Except inheriting the special characters (high strength, high hardness, thermo-endurable capability, anti-chemicals and high chemical stability) of fine ceramics, zirconia also owns better tenacity than ordinary ceramic materials, which enable zirconia to be applied in many industries, such as the production of spindle seals and bearings, cutting tools, molds, and vehicle parts, etc.; it also can be applied for medical applications, such as being the artificial hip joints of human body and similar.

Zirconia material can be categorized into the following four sorts:

1. Fully stabilized zirconia (FSZ)

Formed by complete cubic lattices structure; poor in mechanical properties.

2. Zirconia toughened ceramics (ZTC)

Compound of the 2nd phase and other materials (Al2O3, Si3N4 and glass, etc.); the tenacity and mechanical properties are improved.

3. Partially stabilized zirconia (PSZ)

PSZ is the sort of zirconia material we are producing now; PSZ is made by adding Y2O3 into the zirconia structure base that will make the square lattice phase distributed in the cubic lattice phase; through the phase-change of square lattice phase, the zirconia organization would obtain higher tenacity and thus toughen the PSZ property.

4. Tetragonal zirconia polycrystals (TZP)

TZP is made by adding Y2O3-ZrO2 into the zirconia base, which can get better mechanical properties, higher strength, tenacity and chemical stability; it is widely applied in structure and medical applications.

997 alumina oxide ceramics |  Bullet proof |  High quility sintered silicon carbide
techincal alumina oxide ceramic tube |  High quility sintered silicon carbide ceramics
special alumina oxide screws and nuts |  sintered silicon carbide mechanical seals

About ceramics

The term 'technical ceramics' (or 'engineering ceramics') refers to a broad range of advanced ceramic materials developed for their excellent mechanical, electrical and thermal properties.

Technical ceramic materials feature hardness, physical stability, extreme heat resistance, chemical inertness, biocompatibility and superior electrical properties. As such, they are highly resistant to melting, bending, stretching, corrosion and wear.

Precision-engineered ceramic components are used by design engineers in a wide range of specialist applications from aerospace and semiconductor, electronics, medical, automotive, thermal processing, industrial equipment, defence and security, power generation and distribution and domestic products.

Some technical ceramics are referred to as electro-ceramics because of their special electrical properties. This group includes piezoelectric ceramics and dielectric ceramics.

Piezoelectric ceramics, such as Lead Zirconium Titanate (PZT), have the ability to convert mechanical energy into an electrical energy and vice versa. This 'piezoelectric effect' can be harnessed and used in a wide variety of sensors used in measurement and monitoring applications, energy harvesting and specialist ultrasonic cleaning.

Dielectric ceramics exhibit low electrical loss, but have high dielectric permittivity. They are used in electrical applications such as capacitors and resonators, over a wide range of frequency bands and power ratings. Typical markets are telecoms (GPS, base stations, antennae), medical and lasers (pulse power sources).

Importantly, today's advanced ceramic materials also lend themselves to mass production, offering a cost-effective engineering solution to a wide range of design challenges.

Chair Man Hi-Tech has built a global business on its expertise in ceramic engineering applications, specializing in the design, molding and manufacturing of industry-grade components, especially for hydraulic equipments, including pumps and seals.

Sintered Silicon Carbide | Alumina Oxide | Zirconia Oxide | Tungsten Carbide | Silicon Nitride

We select high-purity inorganic materials to produce fine ceramics under the dry-pressing, casting or injection process, by physic or chemical procedure, to control the compounds and uniformity of products; and we conduct the product microstructure, physical & chemical properties to an advanced base organization standard through reaction or sintering process. In the last process, we machine the products and create excellent performance for application. The fine ceramics feature the following six characters:

1. Anti-corrosion

Most ceramic products own strong anti-oxidation and anti-chemical-corrosion capabilities.

2. High temperature endurable

Rare materials can withstand the very high temperature as a ceramic material does; some precise ceramic products can literally endure a working temperature as high as 1400 and still hold its strength unchanged, whereas the best super alloys can hardly withstand a work temperature of over 1100.

3. Anti-erosion

The anti-erosion capability of precise ceramic materials is the feature widely aware by the industry.

4. Light in weight

Most ceramic materials are lighter than metals; some of them even are 40% lighter than metallic one; light weight is favorable to lower machine loading and save operating energy.

5. Low friction coefficient and high compression strength

The remarkable low coefficient, high compression strength and anti-friction features of fine ceramics make them pretty suitable to be used as mechanical wearing devices, such as spindle seals or bearings, without the need of lubrication.

6. Electrical, magnetic, light and heat characters

Some fine ceramics own special electrical, magnetic, light or heat characteristics.

Although fine ceramics obtain the aforesaid excellent characters, however, the vulnerable low tenacity (brittle) always confuse the ceramic product users; to solve this vulnerability of ceramic materials, we have already made great endeavor to develop the high-tenacity precise ceramic materials.

The Chair Man Hi-tech CO., LTD, founded in 1984, has been consistently dedicating to study and manufacture fine ceramics. We have been investing in the R&D and fabrication of SiC products ever since 2000, and successfully mass-producing the S-SiC products since 2004. To promote product's quality, we keep on purchasing new equipment and elevate the production technological level. Moreover, we also have built a standard quality check system to maximize our quality level in the standardized production line. In 2005, we (Chair Man) have passed the ISO-9001 certification procedure; all of our customers therefore can rely on our product's quality most.

Except asking for product's high quality, we also pay particular attention on our service attitude. We always hold the goal of "Customer First", helping our customers solve problems of various kinds they encounter.

The following are tools that we have.

Spray dryer

Cold isostatic pressing machine

Auto dry pressing machine

Sintering furnace ( Atmosphere sintering furnace is used in alumina oxide and zirconia oxide.

Non-oxidizing atmosphere sintering furnace is used in sintered silicon carbide , silicon nitride and tungsten carbide.)

Auto surface grinder

CNC internal grinder

CNC cylindrical grinder

Centerless grinder

Lapping machine

Densitometer

Wafer inspection microscope

Hardness testing machine