Barium Zirconium Titanate (BaZr_0.2Ti_0.8O₃)

Barium Zirconium Titanate (BZT) powder is a high-purity, perovskite-structured dielectric ceramic precursor engineered by partially substituting titanium with zirconium in the barium titanate lattice. This B-site substitution diffuses the sharp ferroelectric-to-paraelectric phase transition of pure barium titanate into a broad, temperature-stable dielectric response, making BZT powders a preferred feedstock for high-permittivity, temperature-stable multilayer ceramic capacitors and lead-free piezoelectric research. Infinita Materials supplies BZT powder across a range of Zr substitution levels and purity grades, processed for consistent phase purity, controlled particle size distribution, and reliable sinterability. Each lot is characterised for phase composition, particle morphology, and dielectric performance to support reproducible ceramic processing from lab-scale trials through pilot production. The material ships with full documentation to support qualification in capacitor, sensor, and actuator manufacturing workflows.

Surface Area (m²/g) :	>3
Purity (%) :	99.95
Crystallite Size (nm) :	~200

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Description

Introduction to Barium Zirconium Titanate Powder

Barium Zirconium Titanate (BZT, BaZrₓTi₁₋ₓO₃) is a tunable perovskite solid solution between BaTiO₃ and BaZrO₃, with Ba²⁺ occupying the A-site and Ti⁴⁺/Zr⁴⁺ sharing the B-site. Because the larger Zr⁴⁺ ion suppresses Ti⁴⁺ off-centring, increasing Zr content expands the lattice, reduces tetragonal distortion, and progressively lowers and broadens the ferroelectric transition. At higher Zr concentrations, BZT can exhibit relaxor-like behaviour with diffuse, frequency-dependent dielectric responses. Supplied as a fine, chemically homogeneous powder, BZT enables precise composition and particle-size control during calcination and sintering, minimising secondary phases and promoting fine-grained, dense ceramics. It is widely used in multilayer ceramic capacitors, temperature-stable dielectric components, tunable capacitors, and piezoelectric devices.

FAQs

Question: What is barium zirconium titanate?

Answer: Barium zirconium titanate (BaZr₀.₂Ti₀.₈O₃) is a ceramic material that combines barium titanate and barium zirconate. It is known for its enhanced dielectric, ferroelectric, and piezoelectric properties.

Question: What are the main applications of BaZr₀.₂Ti₀.₈O₃?

Answer: It is used in multilayer capacitors, piezoelectric sensors and actuators, nonlinear optical devices, energy harvesting systems, and ferroelectric memory technologies.

Question: How does the composition of BaZr₀.₂Ti₀.₈O₃ affect its properties?

Answer: Substituting zirconium for titanium in the crystal structure alters the dielectric constant, Curie temperature, and piezoelectric properties, allowing for tuning based on specific applications.

Question: Is barium zirconium titanate toxic?

Answer: Barium zirconium titanate is non-toxic and safe in its ceramic form.

Question: What is the dielectric constant of BaZr₀.₂Ti₀.₈O₃?

Answer: The dielectric constant typically ranges from 1,000 to 2,500. However, it depends on the composition and temperature.

Introduction to Barium Zirconium Titanate Powder

Property	Value	Significance
Chemical formula	BaZr0.2Ti0.8O3 (BZT-20 composition; general form BaZrxTi(1-x)O3, x = 0.05-0.35)	Defines the Ti: Zr B-site ratio, which sets the transition temperature and degree of dielectric diffuseness
CAS number	37305-89-8 (generic supplier registry number for barium zirconate titanate; see dataNotes)	Used industry-wide for procurement and SDS documentation of the BZT material class
Purity	99% – 99.95%, higher purity available on request	Controls residual second-phase content and dielectric loss in sintered ceramics
Molar mass	241.86 g/mol (for x = 0.2; varies with Zr fraction)	Used for stoichiometric batch calculations during solid-state or wet-chemical synthesis
Density	5.7 – 6.2 g/cm³ (theoretical, composition-dependent)	Benchmark for evaluating sintered ceramic densification and porosity
Particle size	D50 0.2 – 2 µm; nano grades ~200 nm crystallite size, BET SSA >3 m²/g	Finer, narrower distributions promote uniform sintering and higher green/fired density
Dielectric constant	~2,000 – 6,000 (1 kHz, room temperature to near-Tm, composition-dependent)	High permittivity supports capacitance miniaturisation in MLCC dielectric layers
Curie/transition behaviour	Broad, diffuse ferroelectric-paraelectric transition, typically 40-70 degC for x = 0.20 (vs. sharp ~125 degC peak in pure BaTiO3)	Diffuseness flattens the permittivity-vs-temperature curve, improving thermal stability of capacitance.

