ISO 3262-20:2021 PDF

Extenders — Specifications and methods of test — Part 20: Fumed silica

Название (английский):

ISO 3262-20:2021

Extenders — Specifications and methods of test — Part 20: Fumed silica

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 15 марта 2021 г.
Издание:: ISO IS 3262 edition 2 version 1
ICS:: 87.060.10

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Описание (английский):

This document specifies requirements and corresponding methods of test for fumed silica.

Технические детали

Технический комитет: ISO/TC 256 - Pigments, dyestuffs and extenders
SKU: ISO 3262-20:2021

Abstract

Overview

ISO 3262-20:2021 - “Extenders - Specifications and methods of test - Part 20: Fumed silica” specifies quality requirements and corresponding laboratory test methods for fumed (pyrogenic) silica used as an extender or raw material. The second edition updates classification, test methods and limits for critical parameters such as silica content, inorganic oxide impurities, carbon and chloride content, loss on ignition and pH. It also defines sampling and analytical procedures to ensure consistent product quality.

Key topics and technical requirements

Scope: Requirements and test methods specifically for fumed silica (amorphous silica produced by high‑temperature flame hydrolysis).
Quality grades: The standard distinguishes at least two grades (e.g., Grade A and Grade B) with different limits for certain properties.
Principal characteristics and limits (examples from Table 1):
- Silica content: minimum 99.8% (by mass).
- Oxide impurities: maximums for Al2O3 (~0.05%), TiO2 (~0.03%) and Fe2O3 (~0.003%).
- Carbon content: criteria differentiating grades (e.g.,

Overview

Key topics and technical requirements

Scope: Requirements and test methods specifically for fumed silica (amorphous silica produced by high‑temperature flame hydrolysis).
Quality grades: The standard distinguishes at least two grades (e.g., Grade A and Grade B) with different limits for certain properties.
Principal characteristics and limits (examples from Table 1):
- Silica content: minimum 99.8% (by mass).
- Oxide impurities: maximums for Al2O3 (~0.05%), TiO2 (~0.03%) and Fe2O3 (~0.003%).
- Carbon content: criteria differentiating grades (e.g.,

ISO 3262-20:2021 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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