Basic Info.
Carbon Content
High-Carbon
Forming Way
Molded Graphite
Product Description
What is graphite Rod?There are two types of graphite rod, blank material (unmachined graphite rod) and finished product (machined graphite rod).
Graphite rods are often used as electric heating elements in high-temperature vacuum furnaces. The maximum operating temperature can reach 3000°C. It is easy to oxidize at high temperatures, it can only be used in neutral or reducing atmospheres and vacuum furnace. Its thermal expansion coefficient is small, thermal conductivity is large, resistivity is (8~13)×10-6 Ω·m, easier to process than SiC, MoSi2 rod, high temperature resistance, extreme cold and extreme heat resistance, good price Cheaper.Applications of graphite rod:
1. Superabrasives
2. Quartz and fused silica manufacturing
3. Fibre optics
4. Semiconductor production
5.Casting of ferrous/non-ferrous metals
How to choose graphite rod?
One: Choose a graphite rod with good uniformity
When it needs to appear in a vacuum furnace as an electric heating element, it is necessary to select the graphite rod for the uniform red heat performance of the heating part, because the uniform red heat performance will affect the temperature distribution in the furnace and the service life. If in the process of use, due to The red heat uniformity of the graphite rod becomes worse, which will cause its fracture.
Two: pay attention to the surface temperature
Because of the nature of the graphite rod itself, the higher the temperature, the shorter the life of the graphite rod during use. Therefore, when the surface temperature of the graphite rod exceeds a certain temperature, the oxidation rate of the graphite rod will increase and its life will be shortened. Therefore, we should try not to make the surface temperature of the graphite rod too high during use.
Three: There should be enough voltage adjustment margin
When the graphite rod is heated in the air, it will form a dense silicon oxide film on its surface, which becomes what we often call an anti-oxidation protective film, so when it is used intermittently, the temperature stability in the vacuum furnace must be ensured, so When a new graphite rod is used, the resistance value of the graphite rod will increase at a lower voltage.
Four: voltage after use
When a variety of graphite rods require a higher voltage in the later stage of use than the new rod, we should pay attention to the voltage in the later stage of use, and adjust it according to the way of voltage regulation or the way of wiring. Generally, the upper limit of the voltage in the later stage All have certain calculated values.
The above are the precautions for the use of graphite rods in the vacuum furnace. More matters will not be elaborated here. When the graphite rod needs to be used continuously, the voltage can be increased slowly to maintain its life.
| Grade | NX601 | NX602 | NX603 | NX604 | NX605 |
| Grain Size (≤μm) | 25 | 25 | 25 | 25 | 25 |
| Bulk Density (≥g/cm3) | 1.55 | 1.72 | 1.80 | 1.85 | 1.90 |
Compressive Strength
(≥MPa) | 35 | 45 | 60 | 65 | 70 |
Flexural Strength
(≥MPa) | 15 | 20 | 30 | 33 | 35 |
| Porosity (≤%) | 23 | 20 | 17 | 14 | 11 |
Specific Resistance
(≤μΩm) | 12 | 12 | 12 | 12 | 12 |
| Ash Content (≤%) | 0.08 | 0.07 | 0.06 | 0.05 | 0.03 |
| Shore Hardness | 35 | 45 | 50 | 55 | 60 |
Advantages of Zhengte graphite raw material
1. The processing materials are ultrafine granule structure, high purity and graphite with high graphitization degree.
2. High hardness, good anti-oxidation performance and high machining accuracy
3. Good conductivity, high resistivity, sufficient mechanical strength
4. Small porosity and dense structure.
5. Excellent thermal shock resistance, conductive and thermal conductivity.
6. High temperature resistance, corrosion resistance, acid and alkali resistance, good wear resistance.
7. Surface can be treated with anti-oxidation.
Instructions for use of graphite boat / graphite box
Our company produces and processes graphite boxes according to customer drawings, and uses wooden box packaging to ensure the safety of the goods. The timeliness and transportation safety of the cooperative logistics company are guaranteed, so that customers have no worries about after-sales.
Our company produces all kinds of fine-grained high-purity artificial graphite blocks suitable for processing graphite boxes throughout the year, and specializes in processing various specifications of graphite boxes and graphite trays. Using fine-grained high-density graphite as the raw material, the processed graphite box has the characteristics of high temperature resistance, oxidation resistance, high body density, etc., which can be used in a variety of harsh high temperature environments. It is the first product for customers in the high-end graphite industry at home and abroad.
Address:
Qingdao Road, Shuiji Sub-District Office, Laixi City, Qingdao, Shandong, China
Business Type:
Manufacturer/Factory
Business Range:
Chemicals, Metallurgy, Mineral & Energy
Company Introduction:
Our company is a professional enterprise engaged in the production, processing and sales of graphite products such as graphite mold, graphite sleeve and flake graphite. Registered capital of 500, 000 yuan, the company has 30 employees, covers an area of 10, 000 square meters, with CNC grinding machine, CNC lathe, graphite engraving and milling machine, CNC cutting machine and various types of specifications of lathes and other processing equipment, complete production equipment, strong technical force, good reputation.
Business scope: Graphite and carbon products manufacturing; Sales of graphite and carbon products; Graphite powder processing (excluding mining); Mold manufacturing; Mold sales; Technical service, technology development, technology consultation, technology exchange, technology transfer, technology dissemination; Import and export of goods.
With sincerity as the root, with the letter as the foundation, we will sincerely cooperate with domestic and international customers with sincere confidence, exquisite technology, stable quality and first-class service, and create brilliant future together!
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