Ceramic ferruls precision process:
Precision of manufacture |
Dimensional accuracy |
Up to 0.001mm |
Smoothness |
Highest possible mirror |
Concentricity |
Up to 0.003mm |
Parallelism |
Up to 0.002mm |
The inner hole tolerance |
The minimum 0.005mm |
Straight flute |
The narrowest 0.1x100mm |
The thickness of the size |
Minimum to 0.02mm |
The screw thread |
Minimum internal thread M2 |
Cylindricity |
Up to 0.004mm |
The linear tolerance |
Up to 0.001mm |
The smallest aperture |
The minimum 0.07mm |
Precision process |
CNC maching,grinding,lapping |
Surface finish |
Glazed,polishing or metallized |
Visual quality:
1. No cracks, no dark dots, no contamination and sharp edges;
2. Evenly distributed glaze with very smooth surface |
Raw materials-Molding process - Sintering - Machining & Grinding - Quality Inspector
|
|
Ceramic Parameter:
Properties |
Units |
AL2O3 |
ZrO2 |
SiC |
Si3N4 |
Density |
g/cm3 |
3.65-3.93 |
5.95-6.0 |
3.12 |
3.23 |
Water absorption |
0 |
0 |
0 |
0 |
0 |
Coefficientof thermal expansion |
10-16/k |
7.9-8.5 |
10.5 |
3 |
3.2 |
Modulus of elasticity young`s mod |
GPa |
280-340 |
210 |
440 |
300 |
Poission`s ratio |
/ |
0.21-0.22 |
0.3 |
0.17 |
0.26 |
HV hardness hv |
MPa |
1650 |
1300-1365 |
2800 |
1500 |
Flexural strength |
MPa |
310 |
950 |
390 |
720 |
Flexural strength(700℃) |
MPa |
230 |
210 |
380 |
450 |
Compressive strength |
MPa |
2200 |
2000 |
1800 |
2300 |
Fracture toughness |
MPa*m1/2 |
4.2 |
10 |
3.9 |
6.2 |
Heat conductivity |
W/m*k |
26-30 |
2-2.2 |
120 |
25 |
Electrical resistivity |
Ω*mm2/m |
>1016 |
>1015 |
>103 |
>1013 |
Max use temperature |
℃ |
1750 |
1050 |
1550 |
1050 |
Resistance to acid alkaline |
/ |
high |
high |
high |
high |
Dielectric constant |
/ |
9.6 |
29 |
9.66-10.03 |
/ |
Dielectric strength |
KV/mm |
8.7 |
9 |
/ |
/ |
Thermal shock resistance |
△T(℃) |
180-220 |
280-350 |
230-260 |
/ |
Tensile strength |
MPa |
248 |
250 |
/ |
/ |
|