GB/T 16555-2025 Chemical analysis of refractories containing carbon,silicon carbide or nitride

Scope

This document describes the chemical analysis methods for carbon-containing, silicon carbide, and nitride refractory materials, including heat treatment reduction, char loss, volatile matter, total carbon, free carbon, silicon carbide content, total nitrogen, total oxygen, silicon nitride content, free silicon, free aluminum, iron oxide content, alumina content, and other oxide quantities.
This document is applicable to the chemical analysis of carbon-containing, silicon carbide, and nitride refractory materials, such as magnesia-carbon bricks, semi-graphite carbon bricks, aluminum-zirconium carbon bricks, carbon-containing silicon carbide castables, and silicon nitride-bonded silicon carbide bricks, etc.

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