Strontium Titanate (SrTiO₃) – Supplier & Manufacturer in USA

Strontium Titanate, SrTiO₃

Strontium titanate (SrTiO3) is a cubic perovskite ceramic oxide best known as the archetypal substrate for epitaxial oxide and superconducting thin films, and as a quantum paraelectric with an exceptionally high, temperature-tunable dielectric constant. Supplied by Infinita Materials as ceramic sputtering targets, SrTiO3 is deposited to grow buffer layers, dielectric films, and functional oxide coatings for electronics, photonics, and energy research. Its perovskite structure and wide, stable bandgap give sputtered SrTiO3 films optical transparency, high permittivity, and excellent chemical and thermal stability.

Purity (%) :	>99.9
Dimensions :	Dia. 1”, Thick. 0.125” Dia. 2”, Thick. 0.25”

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Introduction to Strontium Titanate

Strontium Titanate SrTiO₃ is a cubic perovskite oxide (Pm-3m) with a lattice constant of approximately 3.905 Å, transforming to a tetragonal phase below 105 K. It is a wide-bandgap, insulating, optically transparent material with high refractive index and exceptional dielectric properties. Its quantum paraelectric behaviour produces a dielectric constant that increases dramatically at cryogenic temperatures without developing conventional ferroelectric order. These characteristics make SrTiO₃ valuable for complex-oxide research. RF sputtering from ceramic targets enables controlled deposition of insulating films, while Nb-doped SrTiO₃ supports DC or pulsed-DC sputtering. Films are used as epitaxial templates, buffer layers, high-k dielectrics, tunable capacitors, superconducting heterostructures, and transparent conducting oxide research.

FAQs

Question: What makes SrTiO₃ a preferred material for sputtering targets?

Answer: SrTiO₃ combines excellent thermal stability, high dielectric properties, and a tunable perovskite structure, making it ideal for various thin-film applications.

Question: How is SrTiO₃ used in optoelectronic devices?

Answer: SrTiO₃’s transparency and electrical conductivity enable its use in photodetectors, optical coatings, and other optoelectronic components.

Question: Why is SrTiO₃ significant as a substrate material?

Answer: Its lattice match and thermal stability make it a preferred choice for the epitaxial growth of superconductors and complex oxide thin films.

Question: Can SrTiO₃ be used in energy storage applications?

Answer: Yes, SrTiO₃ is employed in supercapacitors and other energy storage systems due to its high capacitance and stability.

Question: What role does SrTiO₃ play in photocatalysis?

Answer: SrTiO₃ acts as a photocatalyst for environmental applications, such as breaking down pollutants and aiding hydrogen production via water-splitting.

Introduction to Strontium Titanate

Property	Value	Significance
Crystal Structure	Cubic perovskite (Pm-3m) at room temperature; transforms to tetragonal below approximately 105 K	Near-ideal cubic lattice and close lattice match to many functional oxides make it a preferred epitaxial template material
Lattice Constant	~3.905 Angstroms (cubic, room temperature)	Governs epitaxial strain and matching to superconducting and complex-oxide films grown on sputtered SrTiO3 layers
Molar Mass	~183.49 g/mol	Basis for stoichiometry calculations and process control during reactive or co-sputtering
Density (theoretical)	~5.11 g/cm3	Affects target sputter yield, erosion behaviour, and achievable film packing density
Melting Point	~2080 C	High thermal stability supports target integrity under sustained magnetron power loading
Band Gap	~3.2-3.25 eV (indirect)	Wide-bandgap insulator; undoped films are optically transparent and require RF rather than DC sputtering of the ceramic
Dielectric Constant	~300 at room temperature, rising toward ~10,000 at cryogenic temperatures (quantum paraelectric)	Extreme, temperature-tunable permittivity is the basis for tunable capacitor and cryogenic dielectric applications
Thermal Conductivity	Comparatively low (on the order of a few W/m-K at room temperature)	Ceramic is susceptible to thermal shock and cracking under high sputter power, favouring bonded target assemblies and controlled power ramping

Property

Value

Significance

Crystal Structure

Cubic perovskite (Pm-3m) at room temperature; transforms to tetragonal below approximately 105 K

Near-ideal cubic lattice and close lattice match to many functional oxides make it a preferred epitaxial template material

Lattice Constant

~3.905 Angstroms (cubic, room temperature)

Governs epitaxial strain and matching to superconducting and complex-oxide films grown on sputtered SrTiO3 layers

Molar Mass

~183.49 g/mol

Basis for stoichiometry calculations and process control during reactive or co-sputtering

Density (theoretical)

~5.11 g/cm3

Affects target sputter yield, erosion behaviour, and achievable film packing density

Melting Point

~2080 C

High thermal stability supports target integrity under sustained magnetron power loading

