Infoteenus
81 KLAASI- JA KERAAMIKA-TÖÖSTUS
Uued standardid
ISO 21068-4:2024
Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon — Part 4: XRD methods
Käsitlusala:
This document describes methods for the determination of mineralogical phases typically apparent in nitride and oxy-nitride bonded silicon carbide refractory products using a Bragg-Brentano diffractometer.
It includes details of sample preparations and general principles for qualitative and quantitative analyses of mineralogical phase composition. Quantitative determination of α-Si3N4, β-Si3N4, Si2ON2, AlN, and β’- SiAlON are described.
For quantitative determination of α-Si3N4, β-Si3N4, Si2ON2, AlN and β’-SiAlON refinement procedures based on the total nitrogen content of the sample are described.
NOTE ISO 21068-3 is used for the analysis of the total nitrogen content of the sample.
It includes details of sample preparations and general principles for qualitative and quantitative analyses of mineralogical phase composition. Quantitative determination of α-Si3N4, β-Si3N4, Si2ON2, AlN, and β’- SiAlON are described.
For quantitative determination of α-Si3N4, β-Si3N4, Si2ON2, AlN and β’-SiAlON refinement procedures based on the total nitrogen content of the sample are described.
NOTE ISO 21068-3 is used for the analysis of the total nitrogen content of the sample.
Alusdokumendid:
EVS-EN ISO 8840:2024
Refractory materials - Determination of bulk density of granular materials (grain density) (ISO 8840:2021)
Käsitlusala:
This document specifies three methods for the determination of the bulk density of granular
refractory materials (grain density) having a grain size larger than 2 mm:
— Method 1: mercury method with vacuum;
— Method 2: arrested water absorption method;
— Method 3: vacuum method with spin dryer option according to ISO 5017.
Method 1 is intended as the reference method.
NOTE Depending on the nature of the material tested, the three methods can give different results.
Any statement of the value of a bulk density can therefore be accompanied by an indication of the
method used or to be used in case of dispute.
The same method can be used for the determination of the volume of the sample, for selecting and
preparing the sample, for
calculating the bulk density and for presenting the test report.
refractory materials (grain density) having a grain size larger than 2 mm:
— Method 1: mercury method with vacuum;
— Method 2: arrested water absorption method;
— Method 3: vacuum method with spin dryer option according to ISO 5017.
Method 1 is intended as the reference method.
NOTE Depending on the nature of the material tested, the three methods can give different results.
Any statement of the value of a bulk density can therefore be accompanied by an indication of the
method used or to be used in case of dispute.
The same method can be used for the determination of the volume of the sample, for selecting and
preparing the sample, for
calculating the bulk density and for presenting the test report.
Alusdokumendid:
ISO 8840:2021; EN ISO 8840:2024
Asendab:
EVS-EN 993-18:2002
ISO 21068-3:2024
Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon — Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents
Käsitlusala:
This document specifies analytical techniques for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and metallic and oxidic components in silicon carbide raw materials and refractory products.
Alusdokumendid:
Asendab:
ISO 21068-3:2008
ISO 21068-2:2024
Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon — Part 2: Determination of volatile components, total carbon, free carbon, silicon carbide, total and free silicon, free and surface silica
Käsitlusala:
This document specifies analytical techniques for the determination of volatile components by thermal treatment at specified temperatures, and methods for the determination of the total carbon, free carbon, silicon carbide, total and free silicon and free and surface silica content of silicon-carbide, silicon-nitride and silicon-oxynitride containing raw materials and refractory products.
Alusdokumendid:
Asendab:
ISO 21068-2:2008
Asendatud standardid
EVS-EN 993-18:2002
Methods of test for dense shaped refractory products - Part 18: Determination of bulk density of granular materials by the water method with vacuum
Käsitlusala:
This European Standard specifies a method based on water absorption with vacuum for the determination of the bulk density of granular refractory materials (grain bulk density) having a grain size greater than 2 mm
Alusdokumendid:
EN 993-18:2002
Asendatud:
EVS-EN ISO 8840:2024
ISO 21068-2:2008
Chemical analysis of silicon-carbide-containing raw materials and refractory products -- Part 2: Determination of loss on ignition, total carbon, free carbon and silicon carbide, total and free silica and total and free silicon
Käsitlusala:
ISO 21068-2:2008 specifies analytical techniques for the determination of change in mass by thermal treatment at specified temperatures, and methods for the determination of the total carbon content, free carbon, silicon carbide, silicon, total silica and free silica content of silicon-carbide-containing raw materials and refractory products.
Alusdokumendid:
Asendatud:
ISO 21068-2:2024
ISO 21068-3:2008
Chemical analysis of silicon-carbide-containing raw materials and refractory products -- Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents
Käsitlusala:
ISO 21068-3:2008 specifies methods for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and free metallic and oxidic components in silicon carbide raw materials and refractory products.
It applies only to silicon carbide materials that are not bonded with nitrogen. Nitride-bonded silicon carbide refractories are covered in EN 12698-1.
It applies only to silicon carbide materials that are not bonded with nitrogen. Nitride-bonded silicon carbide refractories are covered in EN 12698-1.
Alusdokumendid:
Asendatud:
ISO 21068-3:2024
Kavandid
prEN ISO 21971
Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical properties of ceramic composites at ambient temperature in air atmospheric pressure - Determination of hoop tensile properties of tubes (ISO 21971:2019)
Käsitlusala:
This document specifies the conditions for the determination of hoop tensile properties of ceramic
matrix composite (CMC) tubes with continuous fibre-reinforcement at ambient temperature in air
atmospheric pressure. This document is specific to the tubular geometries since fibre architecture and
specimen geometry factors in composite tubes are distinctly different from those in flat specimens.
This document provides information on the hoop tensile properties and stress-strain response, such
as hoop tensile strength, hoop tensile strain at failure and elastic constants. The information can be
used for material development, control of manufacturing (quality insurance), material comparison,
characterization, reliability and design data generation for tubular components.
This document addresses, but is not restricted to, various suggested test piece fabrication methods.
It applies primarily to ceramic and/or glass matrix composite tubes with a continuous fibrous-
reinforcement: unidirectional (1D filament winding and tape lay-up), bi-directional (2D braid and
weave) and tri-directional (xD, with 2 < x < 3), subjected to an internal pressure.
Values expressed in this document are in accordance with the International System of Units (SI).
matrix composite (CMC) tubes with continuous fibre-reinforcement at ambient temperature in air
atmospheric pressure. This document is specific to the tubular geometries since fibre architecture and
specimen geometry factors in composite tubes are distinctly different from those in flat specimens.
This document provides information on the hoop tensile properties and stress-strain response, such
as hoop tensile strength, hoop tensile strain at failure and elastic constants. The information can be
used for material development, control of manufacturing (quality insurance), material comparison,
characterization, reliability and design data generation for tubular components.
This document addresses, but is not restricted to, various suggested test piece fabrication methods.
It applies primarily to ceramic and/or glass matrix composite tubes with a continuous fibrous-
reinforcement: unidirectional (1D filament winding and tape lay-up), bi-directional (2D braid and
weave) and tri-directional (xD, with 2 < x < 3), subjected to an internal pressure.
Values expressed in this document are in accordance with the International System of Units (SI).
Alusdokumendid:
ISO 21971:2019; prEN ISO 21971