Method for the determination of specific resistance of carbon raw materials and coke
1 Scope
This standard specifies the method for the determination of specific resistance of carbon raw materials and coke.
This standard is applicable to the determination of specific resistance of carbon raw materials such as calcined anthracite, graphite, baked scrap, calcined petroleum coke, graphitized coke and needle coke as well as coke.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1997 Coke - Sampling and preparation of samples
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Principle
Put the dry specimen with a certain particle size into the specimen tank, and introduce the current with a certain strength under a certain pressure, then measure the voltage drop at both ends of the specimen, and calculate the specific resistance of the specimen according to Ohm's law.
4 Instruments and apparatus
4.1 Specific resistance measurer for powder
4.1.1 Test device, with the schematic diagram shown in Figure 1.
Foreword i
1 Scope
2 Normative references
3 Principle
4 Instruments and apparatus
5 Sampling and preparation of specimen
6 Test procedures
7 Result calculation
8 Precision
9 Inspection report
