Barium Ferrite (BaFe₁₂O₁₉)

Barium Ferrite (BaFe12O19) is a hard magnetic ceramic powder from the M-type hexaferrite family, prized for combining high intrinsic coercivity with outstanding chemical and thermal stability. Because it is already a fully oxidised ceramic, it resists corrosion and thermal demagnetisation far better than metallic magnet alloys, making it a workhorse material for permanent magnets, magnetic recording media, and microwave-absorbing composites. Infinita Materials supplies submicron barium ferrite powder engineered for consistent particle size distribution and low impurity content, supporting reliable magnetic performance from pressed ceramic magnets to high-coercivity tape and card-stripe coatings. Our production and quality control are tuned to the demands of magnetics manufacturers who need batch-to-batch reproducibility. Custom purities, particle sizes, and cation-substituted grades are available for specialised electronic and RF applications.

Surface Area (m²/g) :	N/A
Particle size d₅₀ (μm) :	<1.5
Purity (%) :	>99.9

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Description

Introduction to Barium Ferrite Powder

Barium Ferrite (BaFe₁₂O₁₉) is a hard magnetic hexagonal ferrite with the magnetoplumbite structure (P6₃/mmc), consisting of alternating spinel-like and hexagonal blocks. Its ferrimagnetic Fe³⁺ sublattices produce strong uniaxial magnetocrystalline anisotropy along the c-axis, giving high coercivity, moderate remanence, and excellent resistance to demagnetisation. As a spray-grade magnetic powder, controlled particle size, morphology, and purity are critical for achieving consistent magnetic performance and high-frequency response. Barium ferrite is widely used in permanent magnets, magnetic recording media, and microwave-frequency applications, including radar-absorbing materials, isolators, and circulators. Its low cost, thermal stability, and resistance to corrosion make it an economical alternative to rare-earth magnetic materials.

FAQs

Question: Why is BaFe₁₂O₁₉ used in electronic devices? Its high magnetic anisotropy, thermal stability, and semiconducting properties make it suitable for microwave devices, spintronics, and sensors.

Answer: Its high magnetic anisotropy, thermal stability, and semiconducting properties make it suitable for microwave devices, spintronics, and sensors.

Question: How does Barium Ferrite compare with other ferrites in electronic applications?

Answer: BaFe₁₂O₁₉ is highly stable at high frequencies and temperatures and is, therefore, suitable for specific advanced applications, such as spintronics and microwave devices.

Question: Is Barium Ferrite environmentally friendly?

Answer: Yes, chemical stability and non-toxicity attributes make Barium Ferrite an environmentally friendly chemical compound.

Question: Can barium ferrite properties be tailored through doping or substitution?

Answer: Yes. Partial substitution of iron or barium sites, for example with aluminum or lanthanum-cobalt pairs, is a well-established way to raise or lower coercivity and adjust the anisotropy field for a specific magnet or microwave-absorber application; Infinita Materials can produce custom-substituted grades on request.

Introduction to Barium Ferrite Powder

Property	Value	Significance
Intrinsic Coercivity (Hci)	~160-400 kA/m (approx. 2,000-5,000 Oe), grade dependent	Determines resistance to demagnetisation; sets whether a grade suits ceramic magnets, Hi-Co magnetic stripes, or high-density tape media
Remanence (Br)	~0.20-0.44 T (2,000-4,400 G), grade dependent	Sets the residual magnetic field strength available from a fully magnetised part or coating
Saturation Magnetisation (Ms)	~48-72 emu/g (theoretical single-crystal value ~72 emu/g)	Upper bound on achievable magnetic output; strongly influenced by particle size, phase purity, and processing
Curie Temperature (Tc)	~450 C (723 K)	Maximum temperature at which ferrimagnetic ordering persists; governs safe processing and end-use operating limits
Particle Size (D50)	< 1.5 microns	Finer, uniform particles support higher single-domain coercivity and consistent dispersion in bonded magnets, tapes, and coatings.
Purity	99% – 99.9% (up to 99.99% custom)	Minimises non-magnetic secondary phases and impurity ions that would otherwise reduce coercivity and saturation magnetisation
Density	~5.28 g/cm3	Used for magnet mass/volume design calculations and to gauge powder loading in bonded-magnet and coating formulations
CAS Number	12047-11-9	Unique identifier used for procurement, safety data sheets, customs classification, and regulatory documentation

Property

Value

Significance

Intrinsic Coercivity (Hci)

