SJ/T 10557.1-1994 Technical requirements for aluminum foil for electrolytic capacitors SJ/T10557.1-1994 Standard download decompression password: www.bzxz.net

Electronic Industry Standard of the People's Republic of China
SJ/T10557.1—94
Technical conditions for aluminium foil for electrolytic capacitors
Specification for aluminium foil for electrolytic capacitors1994-08-08 Issued
Implementation on 1994-12-01
Issued by the Ministry of Electronics Industry of the People's Republic of China Electronic Industry Standard of the People's Republic of China
Technical conditions for aluminium foil for electrolytic capacitors
Specificationfor aluminiumfoil for electrolytic capacitor Subject content and scope of application
SJ/T10557.1-94
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of aluminium foil for electrolytic capacitors.
This standard applies to anode foil for high-voltage electrolytic capacitors (hereinafter referred to as high-voltage original box), anode foil for low-voltage electrolytic capacitors (hereinafter referred to as low-voltage original foil) and cathode box for electrolytic capacitors (hereinafter referred to as cathode box). Cited standards
GB3199
GB6987
Metal tensile test methods
Packaging, marking, transportation and storage of aluminum and aluminum alloy processed products Series of standards for chemical analysis methods of aluminum and aluminum alloys Test methods for aluminum foil for electrolytic capacitors
SJ/T10557.2~10557.4
3 Technical requirements
3.1 Dimensions and allowable deviations
The thickness, allowable thickness deviation and width of the aluminum foil shall comply with the provisions of Table 1. 3.1.1
0.015~0.020
0.040~0.050
0.070~0.0105
0.120~0.150
0.180~0.200
Thickness tolerance
Note: Other specifications of foil can be supplied upon agreement between the supplier and the buyer. 3.1.2 The width tolerance of aluminum foil shall comply with the provisions of Table 2. Approved by the Ministry of Electronics Industry of the People's Republic of China on August 8, 1994 Width
40~1000
90~1000
Implemented on December 1, 1994
<200 (excluding 200)
200~600 (excluding 600)
Note: The contract supply width shall be agreed upon by both parties 3.2 Chemical composition
SJ/T10557.1--94
3.2.1 The chemical composition of high-voltage raw foil and low-voltage raw foil shall comply with the provisions of Table 3. Table 3
0.0025~0.0050
Note: The chemical composition of cathode foil shall comply with the provisions of Table 4. Table 4
Note: The chemical composition of cathode foil shall comply with the provisions of Table 4. Table 4
Note: The chemical composition of cathode foil shall comply with the provisions of Table 4. 3.3 Mechanical properties
The longitudinal room temperature mechanical properties of aluminum foil shall comply with the requirements of Table 5. 2
0.015~0.090
0.100~0.200
3.4 ​​Crystal structure properties
SJ/T10557.194
Tensile strength
3.4.1 The average surface dislocation density of the soft state high-voltage original box is not more than 106/cm. 3.4.2 The (100) crystal plane occupancy rate of the soft state high-voltage original box is not less than 80%. 3.4.3 The surface oxide film thickness of the soft state high-voltage original foil is not more than 6nm. Note: Box materials with other parameters can be supplied upon agreement between the supply and demand parties. 3.5 Surface quality
Not less than
Elongation
The surface of the aluminum foil should be clean, without corrosion marks, bubbles, serious non-metallic indentations and fish scales, and scratches and abrasions with a depth exceeding half of the negative thickness deviation. For annealed aluminum foil, the edges are not allowed to have serious yellow oil spots, and the surface should not be rough.
The surface of the aluminum foil should be flat, without protruding kelp-like and serious marks on the edges and burrs on the edges. The end face of the aluminum foil roll should be neat, without bruises and dirt, and the entire length of the box should be easy to unfold without sticking and tearing. There should be no blocky bright spots after corrosion of the lead foil.
3.6 Other requirements
Aluminum foil for electrolytic capacitors should be wound on clean steel (or aluminum) tubes. The inner diameter of the tube is 75±1mm, the outer diameter is not more than 80mm, the length of the steel tube should be 5~10cm greater than the foil width (the aluminum tube and the foil are of the same width), and the aluminum foil roll is not allowed to slide between layers or fall out of the tube when it is held upright.
The number of broken ends in the aluminum foil shall not exceed one per roll, and the broken ends shall be clearly marked. 4 Test methods
4.1 Dimension measurement method
Foil materials with a thickness of 0.003~0.05mm are measured with a spherical micrometer with an accuracy of 0.5um. The micrometer should have a measuring pressure of no more than 250g and a spherical measuring head with a radius of 16~20mm: Foil box materials with a thickness greater than 0.05mm are measured with a micrometer with a scale value of not less than 0.01mm, or other measuring instruments with equal accuracy. 4.2 Chemical composition analysis and arbitration method
The chemical composition test and analysis method of aluminum foil for electrolytic capacitors can be carried out according to SJ/T10557.4 or GB6987. When there is a disagreement between the supply and demand parties, the arbitration analysis method shall be carried out according to the relevant sub-standards of GB6987. 4.3 Room temperature mechanical properties test method
The longitudinal room temperature mechanical properties of the aluminum foil of the electrolytic capacitor shall be carried out according to GB228. The sample size is 15mm wide and 170mm long.
