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Spherical forsterite particles, method for producing same, and resin composition including spherical forsterite particles

A resin composition and forsterite technology, applied in the direction of dyeing organosilicon compound treatment, magnesium silicate, fibrous fillers, etc., can solve the problems of increased transmission loss, etc., and achieve the effect of good high-frequency characteristics and high crystallinity

Pending Publication Date: 2021-07-23
NISSAN CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Higher frequency increases signal transmission speed, but transmission loss also increases

Method used

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  • Spherical forsterite particles, method for producing same, and resin composition including spherical forsterite particles
  • Spherical forsterite particles, method for producing same, and resin composition including spherical forsterite particles
  • Spherical forsterite particles, method for producing same, and resin composition including spherical forsterite particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0129] (Evaluation method)

[0130] ·Determination of average particle size

[0131] Measured by a laser diffraction particle size distribution meter, trade name MASTERSIZER 2000 (manufactured by Malvern).

[0132] ·Determination of dielectric loss tangent

[0133]Using cavity resonator jigs for measurement frequencies of 1 GHz and 10 GHz (manufactured by Kicom Co., Ltd.), a PTFE sample tube (length 30 mm, inner diameter 3 mm (for 1 GHz), 1 mm (for 10 GHz)) is filled with a powder sample , measured by a vector network analyzer product name FieldFoxN6626A (manufactured by KEYSIGHT TECHNOLOGIES).

[0134] ·Determination of specific surface area based on BET method

[0135] Using the BET method-based surface area measuring device product name Monosorb (manufactured by Quantachrome Instruments), it was measured by the one-point method (relative pressure 0.3) using the BET method. In addition, the average primary particle size is calculated by (3 / (3.2(g / cm 3 ) × specific surfa...

manufacture example 1

[0144] As a step (A), basic magnesium carbonate powder (manufactured by Kamijima Chemical Co., Ltd.) and silica sol (trade name Snowtex XS, manufactured by Nissan Chemical Co., Ltd.) were prepared in a molar ratio of MgO:SiO 2 = 2:1 mixing / drying, the dried product was pulverized with a shredder, and fired at 1200° C. for 2 hours in an electric furnace to prepare a forsterite powder.

[0145] The powder obtained above was further pulverized by a dry jet mill at a pressure of 0.64 MPa to prepare pulverized forsterite powder (average particle diameter: 2.3 μm).

[0146] (Synthesis of spherical forsterite powder)

Embodiment 1

[0148] As a step (B), the pulverized forsterite powder prepared in Production Example 1 was charged at a supply rate of 7.5 kg / h into an oxygen burner that used propane gas as fuel and set the combustion amount to 120,000 kcal. In the flame (theoretical temperature: 3000 ℃) to carry out thermal spraying treatment, the spherical thermal spraying treatment of forsterite powder was obtained in the recovery part of the cyclone separator. As the (C) step, the powder obtained in the (B) step was fired at 700° C. for 2 hours in an electric furnace to prepare a forsterite powder.

[0149] The powder obtained by firing maintained a spherical shape, had an average particle diameter of 5.9 μm, and a dielectric loss tangent of 0.0015 at a measurement frequency of 1 GHz, and 0.0017 at a measurement frequency of 10 GHz.

[0150] In addition, the average primary particle size (particle size by BET method) calculated from the specific surface area by the BET method was 2.4 μm, and the spheric...

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Abstract

[Problem] To produce forsterite having a low dielectric loss tangent and a spherical particle shape, and to provide a substrate having improved high-frequency characteristics. [Solution] Forsterite particles having an average particle size of 0.1-10 microns and a dielectric loss tangent of 0.0003-0.0025. Sphericity = (average particle size by laser diffraction grain size distribution analyzer: micron) / (average primary particle size based on specific surface area conversion using the nitrogen gas adsorption method: micron) is 1.0-3.3. A method for producing forsterite particles, the method including step (A): a step for mixing a magnesium compound serving as a magnesium source and a silicon compound serving as a silicon source so that the magnesium and silicon have an MgO / SiO2 molar ratio of 1.90-2.10 to prepare forsterite particles, step (B): a step for injecting the forsterite particles prepared in step (A) into a hydrocarbon combustion flame and recovering forsterite particles, and step (C): a step for firing the forsterite particles obtained in step (B) at 700-1100 DEG C. The proportion of resin and forsterite particles is 1:0.001-1000 by mass ratio.

Description

technical field [0001] It relates to spherical forsterite particles, a method for producing the same, and a resin composition containing spherical forsterite particles. Background technique [0002] Communication technology using microwaves requires large-capacity, high-speed data communication due to high frequency. For mobile phones, etc., the frequency is increasing from the communication standard 4G (3GHz to 4GHz) to 5G (28GHz). In addition, among automobiles equipped with an automatic driving device, there are more and more automobiles equipped with millimeter-wave radars with a frequency of about 24 GHz to 76 GHz as radars for recognizing surrounding obstacles, for example, in recent years. [0003] Resin is used for insulation between wirings of a printed circuit board (PCB: printed circuit board) after mounting components. In order to improve the insulation of the resin, it is required to contain a material that is consistent with the thermal expansion coefficient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/22C08L101/00C08K3/34
CPCC08K3/34C08L101/00C01B33/22C09C1/28C01P2004/32C09C3/12C08K9/06C08K2201/005C01P2004/61C01P2004/62C01P2006/40C09C1/3081
Inventor 飞田将大山田修平
Owner NISSAN CHEM CORP