~160-400 kA/m (approx. 2,000-5,000 Oe), grade dependent

Determines resistance to demagnetisation; sets whether a grade suits ceramic magnets, Hi-Co magnetic stripes, or high-density tape media

Remanence (Br)

~0.20-0.44 T (2,000-4,400 G), grade dependent

Sets the residual magnetic field strength available from a fully magnetised part or coating

Saturation Magnetisation (Ms)

~48-72 emu/g (theoretical single-crystal value ~72 emu/g)

Upper bound on achievable magnetic output; strongly influenced by particle size, phase purity, and processing

Curie Temperature (Tc)

~450 C (723 K)

Maximum temperature at which ferrimagnetic ordering persists; governs safe processing and end-use operating limits

Particle Size (D50)

< 1.5 microns

Finer, uniform particles support higher single-domain coercivity and consistent dispersion in bonded magnets, tapes, and coatings.

Purity

99% – 99.9% (up to 99.99% custom)

Minimises non-magnetic secondary phases and impurity ions that would otherwise reduce coercivity and saturation magnetisation

Density

~5.28 g/cm3

Used for magnet mass/volume design calculations and to gauge powder loading in bonded-magnet and coating formulations

CAS Number

12047-11-9

Unique identifier used for procurement, safety data sheets, customs classification, and regulatory documentation

Grade / Form	Typical Purity	Key Features / Uses
Standard Ceramic Magnet Grade	99.0% – 99.5%	Cost-effective general-purpose grade for sintered and bonded ceramic permanent magnets
High-Purity Electronic Grade	99.9%+	Low trace-metal content suited to magnetic recording media and precision microwave/RF components
Submicron Powder (D50 < 1.5 microns)	> 99.9%	Fine, uniform particle size for high-coercivity magnetic stripe and tape coatings
Nanopowder Grade (20-100 nm)	99.5% – 99.9%	Nanoscale particles for microwave-absorber composites, thin films, and research applications
Custom Cation-Substituted Grades	Custom on request	Al-, La-Co-, or other ion-substituted BaFe12O19 with tailored coercivity for specialised magnet or recording applications

Grade / Form

Typical Purity

Key Features / Uses

Standard Ceramic Magnet Grade

99.0% – 99.5%

Cost-effective general-purpose grade for sintered and bonded ceramic permanent magnets

High-Purity Electronic Grade

99.9%+

Low trace-metal content suited to magnetic recording media and precision microwave/RF components

Submicron Powder (D50 < 1.5 microns)

> 99.9%

Fine, uniform particle size for high-coercivity magnetic stripe and tape coatings

Nanopowder Grade (20-100 nm)

99.5% – 99.9%

Nanoscale particles for microwave-absorber composites, thin films, and research applications

Custom Cation-Substituted Grades

Custom on request

Al-, La-Co-, or other ion-substituted BaFe12O19 with tailored coercivity for specialised magnet or recording applications

Industry	Application	Function
Permanent Magnets	Sintered and bonded ceramic (ferrite) magnets for motors, actuators, and relays	Provides a low-cost, corrosion-resistant hard magnetic phase with high coercivity
Data Storage	Magnetic recording tape, including linear tape (LTO-class) media	High-coercivity magnetic pigment enables stable, high-density data retention
Financial & Security	Magnetic stripe cards – credit, ID, and hotel key cards	High-coercivity (Hi-Co) stripe layer resists accidental erasure from stray magnetic fields
Telecommunications & Defence	Microwave absorbers, isolators, circulators, and radar-absorbing composites	Strong magnetocrystalline anisotropy drives ferromagnetic resonance absorption at microwave/RF frequencies.
Automotive	DC motors, alternators, and actuator assemblies	Compact, thermally stable permanent-magnet component supporting consistent torque output
Consumer Electronics	Loudspeaker magnets and magnetic sensor assemblies	Stable magnetic field source that resists thermal and stray-field demagnetisation

Industry

Application

Function

Permanent Magnets

Sintered and bonded ceramic (ferrite) magnets for motors, actuators, and relays

Provides a low-cost, corrosion-resistant hard magnetic phase with high coercivity

Data Storage

Magnetic recording tape, including linear tape (LTO-class) media

High-coercivity magnetic pigment enables stable, high-density data retention

Financial & Security

Magnetic stripe cards – credit, ID, and hotel key cards

High-coercivity (Hi-Co) stripe layer resists accidental erasure from stray magnetic fields