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Spherical quartz powder
Has excellent properties including smooth surface, high surface area, hardness and stability of chemical properties. The spherical particles are fluid and can be mixed evenly with resin to create a film. The resin amount is low, while the quartz powder filling is high.
The lower the thermal conductivity and the smaller thermal expansion coefficient the molding compound, the higher the amount of quartz powder. The performance of the electronic component produced is better if the thermal expansion coefficient of silicon monocrystalline is close to that of the molding compound.
It is made by purifying and ultra-finely grinding natural quartz stone, and then passing it through a high temperature field. This causes its phase, shape and crystal to change instantly, from a solid to a molten to a solid state. The three most common preparation methods are high-temperature Plasma melting, high-temperature Melting Injection Method and Gas Combustion Flame Method.
Plasma melting at High Temperature
The high temperature plasma melting method sprays quartz powder into the plasma flame using high-temperature gases generated by AC/DC arc plasma. The powder is heated to melt and vaporize, then quenched. A cyclone and cloth bag are used to collect the powder. This produces spherical silica powder. It is characterized as a high heating temperature which can achieve a temperature field more than five times higher than chemical burning (above 3000K). A high temperature, high heat, and a high active atmosphere cause the chemical reaction to proceed quickly. This leads to the rapid formation high temperature phase compounds, which are difficult for liquid phase chemistry to synthesize. Such as nitrides carbides and borides etc. After rapid cooling, particles that have left the plasma will not grow.
The technology of plasma is extremely difficult. First, magnetic and electric properties of plasma can affect the temperature field. The temperature field has a small and concentrated size. Second, the generation of plasma energy is achieved by the current flowing through the ionized medium. A plasma that is too diluted will interfere with the current, and the effect will be lost. It is hard to control how fast the product spheroidizes.
High Temperature Melt Injection
The high-temperature injection method involves melting the material to a liquid by putting it in a hot field. When the melt comes out of the ejector it is sprayed high-pressured air, which breaks up the melt and disperses it into a mist. When the droplets cool down, they shrink back into smooth spheres. The method of high temperature melt spraying ensures a spherical and amorphous product. The key technologies of viscous quartz melting atomization in furnaces, high temperature materials for the quartz, and prevention secondary pollution are still not fully developed. This makes it difficult to make high-purity spherical powder.
Gas Combustion Flame method
The gas combustion method produces a flame using acetylene and hydrogen. It also uses natural gas, other fuel gases, and oxygen as supporting gas. Angular quartz powder and air are transported simultaneously into the fire. As the angular particles pass through the high temperature flame field, they are first melted to amorphous particle form. It shrinks immediately into spherical powder when it exits the high temperature field. The cyclone then collects the final product. Thermodynamics, gas dynamics and particle hydrodynamics are all involved in this method. The temperature field in plasma high-temperature fires is much lower and there are also fewer factors that influence it. It does not involve electromagnetic theory or the flow ions in an electromagnetic field. The movement problem makes it easier to manage various conditions. Equipment manufacturing is simplified, industrialization is easy, and development prospects are better.
Tech Co., Ltd. is a professional oxide powder We are a chemical product supplier with 12 years of experience. We accept payment by Credit Card, T/T (West Union), Paypal and T/T. The goods will be shipped to overseas customers via FedEx or DHL.
You can contact us for high quality spherical crystalline quartz powder. Contact us Send an inquiry.
The lower the thermal conductivity and the smaller thermal expansion coefficient the molding compound, the higher the amount of quartz powder. The performance of the electronic component produced is better if the thermal expansion coefficient of silicon monocrystalline is close to that of the molding compound.
It is made by purifying and ultra-finely grinding natural quartz stone, and then passing it through a high temperature field. This causes its phase, shape and crystal to change instantly, from a solid to a molten to a solid state. The three most common preparation methods are high-temperature Plasma melting, high-temperature Melting Injection Method and Gas Combustion Flame Method.
Plasma melting at High Temperature
The high temperature plasma melting method sprays quartz powder into the plasma flame using high-temperature gases generated by AC/DC arc plasma. The powder is heated to melt and vaporize, then quenched. A cyclone and cloth bag are used to collect the powder. This produces spherical silica powder. It is characterized as a high heating temperature which can achieve a temperature field more than five times higher than chemical burning (above 3000K). A high temperature, high heat, and a high active atmosphere cause the chemical reaction to proceed quickly. This leads to the rapid formation high temperature phase compounds, which are difficult for liquid phase chemistry to synthesize. Such as nitrides carbides and borides etc. After rapid cooling, particles that have left the plasma will not grow.
The technology of plasma is extremely difficult. First, magnetic and electric properties of plasma can affect the temperature field. The temperature field has a small and concentrated size. Second, the generation of plasma energy is achieved by the current flowing through the ionized medium. A plasma that is too diluted will interfere with the current, and the effect will be lost. It is hard to control how fast the product spheroidizes.
High Temperature Melt Injection
The high-temperature injection method involves melting the material to a liquid by putting it in a hot field. When the melt comes out of the ejector it is sprayed high-pressured air, which breaks up the melt and disperses it into a mist. When the droplets cool down, they shrink back into smooth spheres. The method of high temperature melt spraying ensures a spherical and amorphous product. The key technologies of viscous quartz melting atomization in furnaces, high temperature materials for the quartz, and prevention secondary pollution are still not fully developed. This makes it difficult to make high-purity spherical powder.
Gas Combustion Flame method
The gas combustion method produces a flame using acetylene and hydrogen. It also uses natural gas, other fuel gases, and oxygen as supporting gas. Angular quartz powder and air are transported simultaneously into the fire. As the angular particles pass through the high temperature flame field, they are first melted to amorphous particle form. It shrinks immediately into spherical powder when it exits the high temperature field. The cyclone then collects the final product. Thermodynamics, gas dynamics and particle hydrodynamics are all involved in this method. The temperature field in plasma high-temperature fires is much lower and there are also fewer factors that influence it. It does not involve electromagnetic theory or the flow ions in an electromagnetic field. The movement problem makes it easier to manage various conditions. Equipment manufacturing is simplified, industrialization is easy, and development prospects are better.
Tech Co., Ltd. is a professional oxide powder We are a chemical product supplier with 12 years of experience. We accept payment by Credit Card, T/T (West Union), Paypal and T/T. The goods will be shipped to overseas customers via FedEx or DHL.
You can contact us for high quality spherical crystalline quartz powder. Contact us Send an inquiry.