Precision ceramic electronic hydrometer to measure the bulk density of ceramics after sintering - Database & Sql Blog Articles

The function of a precision ceramic electronic density meter is to measure key properties of ceramic materials accurately and efficiently.

It can directly measure the overall density, open porosity, water absorption, and apparent specific gravity of the material. It also allows for an indirect calculation of closed porosity, which is essential in quality control and material analysis.

There are two primary methods used to determine the bulk density of ceramics after sintering: the boiling method and the saturation method.

Boiling Method:

1. The sample is first placed in a furnace at 150°C to remove any moisture trapped in the pores. This step helps save time by ensuring the sample is fully dried before further testing. The dry weight is recorded as W1.

2. The sample is then submerged in boiling deionized water for about 30 minutes. The goal is to submerge the sample completely under the water surface without touching the bottom or sides. Afterward, it is cooled in water for one hour (this is a simplified version of the process).

Alternatively, the sample may be boiled for 5 hours and then left to cool in water for 24 hours for more thorough saturation.

3. Once the sample has absorbed water, the surface is gently dried, and the wet weight is recorded as W2.

4. The weight of the sample when suspended in water is measured as W3.

5. Finally, the actual body weight of the sample is noted for reference.

Saturation Method:

1. After sintering, the sample is cleaned to remove any outer burrs or powder layers. It is then weighed in its dry state, and the weight is recorded as W1.

2. The sample is placed in a water tank within an automatic vacuum extractor. Under vacuum, the sample absorbs water until it becomes fully saturated. This ensures complete penetration of water into the pores.

3. Once saturated, excess water on the surface is wiped off carefully, and the wet weight is recorded as W2.

4. The sample is then submerged in water again, and its weight is measured as W3.

5. Using these measurements, the density of the ceramic can be calculated precisely.

A precision ceramic electronic hydrometer simplifies this process by allowing direct and accurate measurement of the ceramic’s density after sintering, eliminating the need for complex manual calculations and reducing the risk of human error.