CTGS

Catangasite - Calcium Tantalum Gallium Silicate, is a crystal of a langasite group family, having 32-point symmetry group. Chemical formula: Ca3TaGa3Si2O14. Method for the production - the Czochralski method. It has good chemical stability and excellent temperature characteristics. Catangasite has two the steadiest cuts with Euler angles (0°,90°,0°) and (0°,90°,40°). Catangasite used for BAW high-temperature products (500°C). It can also be used in high-temperature (>700°C) sensors of physical quantities.

Characteristic Value Measurement units
1. Hygroscopic property N/A -
2. Hysteresis effect N/A -
3. Dielectric capacity ε11 = 18;
ε33 = 235
-
4. Q-factor 19000 -
5. Symmetry class 32 -
6. EMC coefficient (BAW) 16 %
6. EMC coefficient (SAW) 0.35 (0°;90°;0°);
0.16 (0°;90°;40°)
%
7. Cell parameters a = 8.141x10-10;
c = 4.992x10-10
m
8. Pyroelectric effect N/A -
9. Density 4.62 g/cm3
10. Piezoelectric modulus d11 = 4;
d14 = 14
pC/N
13. SAW velocity 2777 (0°;90°;0°);
2815 (0°;90°;40°)
m/s
11. Insulation resistance >1х1012 at 25°C;
>1x108 at 538°С
ohm
12. Curie temperature N/A оС
13. Melting temperature 1350 оС
14. Temperature Frequency Coefficient -35 (0°;90°;0°);
0 (0°;90°;40°)
ppm/°C
14. Elastic flexibility SE11 = 8.95x10-12; m2/N
15. Resistivity 1.7х109 ohm*cm