This standard specifies the technical properties and inspection rules of high-purity graphite. This standard is applicable to high-purity graphite with an ash content of less than 1000ppm. JB/T 2750-1991 High-purity graphite JB/T2750-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of ChinabzxZ.net
JB/T2750
1991-10-24
Zhang Xianji
1992-10-01Xiaohuang
Jijiakuiluwayixian
1 Subject Content and Applicable Scope
This standard specifies the technical performance and inspection rules of high-purity graphite. This standard is applicable to high-purity graphite with a content of less than 1000ppm. Cited standards
GB1994
GB 2828
Test methods for physical and chemical properties of electrical carbon products Remote batch inspection and registration Sampling procedures and sampling tables 2RK10001 Classification and model compilation method of carbon graphite products JB 5877
Analysis method of calcium content in carbon graphite products
Model and its applicable scope
High purity graphite model and its applicable scope See Article 5.7 of ZBK10001. 4 Technical requirements
The technical properties of high-purity graphite shall comply with the requirements of Table 1. Table 1
Calcium content
Volume density
True density
Compressive strength
JB/T2750
JB2750
Flexural strength
Resistivity
High-purity graphite wool shall not have oxidation, cracks and surface impurities. The surface defects and corner notches of the wool shall not exceed the requirements of Table 2. 4.2
Surface defects
Maximum side length of the south diameter
1991-10-24
Corner notches!
1992-10-01 Small cable
Straight or maximum length
5 Test methods
JB/T2750
Continued Table 2
Surface defects
According to the use defects
The ash content, sulfur content, bulk density, true density, compressive strength, flexural strength and resistivity test methods of high-purity graphite shall be carried out in accordance with GB1994, and the calcium content test method shall be carried out in accordance with JB5873, and the inspection rules shall be laid
61 The ash content, sulfur content, calcium content, bulk density, true density, compressive strength, flexural strength and resistivity of high-purity graphite shall be the batch factory inspection items.
6,2 According to the needs of users, when the product is used in occasions that do not require high purity, the sulfur content and calcium content may not be factory inspection items. 6.3 During the inspection and acceptance according to Table 1, the sampling method shall be carried out according to GB2828, and the secondary inspection shall be adopted. The special inspection level is S-3. AQL=6.5.
7 Marking Packaging, Storage and Transportation
After the high-purity graphite passes the inspection, the inspection department shall issue a certificate of conformity, which shall indicate: 7.1
Product name and model:
Product batch number!
Standard number:
Issuance date:
Stamp of the full-time inspector and the special stamp of the technical inspection department. 7.2 High-purity graphite shipped out of the factory should be packed in moisture-proof paper or plastic bags, and should be marked with words such as "fragile, moisture-proof". 7.3
High-purity graphite should be stored in a dry warehouse to avoid being damaged. Additional notes:
This standard is proposed and managed by Harbin Electrocarbon Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Harbin Electrocarbon Research Institute of the Ministry of Machinery and Electronics Industry. The main drafter of this standard is Liu Xiaowei.
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