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Spherical magnesium oxide, method for producing same, heat-conductive filler, and resin composition

A technology of magnesium oxide and thermal conductivity, applied in magnesium oxide and other directions, can solve the problems of resin moldability, insufficient fluidity of resin composition, etc., and achieve the effect of high sphericity

Pending Publication Date: 2021-12-31
TATEHO CHEM IND CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, although the moisture resistance and fillability of the spherical magnesium oxide obtained by the above method are improved, when filled in resin, the flow of the resin composition during kneading Insufficient properties, resin moldability problems

Method used

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  • Spherical magnesium oxide, method for producing same, heat-conductive filler, and resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0060] The present invention is illustrated in detail by the following examples, but these examples do not limit the present invention in any sense.

[0061]

[0062] (1) Determination method of element content

[0063] The determination of the element content was carried out by ICP emission spectroscopic analysis. The measurement sample was added to 12N hydrochloric acid (special grade reagent) and heated to completely dissolve it, and then the content of each element was measured using an ICP measurement device (PS3520 VDD, manufactured by Hitachi High-Technologies). It should be noted that in Table 1 below, when the content of lithium is lower than the detection limit, it is represented as <1 ppm as a trace amount.

[0064] (2) Determination method of BET specific surface area

[0065] The BET specific surface area was measured by a gas adsorption method (BET method) using nitrogen gas using a specific surface area measuring device (Macsorb, manufactured by Mountech Co....

Embodiment 2

[0079] Spherical magnesium oxide was obtained by the same method as in Example 1 except that the conditions of the spray drying method were set at a rotational speed of 6000 ppm.

Embodiment 3

[0081] Except adding lithium carbonate (manufactured by Kanto Chemical Co., Ltd., deer special grade) so that the lithium content in the finally obtained spherical magnesium oxide is 10ppm, and the spray drying condition is set at a rotation speed of 6000ppm, spherical magnesium oxide is obtained by the same method as in Example 1. magnesium.

[0082]

[0083] Lithium carbonate (manufactured by Kanto Chemical Co., Ltd., deer special grade) was added so that the lithium content in the finally obtained spherical magnesium oxide was 18 ppm, and iron (II) oxide (manufactured by Hayashi Junyaku Kogyo Co., Ltd.) was added so that the iron content was 800 ppm. , chemical use), magnesium oxide particles were obtained by the same method as in Example 1.

[0084]

[0085] Lithium carbonate (manufactured by Kanto Chemical Co., Ltd., deer special grade) was added so that the lithium content in the finally obtained spherical magnesium oxide was 25 ppm, and iron (II) oxide (manufactured...

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Abstract

The purpose of the present invention is to provide: spherical magnesium oxide having high sphericity, exceptional moisture resistance, and exceptional fluidity in a resin composition when a resin is filled therewith. The present invention is a spherical magnesium oxide characterized by containing 300-2000 ppm of boron, by the content of lithium being less than 15 ppm, and by the sphericity read from an SEM photograph in a volume-based cumulative 50% particle diameter (D50) range of 3-200 mum by laser diffraction scattering particle size distribution measurement being 1.00-1.20.

Description

technical field [0001] The present invention relates to spherical magnesia having a high degree of sphericity, moisture resistance, and excellent fluidity of a resin composition when filled in a resin, a method for producing the same, a thermally conductive filler containing the spherical magnesia, and a resin composition containing the same. Background technique [0002] In recent years, due to the high integration, high power, and high speed of various electronic devices, the performance required for insulating heat-dissipating fillers has further improved. Conventionally, silica, alumina, aluminum nitride, and the like have been widely used as thermally conductive fillers. However, although silicon dioxide is cheap, it has low thermal conductivity, insufficient heat dissipation to cope with the increase in the amount of heat generated in recent years, and problems such as stable operation when used in semiconductor applications. On the other hand, alumina has higher ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/08C08K7/18C08L101/00C08K3/22
CPCC08K7/18C01F5/08C08L101/00C08K2003/222C08K2201/003C08K2201/005C08K2201/006C01P2004/61C01P2002/52C01P2002/54C01P2004/51C01P2004/32C01P2006/12C01P2006/32C01P2004/03C08L23/0869C08K3/22C01P2002/70
Inventor 大崎善久近泽智文塘启祐
Owner TATEHO CHEM IND CO