4.4 Crystal structure test method
SJ/T10557.1-94
The surface average dislocation density of the soft state high voltage original foil shall be measured according to SJ/T10557.3. The surface (100) grain occupancy rate of the soft state high voltage original foil shall be measured according to SJ/T10557.2. The surface oxide film measurement of the soft state high voltage original foil shall be carried out according to Appendix A (reference). 4.5 Surface quality inspection
The visual method is used to inspect each roll, and the roll to be inspected should be opened 1 to 3m. 5 Inspection rules
5.1 Inspection and acceptance
The aluminum box should be inspected and accepted by the supplier's technical supervision department, and the product quality should be guaranteed to meet the requirements of this standard. 5.2 Batch
Aluminum foil for electrolytic capacitors should be submitted for inspection in batches. Each batch should be composed of the same alloy, the same state and specifications, and should come from the same furnace. The batch weight is not limited.
5.3 Inspection items
Each batch of aluminum foil for electrolytic capacitors should be inspected for chemical composition, size, allowable deviation and surface quality. Room temperature mechanical properties and crystal structure properties are not inspected. If inspection is required, it should be specified in the contract. 5.4 Repeated test
When the test result of the room temperature mechanical properties test or the crystal structure test fails, double the number of samples should be taken from the roll for repeated testing. If the re-test still fails, the roll will be scrapped. Then the remaining rolls of the batch are tested one by one, and those that meet the standards are delivered, and those that do not meet the standards are discarded.
5.5 Sampling location and number of samples
Chemical composition arbitration analysis sampling can be cut from any part of the foil roll. If the contract requires other performance tests, 2% of the rolls (not less than 2 rolls) should be drawn from each batch, and three samples should be cut from each roll.
6 Marking, packaging, transportation, storage
6.1 Marking
The packaging box marking of aluminum foil for electrolytic capacitors should comply with the provisions of GB3199. Labels should be added to the accepted aluminum foil boxes for electrolytic capacitors, indicating:
Alloy grade:
Chemical composition;
Supply status;
Batch number;
Specifications;
Box length:
Weight,
Inspection stamp of the quality supervision department.
6.2 Packaging, transportation and storage
The packaging, transportation and storage of aluminum foil for electrolytic capacitors shall comply with the provisions of GB3199. 6.3 Quality certificate
SJ/T10557.1—94
Each batch of aluminum foil for electrolytic capacitors shall be accompanied by a quality certificate that meets the requirements of this standard, which shall indicate: a.
Supply name;
Alloy grade:bzxZ.net
Chemical composition;
Supply status;
Box roll length;
Weight;
Specification,
Batch number:
Seal of quality supervision department;
Production date;
This standard number.
A1 Scope
SJ/T10557.1—94
Appendix A
Method for measuring the thickness of oxide film on the surface of aluminum foil by laser circular polarization method (reference)
This method is applicable to the determination of the thickness of oxide film on the surface of soft high-voltage raw foil. A2
Test equipment
Laser ellipsometer: Measuring range: 0~300nm; Accuracy: ±1nm;
Polarizer rotation angle: 0~180°;
Quarter wave plate rotation angle: -90°～90°Analyzer rotation angle: -90°90%
Laser incident angle ≤90°
A3 Sample size
Rectangular sample: 10~20mm long, 10~20mm wide; circular sample: 1020mm in diameter.
A4 Schematic diagram of the method
Figure A1 Schematic diagram of the method for measuring the thickness of the surface oxide film 1. Laser; 2. Laser exit light bar; 3. Polarizer; 4. Polarizer reading microscope; 5. Quarter wave plate; 6. Quarter wave plate reading microscope, 7. Incident light bar; 8. Sample to be tested; 9. Sample stage; 10. Exit light bar, 11. Analyzer; 12. Analyzer reading microscope; 13. Galvanometer light bar; 14. Photomultiplier tube and galvanometer. A5 Measurement
A5.1 Measurement preparation
SJ/T 10557.194
A5.1.1 Before measurement, adjust the alignment of the laser optical axis and the galvanometer optical axis to ensure that the exit light is received by the galvanometer. A5.1.2 The refractive index and light absorption coefficient of the aluminum foil material matrix should be obtained before the experiment. A5.2 According to the method of measuring the film thickness by laser ellipsometry, the corresponding parameters of the oxide layer on the surface of the aluminum foil are measured. When measuring, an appropriate laser can be selected to obtain a specific wavelength (such as He-Ne laser), or an appropriate photomultiplier tube and galvanometer can be selected according to the experiment.
A5.3 In order to eliminate experimental errors, a laser beam with variable angle incidence (such as 50°, 60°, 70° incidence) is used to perform corresponding measurements to obtain the corresponding parameters at each angle.
A5.4 The measured parameters are processed together with the known optical refractive index, light absorption coefficient of the aluminum foil material and the optical refractive index of air to determine the thickness of the oxide film on the surface of the aluminum foil. Additional notes:
This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by the 46th Institute of the Ministry of Electronics Industry. The main drafters of this standard are: Zhang Shimin and Li Guiquan. 7
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