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Spherical magnesium oxide and preparation method thereof

A magnesium oxide and spherical technology, applied in magnesium oxide and other directions, can solve the problems of poor product stability, poor thermal conductivity, and unsatisfactory cost performance, and achieve the effects of good sphericity, long service life and high cost performance.

Inactive Publication Date: 2018-12-28
天津泽希矿产加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of poor thermal conductivity, poor product stability and unsatisfactory cost performance of electronic components in the prior art, the present invention provides a spherical magnesium oxide with high fluidity and excellent thermal conductivity and its manufacturing method

Method used

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  • Spherical magnesium oxide and preparation method thereof
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Embodiment 1

[0025] The preparation method of spherical alumina: provide a purity of 89%, an average particle size of 5-90μm, a moisture content of 4%wt, and a density of 3.0g / cm 3 The magnesia powder is put into the feeding system 1, and is supplied to the combustion system 2 at a pressure of 0.01KPa, and the oxygen, natural gas and magnesia powder used for combustion enter the melting system 3 through the combustion system 2, and the oxygen and natural gas form a high-temperature flame , flame melting of magnesium oxide powder, natural gas flow rate 290m 3 / h, oxygen flow rate 180m 3 / h, the furnace temperature of the melting system 3 is 1300°C; the magnesium oxide powder is melted after passing through the flame, and cooled at the lower end of the melting system 3, and the rapid cooling rate is 800°C / s; the spherical magnesium oxide is sucked by the induced draft system 6 through the pipeline To the cyclone system 4 and the bag system 5 for classification, the flow rate of the induced ...

Embodiment 2

[0027] The preparation method of spherical alumina: provide a purity of 85%, an average particle size of 5-90μm, a moisture content of 3%wt, and a density of 3.1g / cm 3 The magnesia powder is put into the feeding system 1, and is supplied to the combustion system 2 at a pressure of 0.016KPa, and the oxygen, natural gas and magnesia powder used for combustion enter the melting system 3 through the combustion system 2, and the oxygen and natural gas form a high-temperature flame , flame melting of magnesium oxide powder, natural gas flow rate 300m 3 / h, oxygen flow 160m 3 / h, the furnace temperature of the melting system 3 is 1500°C; the magnesium oxide powder is melted after passing through the flame, and is cooled at the lower end of the melting system 3, and the rapid cooling rate is 900°C / s; the spherical magnesium oxide is sucked by the induced draft system 6 through the pipeline To the cyclone system 4 and the bag system 5 for classification, the flow rate of the induced d...

Embodiment 3

[0029] The preparation method of spherical alumina: provide a purity of 99%, an average particle size of 5-90μm, a moisture content of 1.5%wt, and a density of 3.6g / cm 3 The magnesia powder is put into the feeding system 1, and is supplied to the combustion system 2 at a pressure of 0.04KPa, and the oxygen, natural gas and magnesia powder used for combustion enter the melting system 3 through the combustion system 2, and the oxygen and natural gas form a high-temperature flame , flame melting of magnesium oxide powder, natural gas flow rate 280m 3 / h, oxygen flow rate 170m 3 / h, the furnace temperature of melting system 3 is 1400°C; the magnesium oxide powder is melted after passing through the flame, and cooled at the lower end of the melting system 3, and the rapid cooling rate is 1000°C / s; the spherical magnesium oxide is sucked by the induced draft system 6 through the pipeline To the cyclone system 4 and the bag system 5 for classification, the flow rate of the induced d...

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Abstract

The invention provides spherical magnesium oxide. The purity content of the spherical magnesium oxide is 85% or above, the average grain diameter is 2-150 microns, the degree of sphericity is greaterthan or equal to 0.86, the content amount is 8% or below, and the density is 3.0-3.8 g / cm<3>. The invention also provides a preparation method of the spherical magnesium oxide. The preparation methodcomprises the steps that magnesium oxide powder with the purity of 89%-99%, the grain diameter of 5-90 microns and the moisture content of 3% or below is provided; the magnesium oxide powder is moltenthrough a flame melting method to form a spherical liquid drop like melt, oxygen and natural gas are selected as combustion-supporting gas, and high-temperature flame is formed; cooling formation isperformed to form the spherical magnesium oxide; the spherical magnesium oxide is graded. The spherical magnesium oxide has the advantages that the spherical magnesium oxide has specific ingredient composition and average grain diameter, has good degree of sphericity and has the advantages of better liquidity, excellent heat-conducting property and the like, a finished product made by adopting theelectronic heat-conducting material has excellent heat dissipation performance, long service life, high performance cost ratio and high heat conductivity coefficient and is higher than magnesium oxide in single crystal thermal conductivity.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, and in particular relates to a spherical magnesium oxide and a manufacturing method thereof. Background technique [0002] Thermally conductive materials widely used in the field of electronic heat conduction include metals, metal oxides, nitrides, carbon materials, and the like. Compared with metals, although the thermal conductivity of oxides is not high, the price is very low, and a large amount of them can be filled into polymers to achieve ideal thermal conductivity. There are more and more industries where thermally conductive plastics are applied, and the market demand for materials with excellent mechanical properties and high thermal conductivity is also increasing. Therefore, the development of new thermally conductive fillers and the exploration of different types of fillers should be highly valued for improving the thermal conductivity of composite material...

Claims

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Application Information

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IPC IPC(8): C01F5/02
CPCC01F5/02C01P2004/32C01P2004/60C01P2004/61C01P2006/10C01P2006/80C01P2006/82
Inventor 高念谭莹朱树峰
Owner 天津泽希矿产加工有限公司