Some standard content:
ICS 29. 120. 01, 29. 050
National Standard of the People's Republic of China
GB/T 14898--2004
Generation GB/T14898199-1
Graphite for making synthetic diamond
Published on 2004-05-08
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on 2004-12-01
GB/T 14898—2004
31994% Graphite flakes for humane diamond". This standard replaces GB/T14898
The main differences between this standard and GB/T14898-1994 are as follows: This standard is revised in accordance with GB/T1.1-2000 "Guidelines for Standardization Work Part 1: Structure and Writing Rules of Standards".
The classification is revised in accordance with JB/T9580-1999 "Classification and Model Compilation Method of Carbon Graphite Products". The product models have been increased and their basic dimensions have been adjusted accordingly. In terms of the physical and chemical properties of the products, an additional item of forest density has been added to some varieties.
Appendix A of this standard is an informative appendix
This standard was proposed by the China Electrical Equipment Industry Association. This standard is under the jurisdiction of Harbin Electric Carbon Research Institute. The drafting unit of this standard is Harbin Electric Carbon Research Institute. The drafters of this standard are Wang Xiu, Liu Bingshang and Sun Jiagang. This standard was first issued in January 1994. Scope
Graphite for artificial diamond
GB/T 14898—2004
This standard specifies the types, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage and other aspects of graphite for artificial diamond.
This standard applies to graphite for artificial diamond. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB/T2828.1 Sampling inspection procedure by attributes Part 1: Sampling plan for batch inspection based on acceptance quality limit (AQL) JB/T4220 Test method for lattice parameters of artificial stone JB/T8133 Test method for physical and chemical properties of electric carbon products JB/T9580 Classification and model compilation method for carbon graphite products 3 Models and their applicable scopes
The naming of graphite complies with the provisions of JB/T9580, and its models and their applicable scopes are listed in Table 1. Table 1
T642.T643
E Mainly suitable for synthesizing RVD type diamond
Scope of application
Mainly suitable for synthesizing MBL8, MBD12.SMD and DMD type diamond Upper right Mainly suitable for synthesizing SMD) and I>MD) type gold test clothing Upper Mainly suitable for synthesizing MBD, MBD12, SMD and DMD type diamond Mainly suitable for synthesizing MBD8, MBD12, SMD and DMD type diamond Mainly suitable for synthesizing MBD8.MBD12.SMD and DMD type diamond Mainly suitable for synthesizing MBI8, MBD12, SMD and DMD type diamond Raw material Mainly suitable for synthesizing MRD8, MBD12, SMD and DMD type gold brush stone Mainly suitable for synthesizing MBD8, MBDI2, SMD and DMD type gold brush stone GB/T 14898--2004
Technical requirements
The main specifications, dimensions and limit deviations of the stone should comply with the provisions of Table 2, or as specified in the contract. For T612, T621, T641, 4.1
T642, T643, T664, T665, T666 and T692, the lower deviation rate of the outer diameter is allowed to be less than 15%. Table 2
F642.T643bZxz.net
20, 23
Basic size small
20, 22, 23, 25, 27
20,22,2 3,25,28
20, 22.23, 24, 25, 27,
26,30,33.37.38
20,22.23.24,25 ,27.28. 30.3133,35,37,38,41
30.33.37.38.40.41.45.30.55
20.22,23,24,25.27,28,30,31.33.35,37,38,40,41,45.50.5523.24,25,26,27,28.30
If the width of the two end surfaces of the ink sheet should be less than 0.10 mm, the physical and chemical properties of graphite should conform to Table 3.
Limited maturity
Ash content/%
Total porosity/%
29 yuan 1
Basic size
Graphitization degree/%
Unit is meter
Limited error
Volume density/(g/cl)
GB/T14898—2004
4.4 The surface of the graphite sheet shall not have impurities, cracks or fragments, but slight edge and corner loss is allowed. Its length shall not exceed 2mm, width shall not exceed 1mm, and depth shall not exceed one-third of the thickness of the graphite sheet. 5 Test method
5. When testing according to 4.1, 4.2 and 4.4 of this standard, use a micrometer with a graduation value of 0.01mm or a vernier caliper with a graduation value of 0.02mm for testing.
5.2 The appearance quality of graphite shall be inspected by the visual inspection method. 5.3 The ash content, total porosity and bulk density shall be inspected according to JB/T8133, and the degree of graphitization shall be inspected according to JB/T4220. 6 Inspection regulations
6.1 According to 4.1 to 4.4 of this standard, the graphite shall be inspected batch by batch before delivery. Each graphitization furnace is a batch. 6.2 The sampling method for the inspection of graphite before delivery shall be GB/T2828.! . 6.3 When testing the ash content, total porosity and bulk density of T622, T623, T664, T665 and T666 rough graphite in accordance with 4.3 of this standard, the normal inspection two-drink sampling plan, special inspection level S-2 and acceptance quality limit AQL=6.5 shall be adopted. 6.4 When testing the ash content and total porosity of T12, T621 and T641, T642.1643 and T692 graphite, the normal inspection two-drink sampling plan, special inspection level S-2 and acceptance quality limit AQI.6.5 shall be adopted, the unit product is set as 100B, and the batch size is equal to the mass of the batch (g)/100 (g).
6.5 When inspecting the graphitization degree of each type of graphite, samples shall be taken from each batch (furnace) of unit products as specified in 6.3 and 6.4 of this standard. The sample size is 3 (two furnace heads, 1 sample unit is taken from each furnace). If one of the samples fails, the batch of products shall be judged to be unqualified. However, the batch of graphite is allowed to be reprocessed and submitted for inspection again. 6.6 When inspecting according to 4.1 and 4.2 of this standard, a normal inspection single sampling plan is adopted, the general inspection level is 1, and the acceptance quality limit is AQI.=6.5.
6.7 When inspecting according to 4 and 4 of this standard, a normal inspection single sampling plan is adopted, the special inspection level is S-4, and the acceptance quality limit is AQL=6.5.
7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 The qualified graphite shall be issued a certificate by the manufacturing quality inspection department. The certificate of conformity shall indicate the manufacturer's name, product name, trademark, product model, manufacturing date or production batch number, standard code, full-time inspector code and quality inspection department's special seal. 7.1.2 The small package of graphite shall indicate the product model, production batch number, specification size and net weight; the large package shall indicate the user's name, production unit, destination and departure station name, net weight, and indicate moisture-proof, vibration-proof and stacking layer limit signs. 7.2 Packaging
7.2.1 The qualified graphite shall be packed in plastic bags and sealed, and then packed in cardboard or plastic basins. The amount of each box shall not exceed 1kg. 7.2.2 The Shibi Lianshang product certificate packed in cardboard or plastic basin shall be packed in the packaging box, and the empty space in the box shall be filled with paper scraps. Each box shall not exceed 40kg.
7.3 Transportation
During transportation, it shall be packed in a sealed or covered car box to prevent Zhengli Lin. Note: The magnetic fragmentation rate of the film during transportation should be less than 2,7.4 The stone wall should be stored in a dry warehouse without corrosive gas to avoid pollution and stimulation. GB/T14898-2004
New version
Appendix A
(Informative Appendix)
Comparison table of new and old models of graphite for artificial diamond
Old model
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