Metal carrier VS ceramic carrier, do you know how to choose?

As the global car ownership continues to surge, so how to efficiently deal with car exhaust has become an important issue of environmental protection, as we all know, as the most important external purification device in the car exhaust system, the catalytic converter on the exhaust gas purification role is obvious to all, but you know what part of the catalytic converter is the most critical?

The answer is the carrier.

Nowadays, metal carrier and ceramic carrier are the most frequently used carrier materials.

However, the carrier does not actually participate in the catalytic reaction, what can really convert the harmful gases in the exhaust gas into harmless substances is the rare precious metals such as platinum, rhodium and palladium covered on the carrier, which will cause a redox reaction with the harmful gases under high temperature environment, thus playing a role in purifying the exhaust gas.

Similarities between metal and ceramic carriers

In terms of structure, most of the metal and ceramic carriers are honeycomb structures with a density of about 1200 mesh/square inch, in order to increase the catalytic area so that the catalyst can be in full contact with the harmful gases for a more complete redox reaction.

Also the precious metals applied on the wall of the honeycomb carrier as catalytic active material are mostly rough and uneven, which is a way to increase the actual catalytic reaction area of the carrier.

Difference between metal carrier and ceramic carrier

1. Ceramic carrier low cost, overload and high temperature resistance, shorter service life than metal carrier

Currently 90% of vehicles on the market use rare-earth ceramic carrier catalytic converters, the composition of which is mainly aluminum trioxide, which has good corrosion resistance and mechanical properties. Compared with the stainless steel material usually used for metal carriers, ceramic carriers are more affordable.

Moreover, the water absorption of ceramic carrier can strengthen the catalyst coating, and along with the very low thermal expansion system, it can make the carrier internal not to produce big changes under repeated thermal shock, this characteristic also makes ceramic carrier have excellent high temperature resistance and overload resistance.

However, ceramic carriers are more susceptible to carbon deposits and toxins and need to be cleaned or replaced frequently.

2. High cost, high thermal conductivity, high catalytic activity and long service life of metal carrier

Metal carriers are generally aluminum, magnesium, titanium or other stainless steel metal materials with high thermal and electrical conductivity, which can quickly transfer the heat generated in the catalytic reaction, shorten the heating time of the catalyst when the car starts, and can better provide a high enough temperature environment for the catalytic reaction.

Moreover, the catalytic activity of metal carrier is higher than that of ceramic carrier, which can reduce the harmful substances in exhaust gas more effectively. At the same time, the redox property of metal carrier is stronger, which can maintain a better catalytic effect under different working conditions. However, the cost of metal carrier is relatively high and the market share is much lower than that of ceramic carrier.

Although the metal carrier has high temperature resistance, corrosion resistance and other characteristics, so that its service life is more excellent than the ceramic carrier, but this does not mean that the metal carrier has a "gold medal-free", we still need to regularly replace the three yuan, in order to ensure that the exhaust gas can be efficiently cleaned, the vehicle's power is not affected.

If you are not sure how to buy, you can contact us and our professional service team will answer all your questions according to your needs.

GRWA has 10 years of experience in R&D and manufacturing of auto parts, we not only provide various parts products for customers, but also can meet customers' needs of customization. Our products are 100% tested and strictly follow the quality requirements of ISO 9001 and 16949 standards for production control and quality monitoring. Our products have passed international certifications such as SGS, BV and TUV, and are widely favored by car enthusiasts all over the world, and we will be your ultimate best choice.