Machinable technical ceramics
Final Advanced Materials provides a full range of high temperature machinable technical ceramics according to your drawings.
A precise definition of dense ceramic materials, very close to most known sintered ceramics, in use in all technologies where heat resistance, abrasion resistance, chemical resistance, mechanical strength are criteria justifying their use. However, these ceramics involve a specific equipment and know-how in terms of mechanical machining or shaping.
On the contrary, machinable technical ceramics are easily manufactured by means of conventional machine tools. These ceramics can be sawn, drilled, milled, turned with classic tools, available in all general mechanical workshops.
Machinable technical ceramics allow the production of small series parts, as well as validation prototypes. A single ceramic cannot meet all the requirements and all the requests, that is why we have developed over the years, a full range of easily machinable ceramic materials, capable of responding to a maximum of constraints. The tables below will help you to choose the most appropriate product according to your application.
Our wide range of machinable ceramics
Machinable Alumina
Cotronics® Rescor® 960 is a 96% Alumina, machinable ceramic that is usable to 1650°C. It is manufactured from high purity alumina by a unique process.
Machinable Macor® Glass Ceramic
Macor® machinable glass ceramic is recognized worldwide to be a major technological innovation, as well as a technical solution for a wide range of industrial applications.
Machinable Aluminium Nitride
Aluminium nitride is an electrical insulating refractory material having very high thermal conductivity, higher than that of copper at 200°C, and showing high resistance to oxidation and abrasion.
Machinable Boron Nitride
Boron nitride is a white solid material in the as produced hot pressed form. It is a low porosity solid. It is easily machined into complex shapes using standard carbide tooling.
Machinable Quartz
The electrical fusion process uses resistance heating to melt highly refined quartz sand into semi finished quartz glass products.
Machinable Shapal M™
Shapal M™ is an electrical insulating refractory material. Unlike sintered ceramics, machining with conventional tools is possible.
Machinable Porous Silica
Cotronics® Rescor® 310M is a 99% porous silica ceramic, easy to machine, porous silica board resist to 1650°C maximum.
Machinable Alumina Silicate
Aluminia silicate is a pyrophyllite rock. The ore that we have selected, features exceptional mechanical and thermal performances.
Machinable Vitro800 Glass Ceramic
Vitro 800 machinable glass ceramic is an economic alternative to Macor®.
|
Properties |
Units |
Alumina silicate raw |
Alumina silicate 1100 °C |
Alumina silicate 1300 °C |
Macor® |
Glass ceramic (Vitro 800) |
|
Physical characteristics |
||||||
|
Density |
g/cm3 |
2.9 |
2.4 |
2.5 |
2.52 |
2.7 |
|
Porosity |
% |
1.5 - 2 |
0 - 0.5 |
0 |
0.096 |
10 |
|
Water uptake |
% |
1.5 - 2 |
0 - 0.5 |
0 -0.5 |
0 |
