Ceramic Screws
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We provide a wide variety including ceramic metric threads, unified threads, freesized threads, etc. Free options are available for the head shape, such as the pan, flat, hexagon (neck bolt), hexagon socket (head cap bolt) and pan (head gas hole). The material could be also widely selected from alumina, zirconia, etc. Any size from M1 to the neck is available for manufacturing. We offer them with a high quality and a low price.
Alumina Al2O3
name：KMA995
cream color
Alumina is a typical example of Fine Ceramics. In terms of mechanical properties, alumina offers abrasion resistance and high strength. In terms of thermal properties, it has high heat resistance. In terms of electrical properties, it is a material with excellent electrical insulation properties. Another feature of Fine Ceramics is that they are relatively inexpensive. Applications include wear-resistant components, corrosion-resistant components, semiconductor manufacturing equipment components, and high-temperature zone components.
name：KMG995
white-color*1
It is characterized by its white color tone while having almost the same level of purity as KMA, and its characteristic values are almost the same as those of KMA.
Applications are the same as KMA995, for those who desire white color.
Zirconia ZrO2
name：KMZr
white color
High mechanical properties, high strength, and high toughness compared to alumina. It is a recommended material if strength is the only requirement.Low thermal conductivity. It has a heat shielding effect.
Applications include wear-resistant materials, industrial knives, and other toughness applications
Silicon carbide (SiC) SiC
name：KNTSiC、KTSiC
Black color
It has relatively high thermal conductivity and semiconductive electrical properties at the level of static electricity elimination.
Chemical resistance and high hardness are also its characteristics.
Applications include chemical resistant parts, high temperature range parts, and static electricity eliminating parts.
Checca silicon Si3N4
name：KTSN
gray color
One of the characteristics of this material is its high strength and toughness with excellent thermal shock resistance.
It is also a material that does not easily undergo thermal expansion.
Applications include high-temperature zone components, crusher components, and metal jigs.
Aluminum nitride AlN
name：KFAN170
gray color
If you are looking for heat conduction while insulating, this material has excellent heat dissipation properties.
Applications include heat equalization components, high temperature zone components, and semiconductor manufacturing equipment components.
Steatite MgO・SiO2
name：KCSt
white color
Excellent insulation properties even at high temperatures. It is also a material with excellent machinability.
Applications include circuit components
Zircon cordierite
name：KYCS
gray color
This material has high heat resistance, low thermal expansion, and low thermal conductivity.
Applications include heat-resistant, low-thermal-expansion materials and stages for semiconductor probers.
*1：Discoloration may occur if left under ultraviolet light for long periods of time
Click for the material PDF
Kimura Tech Corporation Material Characteristics Table
| Classification | Alumina | Zirconia | SiC | Si3N4 | AlN | Steatite | Zircon cordierite | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| name | KMA995 | KMG995 | KMA96 | KMZr | KTSiC | KTSN | KFAN170 | KCSt | KYCS | ||
| main ingredient | ％ | 99.7 | 99.6 | 96 | 92 | ||||||
| color | cream | white | white | white | black | gray | gray | white | gray | ||
| bulk density | g/cm3 | 3.9 | 3.9 | 3.7 | 6 | 3.1 | 3.2 | 3.3 | 2.8 | 2.7 | |
| machine | Bending strength | Mpa | 400 | 390 | 320 | 1000 | 450 | 800 | 350 | 200 | 150 |
| Young’s modulus | Gpa | 390 | 380 | 300 | 210 | 400 | 300 | – | 120 | – | |
| Vickers hardness | GPa | 14 | 14 | 13 | 13.2 | 24 | 16 | – | 5.6 | – | |
| Poisson’s ratio | – | 0.24 | 0.24 | 0.23 | 0.31 | – | – | – | – | – | |
| Fracture toughness | Mpam1/2 | 4.1 | 4 | 3.5 | 4 | 4.6 | 6 | – | – | – | |
| heat | Thermal expansion coefficient | ＊10-6 | 6.4 | 5.8 | 7.7 | 11 | 4 | 3 | 4.5 | 6.5 | 2～3 |
| Thermal conductivity | W/(m・K） | 30 | 28 | 21 | 3 | 80 | 17 | 170 | 3 | 1.2 | |
| specific heat | J/(kg/K) | 0.78＊103 | 0.78＊103 | 0.78＊103 | – | – | – | – | – | – | |
| electricity | dielectric constant | [1MHz] | 10.1 | 6.4 | 9.5 | – | – | 8.5 | 8.8 | 6 | 6.5 |
| dielectric tangent | ＊10-4 | 50 | – | – | – | – | – | 5 | 18 | – | |
| volume resistivity | Ω・㎝ | 1015 | 1015 | 1014 | 1012 | 103～104 | 1012 | 1013 | 1014 | 1013 | |
| Breakdown Voltage | kV/mm | 12 | 16 | 10 | 11 | – | – | 15 | 13 | 10 | |
| feature | high strength Insulating Large abrasion resistance chemical resistance |
high strength abrasion resistance High Fracture Toughness Low heat conduction |
conductivity high strength chemical resistance lightweight |
high strength abrasion resistance Thermal shock resistance lightweight |
high strength Insulation high thermal conductivity lightweight |
Insulating Large | Low thermal expansion Low heat conduction lightweight |
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| use | wear-resistant material Corrosion Resistant Parts Semiconductor Equipment Components |
Wear Resistant Parts Industrial Cutlery |
mechanical seal Sliding parts High Temperature Components |
grinder molten metal、Elastic Machined Parts |
Heat Equalizing Components High-temperature processing jig Semiconductor Equipment Components |
Circuit Components | Heat-resistant parts Low thermal expansion parts Halogen Lamp Parts |
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The above values are for reference only and are not guaranteed. The values may vary depending on the shape.
