CORE MATERIALS

CORE MATERIALS

CTGS piezoelectric single crystal

The material that forms the core of our products, “Langasite type piezoelectric single crystal (CTGS),” was developed through joint research we conducted with the Yoshikawa Laboratory at the Institute for Materials Research, Tohoku University. It features a highly homogeneous crystal structure, which cannot be achieved with a conventional langasite crystal, and a chemical composition that minimizes the content of rare elements, making sustainable and low-cost development possible.

CTGS piezoelectric single crystal

Langasite structure(general formula: A3BC3D2O14

Langasite structure
  • Site A: Decahedron (8 oxygen cells)
  • Site B: Octahedron (6 oxygen cells)
  • Site C: Tetrahedron (4 oxygen cells)
  • Site D: Small tetrahedron (4 oxygen cells)
Chemical composition of crystals A3 B1 C3 D2
Disorderly La3Ga5SiO14 La Ga Ga Si, Ga
La3Ga5.5Ta0.5O14 La Ta, Ga Ga Ga
La3Ga5.5Nb0.5O14 La Nb, Ga Ga Ga
Orderly Sr3TaGa3Si2O14 Sr Ta Ga Si
Sr3NbGa3Si2O14 Sr Nb Ga Si
Ca3TaGa3Si2O14 Ca Ta Ga Si
Ca3NbGa3Si2O14 Ca Nb Ga Si