Band Gap

~3.2-3.25 eV (indirect)

Wide-bandgap insulator; undoped films are optically transparent and require RF rather than DC sputtering of the ceramic

Dielectric Constant

~300 at room temperature, rising toward ~10,000 at cryogenic temperatures (quantum paraelectric)

Extreme, temperature-tunable permittivity is the basis for tunable capacitor and cryogenic dielectric applications

Thermal Conductivity

Comparatively low (on the order of a few W/m-K at room temperature)

Ceramic is susceptible to thermal shock and cracking under high sputter power, favouring bonded target assemblies and controlled power ramping

Grade / Form	Typical Purity	Key Features / Uses
Standard catalogue target (1 in- 2 in dia.)	>99.9% (3N)	Off-the-shelf ceramic discs sized for common lab and pilot magnetron platforms; IN-SrTi-01 / IN-SrTi-02 catalogue codes
High-purity optical/electronic grade	99.99% (4N) – 99.999% (5N)	Reduced trace-metal content for electro-optic, photonic, and dielectric research where impurities introduce leakage current or optical absorption
Niobium-doped conductive grade	>99.9%, Nb-doped (typically 0.01-1 wt% Nb)	Electrically conductive SrTiO3 target enabling DC or pulsed-DC magnetron sputtering for higher deposition rates than RF alone
Large-format / custom planar and rotary target	>99.9%, custom purity on request	Rectangular planar targets up to approximately 800mm and cylindrical/rotary formats for pilot and production in-line coaters
Bonded target assembly	>99.9% – 99.99%	SrTiO3 tile elastomer- or indium-bonded to a copper backing plate to manage this brittle, low-thermal-conductivity ceramic’s thermal shock risk during high-power operation

Grade / Form

Typical Purity

Key Features / Uses

Standard catalogue target (1 in- 2 in dia.)

>99.9% (3N)

Off-the-shelf ceramic discs sized for common lab and pilot magnetron platforms; IN-SrTi-01 / IN-SrTi-02 catalogue codes

High-purity optical/electronic grade

99.99% (4N) – 99.999% (5N)

Reduced trace-metal content for electro-optic, photonic, and dielectric research where impurities introduce leakage current or optical absorption

Niobium-doped conductive grade

>99.9%, Nb-doped (typically 0.01-1 wt% Nb)

Electrically conductive SrTiO3 target enabling DC or pulsed-DC magnetron sputtering for higher deposition rates than RF alone

Large-format / custom planar and rotary target

>99.9%, custom purity on request

Rectangular planar targets up to approximately 800mm and cylindrical/rotary formats for pilot and production in-line coaters

Bonded target assembly

>99.9% – 99.99%

SrTiO3 tile elastomer- or indium-bonded to a copper backing plate to manage this brittle, low-thermal-conductivity ceramic’s thermal shock risk during high-power operation

Industry	Application	Function
Superconducting and complex-oxide electronics	Epitaxial substrate and buffer layers for high-Tc superconducting and oxide heterostructure films	Cubic perovskite lattice closely matched to YBCO and related complex oxides transmits crystallographic order into device layers.
Cryogenic and quantum electronics	Tunable microwave capacitors and cryogenic dielectric layers	Extreme, temperature-dependent dielectric constant enables voltage- and temperature-tunable capacitance for cryogenic and quantum circuit research
Photonics and electro-optics	Thin-film electro-optic and nonlinear optical devices	Strain-engineered SrTiO3 films exhibit induced Pockels (electro-optic) response useful for cryogenic photonic modulators
Transparent conducting oxide research	Nb-doped SrTiO3 conductive films	Niobium doping converts the wide-bandgap insulator into a conductive, optically transparent oxide for electrode and interface studies.
Sensors and electroceramics	Varistor, grain-boundary, and dielectric device research	Grain-boundary and permittivity behaviour support high-field varistor and capacitor-dielectric characterisation
Energy and catalysis	Solid oxide fuel cell electrode coatings and photocatalytic films	Perovskite framework accommodates doping (e.g. La, Fe) for mixed ionic-electronic conduction and photocatalytic activity

Industry

Application

Function

Superconducting and complex-oxide electronics

Epitaxial substrate and buffer layers for high-Tc superconducting and oxide heterostructure films

Cubic perovskite lattice closely matched to YBCO and related complex oxides transmits crystallographic order into device layers.

Cryogenic and quantum electronics

Tunable microwave capacitors and cryogenic dielectric layers

Extreme, temperature-dependent dielectric constant enables voltage- and temperature-tunable capacitance for cryogenic and quantum circuit research

Photonics and electro-optics

Thin-film electro-optic and nonlinear optical devices

Strain-engineered SrTiO3 films exhibit induced Pockels (electro-optic) response useful for cryogenic photonic modulators