Synthetic diamond powder granulation

Homogeneous diamond tools by Freeze Granulation

Synthetic diamond powder granulation by Freeze Granulation is today being used for to make homogeneous granules for diamond tools with long tool-life and optimal performance.

Please contact us for more information and a test-granulation of your diamond powder system.

Synthetic diamond powder granulation

Synthetic diamond powder granulation

Synthetic diamond powder granulation

Spray-freezing and freeze drying

Spray-freezing and freeze drying – Freeze Granulation

PowderPro AB develop, manufacture, market and sell equipment and know-how for Freeze Granulationspray freezing and subsequent freeze drying (lyophilization or cryodesiccation). Freeze Granulation was developed in late 1980s at Swedish Ceramic Institute in Göteborg and it is also a development of Spray Freeze Drying (SFD) and Spray Freezing into Liquid (SFL).

Spray cooling or rather called spray freezing is the first step in the freeze granulation process where a suspension is atomized, sprayed with a nozzle, into a chamber with liquid nitrogen. The small droplets are then rapidly frozen with a minimum of ice crystal growth. The frozen material (granules) are then transferred to a freeze dryer where the ice is removed by sublimation, i e never go through a liquid state that ensure homogeneity preservation.

Below you can see an illustration of the Freeze Granulation process.

Please contact us for more information and a test-granulation of your powder system.

Illustration of Freeze Granulation

Illustration of Freeze Granulation

Nano ice formation in granules

Nano ice in granules by Freeze Granulation

Nano ice formation in granules by Freeze Granulation process is a key factor for the unique homogeneity of particles and binders achieved in the resulting granules. This is especially important for nanopowders, fine particles and binders where migration of these could occur during conventional drying, like spray drying.

Please contact us for more information and a test-granulation of your powder system.

Granule with nano-ice and nanopowder

Nano-ice formation in granules of nanoparticles

LED photoluminescence granulation

LED photoluminescence granulation

Freeze Granulation is today used for commercial production of homogeneous granules for the production of oxides used as a ceramic phosphor plate for white illumination in LED Lighting. By using Freeze Granulation of the powder and binder mixture, compared with spray drying, it is possible to manufacture a homogeneous phosphor plate with optimal properties for to generate a soft and warm white light from high power LEDs.

Please contact us for more information and a test-granulation of your powder system.

LED photoluminescence granulation

LED photoluminescence granulation

Freeze Granulation produce flowable and crushable (soft) granules

Freeze Granulation produce flowable and crushable (soft) granules suitable for die pressing applications. Spray drying yield flowable, but hard granules which are difficult to cruch during die pressing.

Please contact us for more information and a test-granulation of your powder system.

Freeze Granulation vs Spray Drying advantages

Freeze Granulation vs Spray Drying

Can you make spherical granules?

Yes, with Freeze Granulation it’s possible to make spherical, homogeneous and dust-free granules with optimal flowability which is critical for automatic uniaxial pressing of for ex ceramics and metal powders.

You can expect spherical and homogenous granules of powders in terms of distribution of particle size  and other possible additives you want to use. The granules with a size distribution in the range of 50-300 microns will have weak inter particle bonding making them easy to break down in pressing or re-disperse into another formulation. Very much depend upon how you intend to process the powder and depending on that, adaptation can be made.  If you tell us more we can further discuss the opportunities.

Spherical granules made by Freeze Granulation

Synthetic diamond powder granulation

Homogeneous diamond tools by Freeze Granulation

Freeze Granulation of synthetic diamond powder is today being used for to make homogeneous granules for diamond tools with long tool-life and optimal performance. Please contact us for more information and a test-granulation of your system.

 

Diamond composite granules

Spherical, dust-free, homogeneous granules – no donuts!

Nano ice formation in granules

Nano ice in granules by Freeze Granulation

The formation of nano ice in the Freeze Granulation process is a key factor for the unique homogeneity of particles and binders achieved in the resulting granules. This is especially important for nanopowders, fine particles and binders where migration of these could occur during conventional drying, like spray drying.

Please contact us for more information and a test-granulation of your powder system.

Nano ice formation in granule

Cross section of homogeneous nano ice in granules

Freeze drying

Spray Freeze Drying for Soft Granules by Freeze Granulation

Freeze drying is an important processing step in Freeze Granulation where we sublimate the solvent (ice if water) from our spray frozen (spray freezed) granules, resulting in a free-flowing and dust-free granulated material suitable for pressing of components.

Please contact us for more information and a test-granulation of your powder system.

 

Freeze dryer Lyovac GT-2