BS EN ISO 21814-2022 (2023) PDF

Full title and description

STB BS EN ISO 21814-2022 (2023) — Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods for chemical analysis of aluminium nitride powders. This document is the EN/BS national adoption of ISO 21814 (originally published by ISO in 2019) and specifies validated chemical‑analysis methods for aluminium nitride (AlN) powders used as raw material in advanced ceramics production.

Abstract

This standard specifies procedures for the determination of aluminium, total nitrogen and a range of metallic and non‑metallic impurities (including B, Ca, Cu, Fe, Mg, Mn, Mo, Ni, K, Si, Na, Ti, W, V, Zn, Zr, C, Cl, F and O) in aluminium nitride powders. Methods include acid pressure decomposition with CyDTA–zinc back titration or acid digestion with ICP‑OES for aluminium; several routes for total nitrogen (acid decomposition/distillation titration or inert‑gas fusion); ICP‑OES, AAS or flame emission for many metal impurities; combustion or inert‑gas fusion methods for C and O; and pyrohydrolysis followed by ion chromatography or spectrophotometry for Cl and F. Reporting, sample preparation and quality controls are also covered.

General information

• Status: Published (EN adoption / national implementations available).
• Publication date: EN adoption published November 2022; BS national designation published early 2023 (BS adoption dated February 2023 in national catalogue entries).
• Publisher: International origin: ISO (ISO 21814:2019). European adoption: CEN as EN ISO 21814:2022; national adoptions published by national bodies (e.g., BSI for BS EN ISO 21814).
• ICS / categories: 81.060.30 — Advanced ceramics / fine ceramics.
• Edition / version: EN ISO 21814:2022 (identical to ISO 21814:2019). National BS designation carries the EN ISO 21814:2022 text as BS EN ISO 21814:2022 (national publication in 2023).
• Number of pages: Approximately 45–47 pages depending on the national publication format.

Scope

The standard applies to the chemical analysis of fine aluminium nitride powders used as feedstock for fine/advanced technical ceramics. It defines sample preparation, decomposition/digestion procedures, analytical techniques, calibration, blank determination, analysis of a broad list of metallic and non‑metallic elements and the reporting of results necessary to ensure reproducible, comparable compositional data for quality control and material specification.

Key topics and requirements

• Validated analytical routes for aluminium determination: acid pressure decomposition with CyDTA–zinc back titration or acid digestion with ICP‑OES.
• Multiple accepted methods for total nitrogen: decomposition/distillation with acidimetric titration or inert‑gas fusion with thermal conductivity detection.
• Determination of a wide range of metallic impurities (B, Ca, Cu, Fe, Mg, Mn, Mo, Ni, K, Si, Na, Ti, W, V, Zn, Zr) primarily by ICP‑OES after suitable decomposition; alternatives such as AAS or flame emission where specified.
• Carbon and oxygen determination by combustion or inert‑gas fusion techniques (IR or conductometric detection as applicable).
• Halogen analysis (chlorine, fluorine) by pyrohydrolysis followed by ion chromatography or spectrophotometry.
• Requirements for sampling, sample drying, weighing, replicates, blank tests, calibration procedures and reporting of uncertainty and detection limits.
• Conformance: the standard is intended to give reproducible procedures for laboratory and quality‑control testing of AlN powders to support materials specification and R&D.

Typical use and users

Manufacturers of aluminium nitride powders, suppliers of advanced ceramics, analytical laboratories, R&D departments in ceramics and electronics industries, quality assurance teams, and standards/technical committees use this standard to define and harmonize chemical testing methods for AlN raw materials. It supports procurement specifications, batch release testing and inter‑laboratory comparisons.

Related standards

This EN/BS adoption is identical to ISO 21814:2019 and replaces or supersedes earlier EN test methods for AlN (for example EN 725‑4:2006, which is superseded by the EN ISO adoption). Users should consult ISO 21814:2019 and any national implementation documents for local forewords or national deviations.

Keywords

aluminium nitride; AlN; fine ceramics; advanced ceramics; chemical analysis; ICP‑OES; atomic absorption; inert‑gas fusion; CyDTA titration; pyrohydrolysis; total nitrogen; oxygen determination; powder quality control.

FAQ

Q: What is this standard?

A: It is the EN/BS national adoption of ISO 21814 titled "Fine ceramics — Methods for chemical analysis of aluminium nitride powders", providing standardized laboratory methods for compositional testing of AlN powders.

Q: What does it cover?

A: The standard covers sample preparation, decomposition/digestion procedures, analytical methods (ICP‑OES, AAS, combustion, inert‑gas fusion, titration, ion chromatography), calibration, blank testing and reporting requirements for a broad set of elements and impurities in aluminium nitride powders.

Q: Who typically uses it?

A: Powder manufacturers, ceramic component producers, independent testing laboratories, R&D teams and QA/QC personnel who need reproducible, comparable chemical analysis methods for AlN feedstocks.

Q: Is it current or superseded?

A: The EN adoption (EN ISO 21814:2022) is current and is the accepted European/national implementation of ISO 21814:2019; it superseded earlier EN methods such as EN 725‑4:2006. National BS publication of the EN text appeared in early 2023 as BS EN ISO 21814:2022.

Q: Is it part of a series?

A: It sits within ISO/CEN work on fine/advanced ceramics (ICS 81.060.30) and replaces older EN test parts for ceramic powders; related standards cover other materials, test methods and specific properties of advanced ceramics. Consult national catalogues for directly related EN/ISO test parts.

Q: What are the key keywords?

A: aluminium nitride, AlN, fine ceramics, chemical analysis, ICP‑OES, inert‑gas fusion, CyDTA, titration, pyrohydrolysis, oxygen determination.