ISO 18754 specifies methods for the determination of the apparent solid density, bulk density, apparent porosity and geometric bulk density of fine ceramics, including all ceramic matrix composites.
Note: The archimedes method does not apply to materials with apparent porosity greater than 10%, open porosity less than 0.5% or which have an average pore size of greater than 600 μm.
ISO 18754 on fine ceramics is relevant to:
The measurement of bulk density during production is a fundamental parameter for the quality of the product. The bulk density provides valuable information needed to control the quality of a ceramic piece (after firing) concerning its final size and the porosity and cracks in the body. It is therefore important that optimum measurement procedures are followed in determining density.
In ceramics, porosity is considered an indication of density, strength, and durability. Porosity is measured by the weight increase when boiled in water.
ISO 18754 describes two methods and are designated as Methods A and B, as follows:
As measuring the density and porosity of ceramics is a fundamental parameter for the quality of the product it must be done very diligently. ISO 18754 helps you in this regard by providing two methods to measure the same and this can ensure you have the necessary valuable information needed to control the quality of a ceramic piece. This will increase the safety and durability of your product and in turn increase credibility and revenue for your organization.
BS ISO 18754:2020 replaces the second edition ISO 18754:2013, which has been technically revised. The main changes compared to ISO 18754:2013 are as follows:
ISO 18754:2020