Alumina Crucible

Alumina crucible is a high-performance high-temperature resistant ceramic component made from high-purity aluminum oxide raw materials of 92%, 95%, and 99% through precision molding and high-temperature sintering. It has low thermal conductivity, low thermal expansion coefficient, no deformation at high temperatures, excellent insulation and corrosion resistance.

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Description

Technical Parameters

Products Description

Alumina crucible is an indispensable high-temperature resistant ceramic product in industrial production and scientific research experiments, and its performance directly depends on the aluminum oxide content of the raw materials. Our alumina crucibles are divided into three grades: 92%, 95%, and 99%. Different purity grades of alumina are matched with different high-temperature working conditions, which can fully meet the requirements of low, medium, and high temperature scenarios from 1600 ℃ to 1700 ℃.
Unlike ordinary refractory crucibles, our alumina crucible adopts innovative precision molding technology instead of traditional production methods, effectively ensuring the straightness, uniform wall thickness, and high dimensional accuracy of the crucible body. The internal structure of the sintering crucible is dense, which can resist thermal shock to the maximum extent, avoid cracking and deformation during rapid heating and cooling cycles, and maintain stable performance during long-term high-temperature use.

Alumina Cylinder Crucible Size

直径x高度 dia.x height (mm)	直径x高度 dia.x height (mm)	直径x高度 dia.x height (mm)	直径x高度 dia.x height (mm)	直径x高度 dia.x height (mm)
9x40	25x60	45x35	60x60	80x200
11×20	28x17	45x60	60×80	88x150
12x12	28x60	45x110	60x100	95x60
12×40	30x28	48x120	60x120	100x35
14x45	30x100	50x50	60x170	100x100
16×28	35x30	50x60	66x150	105×200
16x50	35x60	50×80	70x70	115x110
16x55	35x100	50x100	70x100	115x155
16x70	40x50	50x150	70x120	125x150
20×20	40x70	60x40	80x80	150x180

advantages

1. High temperature resistance
The alumina crucible is made of high-purity alumina, with a maximum operating temperature of 1700 ℃ (99% content), and can maintain structural stability under long-term high-temperature heating without deformation or cracking. It is suitable for various high-temperature working conditions, such as rapid heating and repeated heating cycles.

2. Wide adaptability
We offer alumina in three material grades: 92%, 95%, and 99%. The 92% grade is used for conventional medium and low temperature scenarios, the 95% grade is used for industrial high-temperature processing with high corrosion resistance requirements, and the 99% grade is used for high-precision scientific research and ultra-high temperature smelting to meet the diverse needs of our customers.

3. Excellent structural performance
The molding technology we use ensures that the alumina crucible has a uniform wall thickness. The edge and bottom are integrally formed without welding seams, effectively improving the product's pressure resistance and impact resistance, avoiding damage caused by uneven force during use.

4. Low thermal conductivity and excellent insulation
Alumina crucible has low thermal conductivity, high volume resistivity, and good insulation performance, which can reduce heat loss during high-temperature processing and save energy consumption; At the same time, it has excellent electrical insulation performance, making it safe and reliable to use in electric heating equipment.

5. Strong corrosion resistance and wear resistance
The dense alumina ceramic structure is resistant to corrosion from most molten metals, glass melts, and chemical media, without chemical reactions or material contamination, and can maintain the purity of the molten material. Smooth and wear-resistant surface, with a long service life.

6. Complete size and customizable service
We have a full range of standard sizes, with diameters and heights ranging from 9mm x 40mm to 150mm x 180mm, covering most laboratory and industrial equipment models. We also support customized production of special sizes, shapes, and specifications based on customer drawings and requirements.

7. Supporting accessories, one-stop supply
In addition to alumina crucibles, we also provide matching alumina trays and boats with the same material and performance, perfectly matched in size and can be used together, solving the problem of customers purchasing accessories separately.

product-1225-218

Application

1. Laboratory
Used for high-temperature melting, calcination, and sample analysis of metal and non-metal materials in chemistry, materials, and physics laboratories, with accurate size and small volume, suitable for small sample experimental operations.
2. Metallurgy and Metal Processing
Suitable for smelting and casting non-ferrous metals such as gold, silver, copper, aluminum, as well as high-temperature heat treatment of metal materials, resistant to the erosion of molten metals, and ensuring the purity of metal products.
3. Chemical Industry and Glass Manufacturing
Used for high-temperature reactions of chemical raw materials, melting of glass powder, and preparation of glass products, it is resistant to corrosion from most chemical media and glass melts, and has stable long-term performance.

Note

Aluminum oxide crucibles are fragile due to their poor toughness, so operators should handle them gently before use to avoid impact and carefully inspect them. Do not use cracked products.

Aluminum oxide crucibles should be thoroughly dried before use. If drying is carried out in an electric furnace, it must be ensured that the process is slow and there is no thermal shock. Aluminum oxide crucibles shall not be used in the furnace without heating and cooling rate adjustment, and the heating rate shall not exceed 50T/10 nuts. The maximum heating temperature of alumina crucible shall not exceed 1700 ℃.