GB/T 3298-2022 Test method for resistance to thermal shock of domestic ceramic ware English, Anglais, Englisch, Inglés, えいご
1 Scope
This document describes a method for testing the resistance to thermal shock of domestic ceramic ware by temperature change.
This document is applicable to domestic ceramic ware.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 5000 Terminology for domestic ceramics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5000 apply.
4 Principle
Obtain whether the domestic ceramic ware is cracked or damaged by subjecting it to rapid changes in external temperature to determine its resistance to thermal shock.
5 Reagents or materials
5.1 Specimen basket or specimen fixture.
5.2 Dyeing solution (such as ink or methylene blue solution), brush.
6 Instruments and equipment
6.1 Heating furnace: a furnace having sufficient heating speed to return to the test temperature within 15min after the specimen is placed inside, and capable of controlling the temperature variation within the working area within ±5℃.
6.2 Flowing water tank: a tank capable of maintaining flowing water at a temperature of 20℃±2℃. The mass ratio of water to specimen in the tank shall be greater than 10:1. After the specimen is immersed, the water level shall be approximately 20mm above the specimen, and the temperature rise of water shall not exceed 4℃.
7 Samples
At least 5 samples shall be selected from products of the same production batch, and the same specification and type. The samples shall be free from defects such as cracks or damage.
8 Test procedure
8.1 Pre-test inspection
Apply a suitable dyeing solution (see 5.2) to the surface of samples and wipe the solution after they are slightly dry. Then, visually inspect the samples from a distance of 25cm to 35cm under a light source with an illuminance of approximately 300lx. Take samples free of defects such as cracks or damage as the specimens.
8.2 Pass/fail test
8.2.1 Start the heating furnace and set the control temperature according to the requirements for resistance to thermal shock as specified in the product standard or agreed in the contract.
8.2.2 Start the temperature control system of the flowing water tank.
8.2.3 Fix the specimens (see 8.1) in the specimen basket or on the specimen fixture, where the specimens cannot contact each other. On the premise of ensuring the stability of the specimen, reduce the contact between the fixture and the specimen, and keep sufficient clearance allow the flowing water to pass freely.
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents or materials
6 Instruments and equipment
7 Samples
8 Test procedure
9 Test data processing
10 Test report
Annex A (Informative) Calculation examples for thermal shock resistance index and sample standard deviation
GB/T 3298-2022 Test method for resistance to thermal shock of domestic ceramic ware English, Anglais, Englisch, Inglés, えいご
1 Scope
This document describes a method for testing the resistance to thermal shock of domestic ceramic ware by temperature change.
This document is applicable to domestic ceramic ware.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 5000 Terminology for domestic ceramics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5000 apply.
4 Principle
Obtain whether the domestic ceramic ware is cracked or damaged by subjecting it to rapid changes in external temperature to determine its resistance to thermal shock.
5 Reagents or materials
5.1 Specimen basket or specimen fixture.
5.2 Dyeing solution (such as ink or methylene blue solution), brush.
6 Instruments and equipment
6.1 Heating furnace: a furnace having sufficient heating speed to return to the test temperature within 15min after the specimen is placed inside, and capable of controlling the temperature variation within the working area within ±5℃.
6.2 Flowing water tank: a tank capable of maintaining flowing water at a temperature of 20℃±2℃. The mass ratio of water to specimen in the tank shall be greater than 10:1. After the specimen is immersed, the water level shall be approximately 20mm above the specimen, and the temperature rise of water shall not exceed 4℃.
7 Samples
At least 5 samples shall be selected from products of the same production batch, and the same specification and type. The samples shall be free from defects such as cracks or damage.
8 Test procedure
8.1 Pre-test inspection
Apply a suitable dyeing solution (see 5.2) to the surface of samples and wipe the solution after they are slightly dry. Then, visually inspect the samples from a distance of 25cm to 35cm under a light source with an illuminance of approximately 300lx. Take samples free of defects such as cracks or damage as the specimens.
8.2 Pass/fail test
8.2.1 Start the heating furnace and set the control temperature according to the requirements for resistance to thermal shock as specified in the product standard or agreed in the contract.
8.2.2 Start the temperature control system of the flowing water tank.
8.2.3 Fix the specimens (see 8.1) in the specimen basket or on the specimen fixture, where the specimens cannot contact each other. On the premise of ensuring the stability of the specimen, reduce the contact between the fixture and the specimen, and keep sufficient clearance allow the flowing water to pass freely.
Contents of GB/T 3298-2022
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents or materials
6 Instruments and equipment
7 Samples
8 Test procedure
9 Test data processing
10 Test report
Annex A (Informative) Calculation examples for thermal shock resistance index and sample standard deviation
