Alumina crucible , Al2O3
Alumina crucible (Al2O3 crucible) is a ceramic crucible widely used in various research and industrial applications. Alumina has excellent heat resistance, wear resistance and corrosion resistance. It is a representative of crucible materials with high performance, low cost and extremely cost-effectiveness.
- Performance of alumina crucible:
Our typical alumina crucible products can work at extreme high temperatures of up to 1750°C. Their excellent thermal shock resistance resists thermal shock in high-temperature applications. They can withstand a temperature change rate of up to 150°C/Hr without cracking (large The crucible needs to be preheated to prevent cracking due to rapid temperature changes)
Alumina crucibles have good resistance to chemical substances and can resist most acid, alkali, salt solutions or hydrogen and other strongly reducing chemical attacks.
In order to ensure that you can maximize the performance and extend the service life of our products when you purchase and use them, we provide you with the following professional suggestions. Please be careful to avoid prolonged contact or high temperature treatment of the following solutions: hydrofluoric acid solution (HF ), high temperature phosphoric acid solution (H3PO4), high temperature sodium hydroxide solution (NaOH), boiling point potassium hydroxide solution (KOH).
- Alumina crucible process:
We use high-quality alumina as raw material and are equipped with multiple ball mills for powder grinding. The size of the powder particles is controlled at the sub-micron level to ensure that the alumina ceramics can achieve the best performance.
Our products add a very small amount of magnesium oxide (MgO ≤ 0.05%) during the sintering process, which can effectively control the growth of grains (grain size is 2-4 microns). At the same time, we control the pores generated during the sintering process to less than 0.4%, which can well maintain the performance of the product.
- we provide:
Alumina ceramic crucibles come in various sizes and shapes. We can provide you with cylindrical crucibles, boat-shaped crucibles (alumina boat), tray-shaped crucibles (alumina trays), customized special-shaped crucibles, etc , and we can also provide you with Crucible lid.
Ceramic crucibles of different purity have differences in performance. We can provide ceramic crucibles of various purity. The most common ones are 99% alumina crucible, 99.7% alumina crucible, 99.8% alumina crucible, etc. Their performance parameters are compared as follows:
|
Performance Parameters |
99% Alumina Crucible |
99.7% Alumina Crucible |
99.8% Alumina Crucible |
|
purity |
≥ 99% |
≥ 99.7% |
≥ 99.8% |
|
Density |
3.75 g/cm³ |
3.85 g/cm³ |
3.9 g/cm³ |
|
Flexural Strength |
250 MPa |
300 MPa |
350 MPa |
|
Compressive Strength |
2000 MPa |
2500 MPa |
3000 MPa |
|
Elastic Modulus |
340 GPa |
370 GPa |
380 GPa |
|
Vickers Hardness |
1500 HV |
1700 HV |
1800 HV |
|
Thermal Conductivity |
25 W/m·K |
28 W/m·K |
30 W/m·K |
|
Thermal Expansion Coefficient |
8.2 x 10⁻⁶/K |
8.4 x 10⁻⁶/K |
8.5 x 10⁻⁶/K |
|
Maximum Service Temperature |
1600°C |
1700°C |
1800°C |
|
Volume Resistivity (25°C) |
10¹⁴ Ω·cm |
10¹⁴ Ω·cm |
10¹⁴ Ω·cm |
|
Dielectric Constant (1 MHz) |
9.8 |
9.6 |
9.4 |
|
Dielectric Loss (1 MHz) |
0.0002 |
0.00015 |
0.0001 |
*The above table only shows the typical performance of alumina crucibles based on our production experience. The characteristics of a custom alumina crucible will vary depending on the purity and process chosen.
Application areas
Alumina ceramic crucibles have a wide range of applications. The following are some common application areas:
- Chemical material analysis and laboratories serve as carriers for high-temperature processing of chemical reagents and samples;
- Material application fields assist in high-temperature sintering and heat treatment of various materials, and molten metal experiments;
- In the metallurgical industry, it is used for high-temperature smelting and refining metals, and the preparation of alloys and other composite materials;
- Used in the semiconductor industry for high-temperature oxidation treatment of wafers;
- The glass manufacturing industry is used for the high temperature melting preparation of glass.
Our advantage
We have a professional advanced ceramic production factory with 15 years of professional experience and numerous technical research results in the production of advanced ceramics.
We only produce high-quality products and produce alumina crucibles in a million-level dust-free workshop. We select the best raw materials and equipment to ensure the performance of subsequent ceramics.
In the molding process, we use a variety of advanced equipment, such as injection molding machines, isostatic pressing machines (CIP), hot press molding machines, etc. These equipments and the operation of our professional staff ensure the quality of alumina ceramic products.
Sintering is a very critical step in the ceramic manufacturing process. We use a rapid sintering furnace (RAPID) to ensure quality and greatly shorten the ceramic sintering cycle. It also has microwave sintering furnace, hot isostatic pressing furnace (HIP) and other equipment for sintering different alumina ceramics. Our professionals strictly and accurately control the ceramic sintering time and temperature to further improve the performance of alumina ceramics.
We conduct strict product inspections on our products. For high-precision ceramic parts, we achieve the smallest and most reasonable tolerances;
A group of R&D teams with rich professional knowledge are at your service at any time. We enjoy a good reputation at home and abroad and are appreciated by many partners.
packaging
We carefully package each product to prevent the goods from being damaged during transportation. We ensure that the alumina crucibles delivered to you are of high quality and complete.
