example is Chinese porcelain.
Thankyou Sir, Yes, the meaning is to lower the sintering temperature. And besides size reduction, sintering additives also helps. but most of these additives also affects the melting point of the ceramics by reducing it...
By increase in sintering temperature range, I mean to say that is there any means which reduces the sintering temperature and at the same time have negligible effect on the melting point of ceramic particles.
Yes, there is such a means - it is pressure. Pressure sintering makes it possible to obtain dense ceramic products at relatively low temperatures. The problem is that pressure sintering requires special equipment (see hot pressing and hot isostatic pressing methods).
Hi Dr. Akhilesh Kumar Singh, as Dr. Vadim Verlotski mentioned, you can use pressure to reduce the sintering temperature. Spark plasma sintering is also a great method that uses pressure and the sintering temperature is lowered. In addition, microwave sintering is a novel method to reduce sintering temperature.
You can also reduce the sintering temperature if you increase the relative green density of the samples. Different methods can be used for that, for example, slip casting, tape casting, and the use of multi-modal powder particle size distribution.
You can visit my profile and find the links to some articles we published containing the ideas I mentioned above.
- Badges
- Science topic
- Similar topics
- Engineering
- Electrical Engineering
- Electrodes