Demystified: Process route and application of Yaduma spherical silica

Spherical silica particles have the characteristics of smooth surface, large specific surface area, high hardness and appropriate fluidity.

Process route for the preparation of Yaduma spherical silica

Japanese company Admatechs (Yaduma) disperses silicon powder in a gas stream of oxygen to ignite and burn, and the reactants are turned into steam or liquid by the heat of reaction.

The reaction process is shown in the figure below:

Preparation process of sub-micron spherical silica

Index parameters of Yaduma high-purity sub-micron spherical silica

For the production of spherical silica particles with a large particle size (average particle size ranging from 5 to 30 μm), Admatechs uses a surface melting method to put the crystal-broken silica into a furnace and use the surface Tension makes it spherical and cools and solidifies

Yaduma micron-sized silica preparation process

Yaduma Spherical Silica Application Field

Spherical silica produced by Yaduma has excellent comprehensive properties, whether it is an adhesive that makes thermal conductivity and electrical insulation flexibly used, or a liquid resin that allows high fluidity and toughness to coexist, or it is resistant to heat and weather resistance.

01 Electronic circuit packaging field

Computers and smart phones in daily life are inseparable from the use of copper clad laminates.

Copper Clad Laminate

02 LED lighting field

LED lights are widely used in daily life, but the light emitted by LEDs is linear, and we can only use part of them directly

LED bulb

03 Field of Thermal Insulation Coatings

In recent years, as global warming has intensified, people increasingly need to stay cool in summer
.
In order to meet this demand, the spherical silica produced by Yaduma can also be used in the field of thermal insulation coatings
.
Because the spherical silica mixed in the thermal insulation coating has a certain size structure, it can effectively reflect a part of the sunlight, thereby inhibiting the heating of the foundation wall by the sunlight
.

Thermal insulation coating

04 Mobile

The thinness and lightness of mobile phones has always been the goal of mobile phone manufacturers.
Mobile phone IC packaging requires more refined and high-performance materials.
It is essential to use small-size, high-purity spherical silica to ensure this goal
.

05 Processing aids

The spherical silica particles produced by Yaduma can improve the fluidity of powders and spray materials (metal powder, ceramic powder, nylon beads, gypsum, etc.
), so as to achieve a uniform supply of powder during the 3D printer powder sintering lamination molding process
.
It can also be used as organic or mechanical grinding metal powders, inorganic powders and functional ceramics, inorganic pigments and other additives
.
It can also be used as a sintering aid, ink lubricant, powder catalyst, dispersibility improver, and as a light/heat stabilizer
.

Admatechs uses different methods to prepare spherical silica with different sizes and structures to meet the specific needs of different industries for spherical silica
.
For domestic silicon powder production enterprises, Yaduma's silicon powder combustion method produces high-purity, low-iron, and low-radioactive element submicron spherical silica technology, which is more worth learning
.