Танталат лития (LiTaO3)
Lithium tantalate (LiTaO3) is a piezoelectric crystal, which, unlike lithium niabate, has greater mechanical strength. Therefore, it can be used where the strength of lithium niobate is insufficient (for example, in vibration conditions). Also, crystals have a pronounced pyroelectric effect. This material has good stability, and its piezoelectric properties are slightly inferior to lithium niobate.
Specifications
|
Properties |
Conditions |
Units of measurement |
Crystal |
|
LiTaO₃ |
|||
|
Size of wafer |
— |
" |
3 / 4 / 6 |
|
Orientation |
— |
— |
X112° / Y28° / Y36° / Y42° / YX / по запросу |
|
Curie temperature |
— |
°C |
605±3 |
|
Doped with |
— |
— |
Fe |
|
Surface treatment |
— |
— |
SSP / DSP |
|
Thickness |
— |
мм |
0,18 / 0,25 / 0,35 / 0,50 / 1,00+ по запросу |
|
Tolerance (TTV) |
— |
мкм |
< 1~5 |
|
BOW |
— |
мкм |
±(25~40) |
|
Warp |
— |
мкм |
≤ 35 |
|
LTV |
5x5 mm |
мкм |
< 1,5 |
|
PLTV |
5x5 mm |
% |
≥98 |
|
Polished side |
Ra |
Å |
≤ 5 |
|
Back side criteria |
Ra |
мкм |
0,5 ~ 1,0 |
Application area
-
Electro-optical modulators
-
Acousto-optic shutters
-
Optical gyroscopes
-
Other devices based on surface and volumetric acoustic waves, which require increased mechanical strength of the crystal or for miniaturization of products.