Porous alumina ceramic connection block

Porous alumina ceramic connecting block is a precision ceramic component made of high-purity alumina (Al ₂ O ∝) through a special sintering process. It not only retains the inherent high hardness and high temperature resistance characteristics of alumina in its structure, but also plays a role in the connection and fixation of “rigidity and flexibility” in semiconductor equipment, chemical reaction devices, and high-temperature vacuum environments due to its unique through-hole design and precise dimensional tolerances. It is both a structural component and a functional component, capable of carrying mechanical loads while achieving airflow guidance or electrical isolation.

Frequently Asked Questions (FAQ)
Q1: In high-temperature environments, ordinary metal connectors are prone to thermal expansion and deformation, leading to leakage. Can this product solve this problem?
A: Absolutely possible. The thermal expansion coefficient of porous alumina ceramic connection blocks is extremely low (about 1/3 to 1/4 of that of metals), and they can still maintain dimensional stability under severe temperature fluctuations, ensuring connection accuracy and sealing.
Q2: Can this type of connection block meet complex requirements when the equipment space is small and requires both fixed wiring and ventilation?
A: This is precisely its core advantage. We support the customized design of “one object for multiple uses”, which can utilize its porous structure as a uniform gas flow channel, and at the same time use the insulation properties of ceramics themselves as electrical isolation points, saving space and simplifying the mechanism.
Q3: Under strong acid and alkali or plasma impact, the lifespan of ordinary components is very short. Is this product durable?
A: Very durable. High purity alumina material has excellent chemical inertness, corrosion resistance, and resistance to plasma sputtering, which can significantly extend equipment maintenance cycles and reduce long-term operating costs.

Core advantages of the product
Our porous alumina ceramic connection block is not only a “connector”, but also a comprehensive solution to solve the connection problem under extreme working conditions.
-Material performance: High purity alumina powder with a content of ≥ 99% is used to ensure that the product has a bending strength of over 350 MPa and excellent dielectric strength. The product can maintain stable shape at high temperatures of 1650 ℃, without softening or oxidation.
-Structural design: Unlike traditional dense ceramics, we give the product a “designable” porosity by precisely controlling the sintering process. This not only reduces weight, but more importantly, it can achieve special functions such as uniform air resistance and porous shock absorption.
-High precision and sealing: CNC and precision grinding machining centers are introduced to ensure that the flatness of the installation surface and the positional tolerance of the connecting holes are controlled at the micrometer level. For connection blocks used in vacuum environments, we can also conduct strict helium mass spectrometry leak detection to ensure compliance with ultra-high vacuum requirements.

Product Application Cases
In order to better understand how porous alumina ceramic connection blocks can solve practical problems, the following are two typical application scenarios:
Case 1: Gas Spray Fixture in Semiconductor Etching Equipment
Requirement: A semiconductor equipment manufacturer needs to fix a ceramic spray plate in a closed chamber when developing a new generation plasma etching machine. The fixture not only needs to provide stable mechanical support in high temperature and high voltage environments, but also must evenly distribute the reaction gas to the wafer surface through its internal structure. Metal parts can cause pollution and cannot evenly distribute air.
Solution: We have customized a “porous alumina ceramic connection block” for it. The connection block is designed in a circular shape with precision mounting screw holes in the middle for fixation, and uniform micro hole channels are constructed inside the block through 3D printing technology. This serves as both a structural connector and a gas diffuser.
Final effect: After installing the connection block, the uniformity of gas distribution inside the equipment increased by 25%, and due to the plasma erosion resistance of alumina, the replacement cycle of the component was extended from the original 3 months to 12 months, greatly improving the operating time of the machine.
Case 2: Catalyst Support Column in Chemical High Temperature Reactor
Requirement: A support structure is needed to support the catalyst bed in a high-temperature (~800 ℃), high-pressure hydrogenation reactor in the petrochemical industry. This structure needs to withstand the corrosion of sulfur-containing hydrogen gas and cannot block the flow of reaction products. Traditional metal support towers collapse due to sulfur corrosion at high temperatures.
Solution: Using high-purity porous alumina material, custom processed into a “tower column shaped connecting block” with multiple through grooves and a central threaded hole. This design allows the reaction products to pass smoothly, while utilizing the high-strength support of ceramics to support the catalyst weighing several tons above.
Final effect: After two years of use, it was found that the surface of the ceramic connecting block only showed slight discoloration and no signs of corrosion. The strength did not weaken, completely solving the problem of annual shutdown and replacement of metal parts.

Customized services and specifications
We are well aware that standard parts cannot meet the unique needs of all cutting-edge equipment. We provide in-depth customized image services:
-Customization of appearance: Whether it is a square, circular, triangular or complex shaped flange structure, we can achieve it through dry pressing or injection molding processes.
-Channel design: The aperture size and hole spacing accuracy can be customized according to customer needs. For connection blocks that require gas or liquid flow, we can optimize the channel design to reduce resistance.
-Size range: From small precision connectors of a few millimeters to large structural components of several hundred millimeters, they can be processed.
-Technical specifications: Purity can be selected (99% to 99.99%), and porosity can be adjusted to meet different needs from structural support to microfluidic control.

If you are looking for a connectivity solution that can work stably in extreme environments and integrate multiple functions, we sincerely invite you to communicate with us. Please send us your drawings or technical requirements, and our engineers will provide you with professional material selection and quotation consultation within 24 hours.

Brudeze Ceramics supplies and sells a wide range of high-quality quartz glass, including alumina ceramics, zirconia ceramics, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics, boron carbide ceramics, bioceramics, machinable ceramics, etc. We can meet the customization requirements of various ceramic products.