Barium Titanate for optical glass

Product Introduction

Barium Titanate (BaTiO₃) is a high-refractive-index ceramic material widely utilized in the formulation of advanced optical glass. Thanks to its excellent transparency, high dielectric constant, and non-linear optical properties, BaTiO₃ serves as an essential additive in specialty glass compositions designed for precision optics, photonics, and laser technologies.

In optical glass manufacturing, BaTiO₃ is used to increase the refractive index while maintaining low dispersion. Its inclusion enhances the optical clarity, improves light transmittance, and allows for precise control over the material’s optical performance. These features make it particularly valuable in the production of camera lenses, optical filters, infrared devices, and specialty glasses for advanced scientific and defense applications.

 

Physical Properties

Item	Spec	Remark
Particle Size Distribution (D50)	0.2 ~ 30 μm	Laser Particle Size Analizer
Water Content (wt%)	0.2 ~ 30μm ：  < 0.5	105℃ × 1Hr
Ignition Loss (wt%)	0.2 ~ 30μm ：  < 1.0	800℃ × 1Hr

 

Chemical Composition (BaTiO3)

Product  No.	BT-1 Series	BT-2 Series	BT-3 Series
BaO/TiO2 ( Mole Ratio)	1.000±0.01	1.000±0.02	1.000±0.03
SrO(wt%)	<0.05	<0.1	<0.3
Fe2O3 (wt%)	<0.01	<0.03	<0.1
K2O+Na2O(wt%)	<0.01	<0.03	<0.1
Al2O3 (wt%)	<0.1	<0.2	<0.3
SiO2(wt%)	<0.1	<0.2	<0.3

 

Chemical Composition(BaTi4O9)

Item	BaTi4O9
BaO/TiO2(Mole ratio)	0.25±0.01
SrO(wt%)	<0.05
Fe2O3 (wt%)	<0.01
Na2O+K2O(wt%)	<0.01
Al2O3 (wt%)	<0.1
SiO2 (wt%)	<0.1

 

Applications:

High-index optical lenses

Optical filters and coatings

Non-linear optical components

Infrared and photonic glass materials

Precision scientific instrumentation

 

FAQ

1: Why is Barium Titanate used in optical glass?

BaTiO₃ significantly increases the refractive index of glass while preserving low dispersion, making it ideal for applications requiring high optical performance and clarity.

2: Is BaTiO₃ transparent in visible and infrared ranges?

Yes, when properly processed into glass compositions, BaTiO₃ contributes to high transparency in both visible and near-infrared wavelengths.

3: What purity levels are available for optical applications?

High-purity grades (typically ≥ 99.9%) of BaTiO₃ are available to meet the stringent optical standards required for lens and filter production.

4: How is BaTiO₃ added to the glass?

BaTiO₃ is typically added as a fine powder during the glass batch melting process and is thoroughly mixed with other glass-forming oxides to ensure uniform dispersion.

5: Can BaTiO₃ affect the durability of the glass?

No, when properly formulated, BaTiO₃ enhances the optical properties without negatively impacting thermal or mechanical stability of the final glass product.

6: What is the typical particle size for optical glass-grade BaTiO₃?

The powder is usually offered in submicron or nano-sized particles to ensure optimal blending and uniformity in the glass melt.