Strontium Titanate (SrTiO₃)

Strontium titanate (SrTiO3) powder is a cubic perovskite oxide prized for its high room-temperature dielectric constant and exceptional thermal and chemical stability. Manufactured to tight stoichiometric and particle-size tolerances, this powder serves as a critical raw material for multilayer ceramic capacitors, dielectric resonators, varistors, and single-crystal substrate production. Available from standard 99.9% purity through ultra-high-purity 99.999% grades, and in particle sizes from submicron to nanoscale, our SrTiO3 powder is engineered for consistent sintering behaviour and reproducible electrical performance batch to batch. Whether formulating a barium strontium titanate (BST) tunable dielectric or growing epitaxial oxide films, our technical team can tailor grade, particle size distribution, and packaging to your process requirements.

Surface Area (m²/g) :	>10
Particle size d₅₀ (μm) :	N/A
Purity (%) :	>99.9
Crystallite Size (nm) :	~100

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Description

Introduction to Strontium Titanate Powder

Strontium Titanate (SrTiO₃) is a cubic perovskite oxide (Pm-3m) consisting of corner-linked TiO₆ octahedra, with Sr²⁺ occupying the A-sites. It remains highly symmetric at room temperature and undergoes an antiferrodistortive tetragonal transition below approximately 105 K. SrTiO₃ is a quantum paraelectric with a high, temperature-dependent dielectric constant, typically around 300 at room temperature, and excellent chemical and thermal stability. Supplied as a fine, chemically uniform powder, SrTiO₃ provides controlled particle size, surface area, and packing during calcination and sintering, promoting uniform grain growth and low porosity. It is widely used in advanced ceramics, dielectric components, capacitor formulations, and as a tunable additive with BaTiO₃ for controlling permittivity and temperature characteristics.

FAQs

Question: What is Strontium Titanate?

Answer: Strontium titanate, called SrTiO₃, is a perovskite-structured oxide with notable electronic, optical, and dielectric properties, which have led to many technological applications.

Question: What are the main properties of SrTiO₃?

Answer: The fundamental properties include a high dielectric constant, wide bandgap (approximately 3.2 eV), ferroelectric behavior below 105K, and potential superconductivity when doped.

Question: Is SrTiO₃ toxic or hazardous?

Answer: SrTiO₃ is generally considered safe to handle, but as with any chemical, proper safety precautions should be taken during handling and processing.

Question: Is Strontium Titanate transparent?

Answer: Yes, SrTiO₃ is optically transparent in the visible range, making it useful in photonic applications.

Introduction to Strontium Titanate Powder

Property	Value	Significance
Chemical Formula	SrTiO3	Confirms 1:1:3 Sr: Ti:O perovskite stoichiometry used for dielectric ceramic formulation calculations
CAS Number	12060-59-2	Unique substance identifier for procurement, regulatory documentation, and safety data sheet cross-referencing
Purity	99.9% – 99.99% (up to 99.999% available)	Higher purity reduces dielectric loss and leakage current in finished capacitor and resonator ceramics
Density	5.11 – 5.13 g/cm³	Determines theoretical packing density used to calculate green-body and sintered-ceramic porosity targets
Particle Size (D50)	~100 nm – 5 µm depending on grade	Finer particle size increases sinterability and surface reactivity for lower-temperature ceramic firing.
Crystal Structure	Cubic perovskite (Pm-3m); tetragonal below ~105 K	Cubic symmetry gives isotropic dielectric response, critical for uniform capacitor performance
Dielectric Constant	~300 at room temperature (undoped, low field)	High permittivity enables compact, high-capacitance MLCC and resonator designs
Bandgap	~3.2 eV (indirect); ~3.75 eV (direct)	Wide bandgap supports optical transparency and insulating behaviour needed for dielectric applications.

