History

1960

• Research on Zirconia begins.

1961

• Long rod insulator is developed.
• Dry-type condenser bushing is developed.

1962

• Large hollow insulator (extrusion manufacturing) is developed.
• Rapid sand filter underdrain (porous blocks) technology by Leopold in the USA is introduced.

1963

• First deliveries of Insulator Washing Equipment are made.

1967

• First deliveries of drinking water sludge dewatering systems are made.
• First deliveries of sewage sludge dewatering systems are made.
• First deliveries of oxygen analyzers are made.

1968

• HICERAM translucent alumina ceramic is developed.

Note:

• Products marked with a dot (●) are no longer manufactured or sold (including those transferred to another group company).

1970

• First deliveries of industrial waste incinerators are made.

1972

• Bushing for 1,000 kV-class test transformer is developed.
• Glass lining manufacturing technology from De Dietrich in France is introduced.

1973

• Ceramic road noise control equipment is delivered for the Meishin Expressway.

1974

• First deliveries of fluidized-bed sewage sludge incineration systems are made.
• First deliveries of roller hearth kilns are made.
• Production of molds for tires begins.

1976

• Production of HONEYCERAM, a honeycomb catalyst substrate for controlling automotive emissions, begins.

1978

• First deliveries of low-level radioactive waste incineration systems are made.
• Production of NGK Wall, an enamel wall panel, begins.
• 1,000 kV-class (ultrahigh voltage) 70- and 84-ton suspension insulators are developed.

1981

• New production method for ferrite products for magnetic heads is developed.

Note:

• Products marked with a dot (●) are no longer manufactured or sold (including those transferred to another group company).

1982

• Production of O₂ sensors begins.
• The total floor aeration equipment receives technical evaluation approval from the Ministry of Construction, and the first unit is delivered to Okayama Prefecture’s Takashima Sewage Treatment Plant.

1983

• Ceramic filter for beer filtration is developed.

1984

• Research on NAS battery begins.

1986

• First deliveries of ceramic turbocharger rotors are made.
• Line arrester for power transmission lines is developed.
• A 250 ton/day dryer and fluidized incinerator, one of Japan’s largest, is delivered to the Shingashi Treatment Plant in Tokyo.

1987

• First deliveries of bioreactors are made.
• Sound-absorbing material made from aluminum fibers is developed.

1989

• Production of diesel particulate filters (DPFs) begins.

1990

• First deliveries of the High-Pressure Compaction System for the treatment of non-combustible solid waste are made.

1991

• First deliveries of cyclone-type sewage sludge melting systems are made.

1992

• Testing commercial use in actual transmission system prototype NAS battery begins.

Note:

• Products marked with a dot (●) are no longer manufactured or sold (including those transferred to another group company).