HONEYCERAM: Substrates for automobile catalytic converters

NGK Insulator's fine ceramic technology is appreciated worldwide by automobile manufacturers.

A ceramic catalyst carrier, HONEYCERAM neutralizes the harmful substances in automobile exhaust. HONEYCERAM’s honeycomb design results in a large surface area–the area that comes into contact with exhaust–with minimal installation requirements. In fact, the area coated by the gas-purifying catalyst on a palm-size HONEYCERAM would cover an area equivalent to two soccer grounds. For maximum exhaust gas cleaning efficiency, HONEYCERAM was designed to have minimal weight and wall thickness: The 0.05 mm walls minimize loss of engine power. The remarkable properties of cordierite ceramics like HONEYCERAM make it possible to withstand high temperatures and sudden changes in the temperature of exhaust gas.


Offered in square or hexagonal cell configurations (the latter especially effective in conserving the volume of catalyst used), HONEYCERAM is used by auto manufacturers worldwide. The total production of HONEYCERAM has reached about 1.5 billion units.


Designed for use with large diesel vehicles, this HONEYCERAM model carries a catalyst that removes particulate matter (PM) as well as nitrogen oxide (NOx) from diesel exhaust gas

DPFs, Gasoline particulate filters, NOx sensors

Diesel particulate filters/gasoline particulate filters

Lightweight cordierite filters (both sides of the photograph) are mainly used in trucks, buses, construction machinery, and other large vehicles. The more heat-resistant silicon carbide filters (center of the photograph) are used in passenger cars. NGK Insulators also offers a dedicated filter for gasoline direct-injection engine.

NOx sensors

These were the world’s first sensors to detect concentrations of NOx in a vehicle in real time. Our NOx sensors consist of ZrO 2 elements and are based on oxygen pumping technology.

Industrial process products

Heating devices, kilns, and refractories

Refined over long years of producing ceramics, our high-precision, energy-efficient heating technologies have enabled us to develop a tremendous lineup of heating devices and refractories, used widely across industries ranging from the cutting edge (solar cells and lithium-ion batteries) to traditional (pottery). 

Wavelength-control drying systems

Having developed various heating systems, including devices using hot air and far infrared rays, in 2012, NGK Insulators announced a new light-based drying system. By selectively irradiating light at specific wavelengths, the unit can dry at low temperatures (approximately 40 °C) while limiting thermal damage to products, helping to enhance product quality and to improve productivity.