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.

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1. Superabrasives
2. Quartz and fused silica manufacturing
3. Fibre optics
4. Semiconductor production
5.Casting of ferrous/non-ferrous metals



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.

Established in 2017, located in Fengxin Industrial Area, Yichun City, Jiangxi Province, China, Jiangxi Ningheda New Material Co., Ltd. is the subsidiary company of Jiangxi Ningxin New Material Co., Ltd.

Jiangxi Ningxin New Material Co., Ltd. is an enterprise which specializes in R&D, production and sale of special graphite. The total investment is RMB 180 million. It covers an area of more than 70000 square meters and produces 10000 tons of special graphite annually, which makes Ningxin to be the leading enterprise in the domestic industry.

On November 8^th, 2016, Ningxin was listed of Chinese new third board. The stock abbreviation is Ningxin New Material, and stock code is 839719.
Jiangxi Ningheda New Material Co., Ltd. is mainly engaged in graphite product processing, graphite product matching service, providing graphite materials, graphite electrode and graphite products for the lithium industry, rare earth industry, machinery industry, aerospace, semiconductor and solar photovoltaic industry, together with the corresponding products technical service and technical application of update program.


With excellent production technology, good customer service, high market share, and relying on the advantage of new material, capital and management of parent company (Jiangxi Ningxin New Material Co., Ltd.), Jiangxi Ningheda New Material Co., Ltd. develops quickly. We devote to the extension of the special graphite industry chain, and make contributions for building the future whole graphite industry strategy.

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.



1. Stable quality, reasonable price, efficient communication, timely delivery.
2. Many experts with more than 20 years of experience in graphite industry, we not only provide graphite products, but also provide application solutions for the corresponding industry.
3. The company's strength and scale are in a leading position in China, with emphasis on reputation and worry-free after-sales.
4. The products sell well in many countries worldwide, with rich experience in import and export, and complete various certificates to ensure that the goods reach the customer smoothly.
5. With professional designers, OEM and ODM are available.
6. Fast and convenient delivery method, which can guarantee the timeliness.

High oxidation resistance fine Grain Graphite Rod