Surface Treatment

Fine Ceramics and Basalt

Yoshikawa Kogyo carries out surface processing (lining) to bond various ceramics materials such as alumina, silicon nitride, and basalt to the surface of metals.We propose antifriction solutions by using a wide range of lining methods and our proven technology, which has been used for over 30 years in industry.

Material

Fine ceramics

Alumina

A typical fine ceramic material is alumina (AL203).It has three features: it is resistant to acids and alkalis; it has high antifriction properties and heat tolerance; and it has a good balance of mechanical strength.
Alumina is relatively inexpensive and has a long track record in industrial fields.Our company prepares highly pure alumina.

Silicon nitride

Silicon nitride is a high-grade material that has even higher strength and antifriction properties than alumina, and has great toughness and thermal shock resistance, even in high temperature environments.

Basalt

Basalt is a material made by melting natural basalt (which consists of silica, alumina, etc.)It excels in terms of antifriction properties, corrosion resistance, heat tolerance, and slipperiness.It is relatively inexpensive and suitable for a wide range of lining processing.Also, it is possible to make large diameter pipes from basalt, which are difficult to make from using ceramics.

A product list (including case studies) is here

Bonding methods

Bonding methods/characteristics

Our company carries out processing in the following way to bond different materials like fine ceramics and metals, or ceramics and basalt.


Bonding with glue	Bonding by using adhesives such as epoxy resin or silicon-type adhesives.This is an inexpensive and generic bonding method.
Rubber vulcanization bonding	Bonding rubber and ceramics by vulcanization.The action of rubber can alleviate impacts on ceramics.The action of rubber can alleviate impacts on ceramics.
Bonding by stud welding	Our company’s characteristic bonding method.Mechanical joints by bonding with stud welding display strong adhesion and the thermal effect on the base material is small.This method can be used in high temperature environments as well.
Bonding by welded fastening	This method bonds metal to a metal base material by plug welding by utilizing ceramics with hole and metallic parts.This method can be used in high temperature environments as well.
Bonding by mortar	The connection by mortar method involves pouring various kinds of mortar between ceramics or basalt and the base material of fittings.

Construction technique

The construction technique can be used for difficult-to-realize linings such as curved surfaces or three-dimensional shapes by utilizing a wide variety of different kinds of materials (large, small, reinforcing, etc.) and our processing techniques, which have been developed over many years.

General industry

Rubber and ceramics liners

We bond ceramics and base materials by vulcanization.Strong impacts on ceramics can be alleviated by coating them with rubber.This is utilized in chutes for masses or powder, hoppers, etc.

Ceramic piping

This improves antifriction characteristics inside pipes by bonding ceramics sleeves with mortar and bonding ceramics chips by gluing.This technology is utilized in conveyance piping for powder or slurry.