Property

Value

Significance

Chemical formula

BaZr0.2Ti0.8O3 (BZT-20 composition; general form BaZrxTi(1-x)O3, x = 0.05-0.35)

Defines the Ti: Zr B-site ratio, which sets the transition temperature and degree of dielectric diffuseness

CAS number

37305-89-8 (generic supplier registry number for barium zirconate titanate; see dataNotes)

Used industry-wide for procurement and SDS documentation of the BZT material class

Purity

99% – 99.95%, higher purity available on request

Controls residual second-phase content and dielectric loss in sintered ceramics

Molar mass

241.86 g/mol (for x = 0.2; varies with Zr fraction)

Used for stoichiometric batch calculations during solid-state or wet-chemical synthesis

Density

5.7 – 6.2 g/cm³ (theoretical, composition-dependent)

Benchmark for evaluating sintered ceramic densification and porosity

Particle size

D50 0.2 – 2 µm; nano grades ~200 nm crystallite size, BET SSA >3 m²/g

Finer, narrower distributions promote uniform sintering and higher green/fired density

Dielectric constant

~2,000 – 6,000 (1 kHz, room temperature to near-Tm, composition-dependent)

High permittivity supports capacitance miniaturisation in MLCC dielectric layers

Curie/transition behaviour

Broad, diffuse ferroelectric-paraelectric transition, typically 40-70 degC for x = 0.20 (vs. sharp ~125 degC peak in pure BaTiO3)

Diffuseness flattens the permittivity-vs-temperature curve, improving thermal stability of capacitance.

Grade / Form	Typical Purity	Key Features / Uses
BZT-5 (BaZr0.05Ti0.95O3)	99% – 99.9%	Slightly depressed, still fairly sharp Curie point; near-BaTiO3 behaviour with modest temperature-stability improvement
BZT-10 (BaZr0.10Ti0.90O3)	99% – 99.9%	Broadened transition, higher room-temperature permittivity; used in early-stage X7R-type formulation trials
BZT-20 (BaZr0.20Ti0.80O3)	99% – 99.95%	Most widely studied composition; diffuse transition near room temperature, strong dielectric tunability, benchmark for MLCC and BCZT piezoelectric research
BZT-30 (BaZr0.30Ti0.70O3)	99% – 99.9%	Pronounced relaxor-like dispersion, low remnant polarisation; used in energy-storage and tunable-dielectric studies
High-purity nano BZT (5N, sol-gel/co-precipitation derived)	99.99% – 99.999%	Sub-200 nm crystallites with narrow size distribution for thin-film, MLCC, and advanced piezoceramic research

Grade / Form

Typical Purity

Key Features / Uses

BZT-5 (BaZr0.05Ti0.95O3)

99% – 99.9%

Slightly depressed, still fairly sharp Curie point; near-BaTiO3 behaviour with modest temperature-stability improvement

BZT-10 (BaZr0.10Ti0.90O3)

99% – 99.9%

Broadened transition, higher room-temperature permittivity; used in early-stage X7R-type formulation trials

BZT-20 (BaZr0.20Ti0.80O3)

99% – 99.95%

Most widely studied composition; diffuse transition near room temperature, strong dielectric tunability, benchmark for MLCC and BCZT piezoelectric research

BZT-30 (BaZr0.30Ti0.70O3)

99% – 99.9%

Pronounced relaxor-like dispersion, low remnant polarisation; used in energy-storage and tunable-dielectric studies

High-purity nano BZT (5N, sol-gel/co-precipitation derived)

99.99% – 99.999%

Sub-200 nm crystallites with narrow size distribution for thin-film, MLCC, and advanced piezoceramic research

Industry	Application	Function
Electronics manufacturing	Multilayer ceramic capacitors (MLCCs)	Provides high, temperature-stable dielectric constant for compact, high-capacitance layers meeting X7R/X8R-type specifications
Piezoelectric devices	Lead-free BCZT (Ba,Ca)(Zr,Ti)O3 actuators and sensors	Serves as the BZT precursor phase combined with barium calcium titanate to achieve morphotropic-phase-boundary piezoelectric response
Sensing and transduction	Ultrasonic transducers and pressure sensors	Ferroelectric/piezoelectric coupling converts mechanical stress into a measurable electrical signal.
Energy harvesting	Vibration and thermal energy harvesters	Diffuse phase transition sustains usable piezoelectric/pyroelectric response over a wider operating temperature range.
Telecommunications	Tunable filters and resonators	Voltage-dependent (tunable) permittivity enables frequency-agile microwave dielectric components.
Data storage and memory	Ferroelectric memory (FeRAM) research	Switchable polarisation state stores binary information in nonvolatile memory cells

Industry

Application

Function

Electronics manufacturing

Multilayer ceramic capacitors (MLCCs)

Provides high, temperature-stable dielectric constant for compact, high-capacitance layers meeting X7R/X8R-type specifications

Piezoelectric devices

Lead-free BCZT (Ba,Ca)(Zr,Ti)O3 actuators and sensors

Serves as the BZT precursor phase combined with barium calcium titanate to achieve morphotropic-phase-boundary piezoelectric response

Sensing and transduction

Ultrasonic transducers and pressure sensors

Ferroelectric/piezoelectric coupling converts mechanical stress into a measurable electrical signal.