0.038 |
|
|
||||||
|
Hardness |
|
Mohs: 2.5 |
Mohs: 5.5 |
Mohs: 7.5 |
Rockwell A: 48 |
Mohs: 4 |
|
Compressive Strength |
N/mm2 |
6 |
150 |
800 |
345 |
488 |
|
Flexural Strength |
N/mm2 |
12 |
50 |
80 |
94 |
108 |
|
Modulus of Elasticity |
GPa |
- |
- |
- |
66.9 |
65 |
|
Thermal characteristics |
||||||
|
Peak Temperature |
°C |
900 |
1100 |
1400 |
1000 |
800 |
|
Continuous Temperature |
°C |
700 |
1100 |
1300 |
800 |
800 |
|
Specific Heat at 20 °C |
J/kg.°K |
- |
- |
- |
0.79 |
/ |
|
Thermal Conductivity at 100 °C |
W/m°K |
1.07 |
1.7 |
2.2 |
1.46 |
1.68 |
|
Coefficient of Expansion |
|
|
|
|||
|
20 - 40 °C |
|
- |
- |
- |
9.3 |
/ |
|
20 - 600 °C |
10-6/°K
|
- |
2.9 - 3.6 |
6-8 |
11.4 |
8,6 |
|
20 - 800 °C |
- |
/ |
/ |
/ |
/ |
|
|
20 - 1000 °C |
|
7-12 |
4-10 |
/ |
/ |
/ |
|
Electrical characteristics |
||||||
|
Specific Resistivity at 20 °C |
Ohm.cm |
10-10 |
10-12 |
10-12 |
10-17 |
1.8 x 1014 |
|
Dielectric at 20 °C |
at 1 kHz |
/ |
/ |
6.1 |
6.03 |
6~7 |
|
Loss Tangent |
at 1 kHz |
/ |
/ |
9X10-5 |
0.005 |
/ |
|
Dielectric Strength at 20 °C |
KV / mm |
8-10 |
6-7 |
12 -17 |
40 |
> 15 |
|
Chemical characteristics |
||||||
|
Corrosion resistance at 20 °C |
B |
B |
B |
B |
B |
B |
|
Resistance to alkalis et 20 °C |
B |
B |
B |
B |
TB |
TB |
|
Properties |
Units |
Machinable alumina |
Machinable boron nitride |
Aluminium nitride (Shapal M™) |
Machinable Aluminium nitride |
|
Physical characteristics |
|||||
|
Density |
g/cm3 |
3.8 |
1.85 |
2.9 |
2.9 |
|
Porosity |
% |
10 |
14 |
0 |
<0.1 |
|
Water uptake |
% |
2-3.5 |
/ |
0 |
0 |
|
Mechanical characteristics |
|||||
|
Hardness |
|
Mohs: 5 |
Knopp : 4 kg/mm² |
Vickers : 3900 kg/mm² |
Vickers : 3750 kg/mm² |
|
Compressive Strength |
MPa |
422 |
20 |
1200 |
1170 |
|
Flexural Strength |
MPa |
267 |
50 |
300 |
300 |
|
Modulus of Elasticity |
GPa |
/ |
/ |
190 |
180 |
|
Thermal characteristics |
|||||
|
Peak Temperature |
°C |
1650 |
850 (1150 inerte) |
1000 (1900 inerte) |
1000 (1900 sous vide) |
|
Continuous Temperature |
°C |
1650 |
850 (1150 inerte) |
1000 (1900 inerte) |
1000 (1900 sous vide) |
|
Specific Heat at 20 °C |
J/kg.°K |
- |
810 |
- |
- |
|
Thermal Conductivity at 100 °C |
W/m°K |
- |
90 |
90 |
90 |
|
Coefficient of Expansion |
10-6 /°K |
||||
|
20 - 40 °C |
|
- |
- |
4.4 |
- |
|
20 - 600 °C |
|
- |
- |
4.8 |
4.5 |
|
20 - 800 °C |
|
- |
- |
5.1 |
- |
|
20 - 1000 °C |
|
0.57 |
- |
- |
- |
|
Electrical characteristics |
|||||
|
Specific Resistivity at 20 °C |
Ohm.cm |
1014 |
1014 |
1012 |
1012 |
|
Dielectric at 20 °C |
9 (à 100kHz) |
4 |
7.1 |
7.1 |
|
|
Loss Tangent |
|
0.0012 |
0.001 |
- |
|
|
Dielectric Strength at 20 °C |
kV/mm |
7.87 |
2 |
40 |
40 |
|
Chemical characteristics |
|||||
|
Corrosion resistance at 20 °C |
|
B |
- |
- |
- |
|
Resistance to alkalis et 20°C |
B |
- |
- |
- |
|
Alumina 960 machinable ceramic
Alumina silicate machinable ceramic
Aluminium nitride machinable ceramic
Boron nitride machinable ceramic
Macor® machinable ceramic
Porous silica machinable ceramic
Quartz glass machinable ceramic
Shapal M™ machinable ceramic
