Graphite boxes, also known as graphite square crucibles and graphite saggers, are precision-machined box-shaped graphite products made from high-purity graphite. They are mainly used in the sintering process of positive and negative electrode materials in the lithium battery industry, serving as specialized carriers for powder materials. Used with equipment such as kilns and graphitization furnaces, they are important auxiliary components in the lithium battery material production process.

In the lithium battery production process, the core function of graphite boxes is to carry positive and negative electrode powder materials, which are then placed in furnaces for high-temperature heating. Specifically, in the graphitization and purification process of negative electrode materials, they can be used as exclusive containers for negative electrode powder, placed in graphitization furnaces to complete the heating process, helping negative electrode materials achieve the desired degree of graphitization and purity.

At the same time, this product is also compatible with the sintering needs of positive electrode materials such as lithium iron phosphate, offering wide adaptability. In recent years, with the steady development of the lithium battery industry, this product has been widely adopted by numerous domestic high-temperature furnace enterprises, lithium iron phosphate manufacturers and lithium battery factories, becoming a mainstream sintering carrier in the industry.

The product is made of high-purity graphite (purity ≥99.9%), featuring strong material stability and excellent chemical inertness. It is not easy to react with lithium battery materials in a high-temperature sintering environment and will not introduce impurities, which can effectively ensure the purity and batch consistency of battery materials, while also extending its service life.

In actual use, when combined with inert gas protection, it can further reduce the oxidation loss of graphite boxes, extend their cycle service life, and help enterprises reduce production consumable costs.

According to different types and specifications of kilns, we can provide customized matching bottom plates and covers to ensure perfect compatibility between the product and the kiln, improving loading efficiency and sintering effect.

In terms of process selection, one-piece molding or machining processes can be chosen based on actual application scenarios: the machining process offers high precision and dense structure, suitable for scenarios with high requirements for dimensional accuracy and service life; the one-piece molding process is cost-effective, suitable for conventional needs with relatively simple dimensions and large usage. Both processes have their own advantages and can meet the personalized needs of different customers.

As a professional source factory of graphite products, we have focused on graphite processing for many years, with a complete production and testing system and after-sales guarantee. We strictly control product quality in accordance with industry standards to ensure the stability and reliability of each batch of products. With high-quality products, our graphite boxes, graphite saggers, graphite crucibles and other products have been exported to more than 30 countries and regions around the world, winning recognition from customers at home and abroad.

When purchasing graphite boxes, graphite saggers and other products, it is recommended to pay attention to the following key points to better match production needs:

1. Material Purity: Prioritize high-purity graphite with ≥99.9% purity to ensure material stability and service life;

2. Process Selection: Choose one-piece molding or machining process reasonably according to your own application scenarios;

3. Dimensional Accuracy: Customize strictly according to kiln specifications to ensure compatibility and use efficiency;

4. Quality Assurance: Select a source factory with a complete testing system and after-sales guarantee, balancing product quality and follow-up services;

5. Customization Capability: If there are special process requirements, choose a manufacturer that supports custom production based on drawings to meet personalized production needs.

We support custom production based on drawings. We can accurately customize various graphite boxes, graphite saggers and graphite crucibles according to customers’ specific process requirements and kiln specifications, providing professional technical support and complete after-sales service throughout the process. We welcome customers from all sectors to consult and negotiate, cooperate hand in hand to promote common development.