ISO 8008:2005 PDF
Aluminium oxide primarily used for the production of aluminium — Determination of specific surface area by nitrogen adsorption
Aluminium oxide primarily used for the production of aluminium — Determination of specific surface area by nitrogen adsorption
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 7
- Дата публикации:
- 1 ноября 2005 г.
- Издание:
- ISO IS 8008 edition 2 version 1
- ICS:
- 71.100.10
ISO 8008:2005 specifies an instrumental method for the determination of specific surface area of smelter-grade alumina by nitrogen adsorption by a single- or multi-point method. A multi-point method is recommended due to the higher accuracy obtained; if a single-point method is used, a lower result will be obtained. ISO 8008:2005 is applicable to aluminas having a surface area between 50 m2/g and 90 m2/g.
Abstract
Overview
ISO 8008:2005 specifies an instrumental laboratory method to determine the specific surface area (SSA) of smelter‑grade alumina (aluminium oxide) used in primary aluminium production. The method uses nitrogen adsorption at liquid‑nitrogen temperature and the Brunauer‑Emmett‑Teller (BET) theory to calculate surface area. ISO 8008:2005 applies to aluminas with SSA in the range 50–90 m2/g and recommends a multi‑point BET analysis for greater accuracy (single‑point is permitted but gives lower results).
Key topics and technical requirements
- Measurement principle: adsorption of N2 at −196 °C to determine monolayer volume and derive SSA using BET theory.
- Degassing: samples degassed at 150 °C (vacuum or flowing N2). Vacuum system must maintain
Технические детали
- Технический комитет
- ISO/TC 226 - Materials for the production of primary aluminium
- SKU
- ISO 8008:2005
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