Silicon nitride ceramics chemically inert to metals

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User asked: I need a material that can work stably in extremely corrosive environments. It must be resistant to high temperatures, wear, and not react with molten metal or chemical media to avoid contaminating the process or reducing product quality. Is there a material that can simultaneously solve these problems?
The answer is: silicon nitride ceramics.
This advanced ceramic material not only can withstand high temperatures (up to 1400 ° C or above), but also has excellent chemical inertness – especially when facing molten metals such as aluminum, copper, zinc, etc., it hardly reacts, avoiding contamination of the molten metal. At the same time, its high hardness, low friction coefficient, and excellent thermal shock resistance solve the pain points of traditional metal materials being prone to corrosion, short lifespan, and high maintenance costs. Silicon nitride ceramics can provide reliable and durable solutions for semiconductor manufacturing, chemical pump valves, and aerospace components.

Multi domain high-performance solutions
Silicon nitride ceramics play a key role in multiple industrial fields due to their unique properties:

1. Metallurgy and Casting Industry
   Used for molten metal conveying components (such as pouring nozzles, thermocouple protection tubes) to avoid metal contamination and extend component life.
2. Semiconductor and Electronics Industry
   As a wafer carrier and etching component, it maintains stability in high-temperature corrosive gas environments to ensure the purity of chip manufacturing.
3. Chemical and petroleum industries
   Used for sealing rings, bearings, pump valve components, resistant to corrosive media such as acid and alkali, reducing equipment downtime.
4. Aerospace and Energy
   Applied to turbine blades and combustion chamber components, maintaining structural integrity in high-temperature and high-pressure environments.

Why does silicon nitride ceramic stand out?
-Excellent chemical inertness
Has extremely high resistance to most molten metals (such as aluminum, copper, lead) and acid-base media, avoiding pollution and degradation caused by chemical reactions.
-High strength and high temperature resistance
It maintains high mechanical strength even at high temperatures, with a working temperature of over 1200 ° C and a short-term tolerance of 1400 ° C.
-Excellent thermal shock resistance
Low coefficient of thermal expansion, able to withstand rapid temperature changes without cracking, suitable for processes with frequent cold and hot cycles.
-High hardness and wear resistance
The Vickers hardness exceeds 1400, and the wear rate is much lower than that of alloy materials, extending the service life of components.
-Insulation and biocompatibility
Having good electrical insulation properties, it can be used in electronic devices; Non toxic and also suitable for medical implants.

Meet diverse specification requirements
We provide full-size customization services to ensure that products accurately match customer applications:
-Flexible size range
It can produce components ranging from millimeter sized small parts to hundreds of millimeters sized large structural parts, supporting complex geometric shape designs.
-Precision machining capability
By using CNC grinding, laser cutting and other technologies, the tolerance can be controlled within ± 0.01mm, and the surface roughness can reach Ra0.1 μ m.
-Multiple molding processes
Provide different process options such as reaction sintering, hot pressing sintering, and pressure sintering to balance performance and cost requirements.
-Coating and post-treatment
Anti oxidation coatings, polishing, and other treatments can be applied as needed to further enhance performance.

Problem solving: Directly addressing industry pain points

1. Extend the lifespan of components
   In aluminum liquid circulation pumps, the lifespan of silicon nitride impellers is increased by more than 5 times compared to traditional materials, reducing the frequency of replacement.
2. Improve product purity
   Used as a heat treatment carrier for solar silicon wafers to avoid impurity precipitation at high temperatures and improve battery conversion efficiency.
3. Reduce maintenance costs
   Chemical centrifugal pumps use silicon nitride sealing rings, reducing annual maintenance costs by 40% and downtime by 60%.
4. Adapt to extreme environments
   Aerospace testing equipment operates stably in high-temperature gas without the need for additional cooling systems.

Customer Application Case (Anonymous)

1. An international aluminum industry group
   We use our customized silicon nitride riser for low-pressure casting of aluminum alloys, which has been continuously used for 18 months without corrosion. The metal impurity content has been reduced by 90%, and the annual maintenance cost has been saved by over 2 million yuan.
2. A leading photovoltaic enterprise
   By using our silicon nitride ceramic components in the thermal field of the polycrystalline silicon ingot furnace, the temperature resistance has been improved to 1500 ° C, the product purity has been enhanced, and the battery efficiency has exceeded 23.5%.
3. European chemical equipment manufacturers
   We have fully replaced our silicon nitride mechanical seal in its highly corrosive medium delivery pump, which has been continuously operated for over 8000 hours in a strong acid environment with pH=1, resulting in a 70% decrease in customer equipment failure rate.

Silicon nitride ceramics are becoming a key material for high-end industrial upgrading due to their chemical inertness towards metals and comprehensive excellent performance. Whether seeking to improve existing processes or developing new generation equipment, we can provide you with material solutions and customized support.
Contact us immediately for sample testing and customized solutions – let us use reliable silicon nitride ceramics to help your project move forward steadily in harsh environments!

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.