Titanium Dioxide (Rutile)
TiO2

Rutile is attracting attention not only as a birefringent material for optics but also as a substrate for epitaxial growth.
Our TiO2 crystal has world-leading size, quality, and production volume, and it is made by integrated production system starting from Verneuil crystal growth to the surface polishing.

 

Nb:TiO2 substrate with electrical conductivity and STEP substrates with atomically flat surface are also available. We hope our substrates can help your research.

Characteristics

Composition TiO2
Crystal system Tetragonal
Crystal structure Rutile
Lattice constant a=0.45935 nm, c=0.29580 nm
Melting point 1840 ℃
Growth method Verneuil method
Density 4.252 g/cm3(20 ℃)
Dielectric constant 113 (1 MHz)
Thermal expansion coefficient (30~400℃) (a-axis)7.81×10-6/℃ , (c-axis)10.1×10-6/℃
Band gap 3.0 eV
Refractive index (at 706.5 nm) no=2.5490, ne=2.8226


X-ray rocking curve of rutile crystal

Standard specs

 

Type TiO2 Nb(0.05 wt%) :TiO2 Nb=0.04 at% Nb(0.5 wt%) :TiO2 Nb=0.43 at% Nb(1.0 wt%) :TiO2 Nb=0.86 at%
Purity >99.98 % >99.98 % >99.98 % >99.98 %
Resistivity (Ω・cm) >107 Approx. 5×100 Approx. 3×10-1 Approx. 1.5×10-1
OrientationTolerance:±0.5 °) (100) (110) (001) (100) (110) (001) (100) (110) (001) (100) (110) (001)

Size (Outer size tolerance: ±0.1 mm / Thickness tolerance: ±0.05 mm)

10×10×0.5t

15×15×0.5t

10×10×0.5t

15×15×0.5t

10×10×0.5t

15×15×0.5t

10×10×0.5t

15×15×0.5t

Polishing One-side / Both-side One-side / Both-side One-side / Both-side One-side / Both-side
Surface roughness

Ra≦1.0nm

Rmax≦5.0nm

Ra≦1.0nm

Rmax≦5.0nm

Ra≦1.0nm

Rmax≦5.0nm

Ra≦1.0nm

Rmax≦5.0nm

Flatness

(λ=632.8 nm)

10×10≦λ

15×15≦1.5λ

10×10≦λ

15×15≦1.5λ

10×10≦λ

15×15≦1.5λ

10×10≦λ

15×15≦1.5λ

Options STEP substrate
OFF substrate
Breakable substrate
STEP substrate
OFF substrate
Breakable substrate
STEP substrate
OFF substrate
Breakable substrate
OFF substrate
Breakable substrate

※If you are looking for other specs, please contact us.
※Delivery time (about): Standard model … 1 week after order / Special model … 1 month or more after order