Property

Value

Significance

Chemical Formula

SrTiO3

Confirms 1:1:3 Sr: Ti:O perovskite stoichiometry used for dielectric ceramic formulation calculations

CAS Number

12060-59-2

Unique substance identifier for procurement, regulatory documentation, and safety data sheet cross-referencing

Purity

99.9% – 99.99% (up to 99.999% available)

Higher purity reduces dielectric loss and leakage current in finished capacitor and resonator ceramics

Density

5.11 – 5.13 g/cm³

Determines theoretical packing density used to calculate green-body and sintered-ceramic porosity targets

Particle Size (D50)

~100 nm – 5 µm depending on grade

Finer particle size increases sinterability and surface reactivity for lower-temperature ceramic firing.

Crystal Structure

Cubic perovskite (Pm-3m); tetragonal below ~105 K

Cubic symmetry gives isotropic dielectric response, critical for uniform capacitor performance

Dielectric Constant

~300 at room temperature (undoped, low field)

High permittivity enables compact, high-capacitance MLCC and resonator designs

Bandgap

~3.2 eV (indirect); ~3.75 eV (direct)

Wide bandgap supports optical transparency and insulating behaviour needed for dielectric applications.

Grade / Form	Typical Purity	Key Features / Uses
Standard Powder Grade	99.9%	General-purpose raw material for dielectric ceramics, varistors, and MLCC body formulations
High-Purity Grade	99.95% – 99.99%	Lower trace-metal content for improved insulation resistance and reduced dielectric loss
Ultra-High-Purity Grade (5N)	99.999%	Research-grade feedstock for single-crystal growth, epitaxial substrate precursors, and thin-film target fabrication
Nanopowder / Submicron Grade	99.9%+ (D50 ~100-500 nm)	High surface area for low-temperature sintering, fine-grain microstructures, and enhanced reactivity in solid-state synthesis
Doped Powder Grades (Nb-, La-doped)	Custom purity	Engineered electrical conductivity for semiconducting SrTiO3 electrodes and low-temperature superconductivity research

Grade / Form

Typical Purity

Key Features / Uses

Standard Powder Grade

99.9%

General-purpose raw material for dielectric ceramics, varistors, and MLCC body formulations

High-Purity Grade

99.95% – 99.99%

Lower trace-metal content for improved insulation resistance and reduced dielectric loss

Ultra-High-Purity Grade (5N)

99.999%

Research-grade feedstock for single-crystal growth, epitaxial substrate precursors, and thin-film target fabrication

Nanopowder / Submicron Grade

99.9%+ (D50 ~100-500 nm)

High surface area for low-temperature sintering, fine-grain microstructures, and enhanced reactivity in solid-state synthesis

Doped Powder Grades (Nb-, La-doped)

Custom purity

Engineered electrical conductivity for semiconducting SrTiO3 electrodes and low-temperature superconductivity research

Industry	Application	Function
Electronics Manufacturing	Multilayer ceramic capacitors (MLCCs)	High-permittivity dielectric layer raw material co-fired with electrode metals
Telecommunications & RF	Dielectric resonators and microwave filters	Stable, low-loss high-k dielectric medium for frequency-selective resonant circuits
Power Electronics	Varistors and surge-suppression devices	Grain-boundary barrier-layer capacitor formulations for voltage-dependent resistance
Semiconductor & Substrate Manufacturing	Epitaxial substrate precursor material	Feedstock for lattice-matched single-crystal substrates used in oxide and superconducting thin-film growth
Advanced Dielectric Ceramics	Barium strontium titanate (BST) precursor	Sr-bearing raw material co-processed with barium titanate to produce voltage-tunable dielectric compositions.
Photonics & Optics	Optical waveguides and photonic components	High-refractive-index, optically transparent oxide for integrated photonic device layers

Industry

Application

Function

Electronics Manufacturing

Multilayer ceramic capacitors (MLCCs)

High-permittivity dielectric layer raw material co-fired with electrode metals

Telecommunications & RF

Dielectric resonators and microwave filters

Stable, low-loss high-k dielectric medium for frequency-selective resonant circuits

Power Electronics

Varistors and surge-suppression devices

Grain-boundary barrier-layer capacitor formulations for voltage-dependent resistance