Boron nitride is a covalent compound composed of the elements boron and nitrogen. According to different crystal structures, it can be divided into various forms such as hexagonal boron nitride (h-BN), cubic boron nitride (c-BN) and amorphous boron nitride. Among them, hexagonal boron nitride (h-BN) is widely used in the preparation of high-performance ceramic crucibles due to its layered structure, excellent lubricity and insulating properties.

BN is also known as “white graphite” because its crystal structure resembles graphite. It has both high thermal conductivity and high insulating properties, and is one of the very few materials that can be both thermally stable and electrically insulating at high temperatures. This makes it an ideal crucible material for the melting of high-purity metals and compounds.

These properties enable boron nitride crucibles to maintain high stability at high temperatures, in high vacuum, and in corrosive atmospheres, and are particularly suitable for applications where material purity is critical, such as semiconductor crystal growth and metallization evaporation.

Great Ceramic selects high purity boron nitride powder (purity ≥99.9%) and adds a small amount of binder phase (such as alumina or silicon nitride) according to the different application requirements, in order to enhance the sintering density and mechanical properties.

Cold Isostatic Pressing (CIP) or Hot Press Sintering (HP).

• CIP molding Suitable for large crucible sizes, guaranteeing dimensional accuracy and structural homogeneity;

• The hot press sintering process results in crucible structures with higher densities and better thermal conductivity.

Boron nitride ceramics are usually sintered at temperatures between 1800 and 2000°C. The sintering temperature of boron nitride ceramics is usually between 1800 and 2000°C.
Great Ceramic performs controlled sintering in a vacuum and inert gas environment to minimize oxidation and impurity introduction.
The final result is CNC precision machining to achieve high dimensional accuracy and smooth surfaces to meet customer requirements for sealing and assembly accuracy.

It can be seen that boron nitride ceramic crucible has the most outstanding comprehensive performance in electric insulation, high purity melting and anti-pollution, which is the preferred material for the current high-tech industry.

Boron nitride ceramic crucible is not only a high-temperature container, but also a key functional component in high-end manufacturing system. In the future, its technological development will present the following directions:

• Chemical vapor synthesis (CVD) with plasma spheronization was used to prepare ultrafine BN powders;

• The grain size is controlled at 0.5-1 μm to improve the crucible density and mechanical strength;

• Reduces the content of impurity ions (Na, Fe, Ca) to meet semiconductor-grade purity requirements.

• Introduction of 3D printing + Hot Isostatic Pressing (HIP) technology for one-piece molding of complex shaped crucibles;

• CNC precision machining + digital inspection ensures dimensional accuracy of ±0.02 mm;

• Apply AI to control the sintering curve and realize automatic optimization of process parameters.

• Development of renewable BN crucible re-sintering technology;

• Recycling of used crucible powder reduces manufacturing energy consumption and carbon emissions;

• Promote a green ceramic manufacturing system that is “pollution-free, high-purity and sustainable”.

• BN crucibles will become a standardized component in the epitaxial growth of compound semiconductors (SiC, GaN);

• BN-Si₃N₄ composite crucibles will be the core structural material in hydrogen and aerospace high-temperature reaction systems;

• In the future, BN crucibles are expected to be functionally integrated (thermal conductivity + insulation + shielding).

As a professional manufacturer of advanced ceramics in China, Shenzhen Zhihao Ceramics Co., Ltd. focuses on the research, development and customization of high-performance ceramic materials, with the whole process technology system from raw material preparation, mold forming, sintering to precision processing.

Our strengths include:

1. High purity raw material control: imported BN powder, purity ≥ 99.9%, impurity ion content is strictly controlled at ppm level.

2. Multi-process molding system: CIP, HP or HIP molding process can be provided according to customers' needs.

3. Precision machining capability: tolerance can be controlled at ±0.02mm, surface finish up to Ra0.2.

4. Customized design service: support the customization of crucibles of different sizes, structures and applications (round, square, conical, multi-chamber type, etc.).

5. Strict quality testing: Each batch of products is tested for density, thermal conductivity, microstructure and purity to ensure batch consistency.

BN crucibles are chosen not only to improve the performance of the equipment, but also to minimize production risks and increase material purity.
For high-end applications (e.g. semiconductor manufacturing, rare-earth metal purification, PVD coating systems, etc.), every reaction of the material brings cost loss and quality instability.

The value of boron nitride ceramic crucibles is reflected in:

• Guaranteed high purity production environment, no metal contamination

• Extends crucible life and reduces replacement frequency

• Improve process stability and product yield

• Combination of light weight, high strength and machinability

To Good Ceramics' boron nitride crucibles have been proven by customers in many industries:

• Semiconductor industry: cooperated with many crystal growth equipment factories to provide BN crucible components for GaN and SiC crystals;

• Optical coating industry: Used in evaporation source containers to stabilize the output of metal films;

• Scientific research institutions and universities: long-term supply to materials laboratories for high-temperature reaction and composite material preparation experiments.

Customer feedback indicates that BN crucibles are significantly better than traditional alumina products in terms of durability and purity, with service life extended by 30% to 50%.

Boron nitride ceramic crucible is not only a high-temperature container, but also an important basic material to support high-end manufacturing system.
Its unique properties in high-temperature insulating, reaction-resistant, and high-purity environments make it an irreplaceable key component for high-tech manufacturing.

ZhiHao Ceramics is committed to providing reliable advanced ceramic solutions for customers around the world, from research and development to mass production, the whole process of “precision manufacturing, quality-oriented” as the core concept.
Choose boron nitride ceramic crucibles for a future of stability, high purity and technological leadership.