BS EN ISO 18754-2022 PDF

Full title and description

BS EN ISO 18754:2022 — Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of density and apparent porosity. This British/European adoption of ISO 18754 specifies standardised laboratory methods to measure apparent solid density, bulk density, apparent porosity and geometric bulk density of fine ceramics, including ceramic‑matrix composites, using liquid displacement (Archimedes) and geometric measurement techniques.

Abstract

Specifies two methods for determining density and apparent porosity of fine/advanced ceramics: Method A (Archimedes liquid displacement) for bulk density, apparent solid density and apparent porosity, and Method B (geometric dimensions + mass) for bulk density only. The standard gives sample preparation guidance, measurement procedures, calculation formulas and notes on method limitations (e.g., Method A is not suitable for apparent porosity > 10 %, for average pore sizes > 600 µm, and may be unreliable for open porosity < 0.5 %).

General information

• Status: Current / Definitive (EN adoption of ISO 18754)
• Publication date: 30 September 2022 (BS publication; ISO original edition: 30 April 2020 — ISO 18754:2020)
• Publisher: British Standards Institution (BSI) — adopted from International Organization for Standardization (ISO)
• ICS / categories: 81.060.30 — Advanced ceramics
• Edition / version: EN ISO 18754:2022 (identical to ISO 18754:2020, Edition 3)
• Number of pages: 20 (BS edition, approx.)

Scope

Applies to fine ceramics (advanced/technical ceramics) including ceramic‑matrix composites. Defines standard procedures to determine apparent solid density, bulk density, apparent porosity and geometric bulk density. Two measurement routes are given: a liquid displacement (Archimedes) method for density and porosity and a geometric method for bulk density where dimensional measurement is appropriate. Notes state limitations for high‑porosity materials, very large pores and very low open porosity.

Key topics and requirements

• Definition of terms: apparent solid density, bulk density, apparent porosity, geometric bulk density.
• Method A — liquid displacement (Archimedes): apparatus, liquid selection, sample conditioning, measurement steps and calculations.
• Method B — geometric measurement: dimensional measurement procedures, mass measurement and calculation of bulk density.
• Sample preparation and conditioning (drying, handling, representative sampling).
• Calculation examples and formulae for densities and porosity, including expression of results and significant figures.
• Uncertainty, applicability limits and guidance on when each method is appropriate (e.g., Method A not recommended for apparent porosity > 10 % or average pore size > 600 µm).
• Reporting requirements and recommended test records.

Typical use and users

Used by materials testing laboratories, ceramic manufacturers, R&D groups, quality assurance/quality control teams, universities and standards bodies for routine characterisation and acceptance testing of fine ceramics and ceramic‑matrix composites. Employed where precise density/porosity data are needed for performance prediction, process control or comparative material assessment.

Related standards

ISO 18754:2020 (international edition — identical technical content), earlier national/adopted versions (EN ISO 18754:2022, BS EN 1389:2003 and BS EN 623‑2:1993 which it replaces/updates in part), ASTM C373 (water absorption, bulk density and apparent porosity tests for ceramics — comparable methods used in some industries), and other ISO/TC 206 publications on ceramics and test methods.

Keywords

fine ceramics, advanced ceramics, technical ceramics, ceramic‑matrix composites, density, bulk density, apparent solid density, apparent porosity, geometric bulk density, Archimedes method, porosity testing, materials characterisation, test method

FAQ

Q: What is this standard?

A: BS EN ISO 18754:2022 is the British/European adoption of ISO 18754 describing standard methods to measure density and apparent porosity of fine and advanced ceramics.

Q: What does it cover?

A: It covers two measurement methods — liquid displacement (Archimedes) for bulk density, apparent solid density and apparent porosity, and geometric dimension/mass measurement for bulk density — plus sample preparation, calculations, limitations and reporting.

Q: Who typically uses it?

A: Materials testing labs, ceramic manufacturers, R&D and QA/QC personnel, and academic researchers working with advanced ceramics and ceramic‑matrix composites.

Q: Is it current or superseded?

A: It is current. The EN/BS edition was published in 2022 and adopts the ISO 18754:2020 edition (Edition 3, published April 30, 2020). It replaces older national EN/BS references such as EN 1389 and EN 623‑2 where applicable.

Q: Is it part of a series?

A: It is part of ISO/TC 206’s suite of standards for fine/advanced ceramics and complements other ISO standards on ceramic test methods and material characterisation; it follows the ISO numbering and edition system for ceramics test standards.

Q: What are the key keywords?

A: Density, apparent porosity, bulk density, Archimedes method, fine ceramics, advanced ceramics, geometric bulk density, ceramic‑matrix composites.