Production method for forsterite fine particles

Patent metadata

Field	Value
Publication number	US-2018244530-A1
Application number	US-201815962381-A
Country	US
Kind code	A1
Filing date	Apr 25, 2018
Priority date	Mar 25, 2014
Publication date	Aug 30, 2018
Grant date	—

Abstract

A method for producing forsterite microparticles having a primary particle size of 1, to 50 nm, as determined through electron microscopy. The method includes spray-drying, in an atmosphere of 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.

First claim

1 . A method for producing forsterite microparticles having a primary particle size of 1 to 50 nm, as determined through electron microscopy, the method comprising:
spray-drying, in an atmosphere of 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.

2 . The method according to claim 1 , wherein the water-soluble magnesium salt is an organic acid salt of magnesium.

3 . The method according to claim 2 , wherein the magnesium organic acid salt is at least one species selected from the group consisting of magnesium citrate, magnesium glycolate, magnesium malate, magnesium tartrate, magnesium lactate, magnesium malonate, magnesium succinate, and magnesium acetate.

4 . The according to claim 1 , wherein the forsterite microparticles have a primary particle size of 30 to 50 nm, as determined through electron microscopy.

5 . The method according to claim 2 , wherein the forsterite microparticles have a primary particle size of 30 to 50 nm, as determined through electron microscopy.

6 . The method according to claim 1 , wherein the colloidal silica has a primary particle size of 2 to 5 nm, as determined through electron microscopy.

7 . The method according to claim 2 , wherein the colloidal silica has a primary particle size of 2 to 5 nm, as determined through electron microscopy.

8 . The method according to claim 4 , wherein the colloidal silica has a primary particle size of 2 to 5 nm, as determined through electron microscopy.

Assignees

• Nissan Chemical Ind Ltd

Inventors

• Isaji Tadayuki
• Ogihara Takashi
• Kodera Takayuki

Classifications

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title

• C04B2235/3418

  Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint · CPC title

• C01P2004/62

  Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title

• C04B35/64

  Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F}) · CPC title

• C04B2235/449

  Organic acids, e.g. EDTA, citrate, acetate, oxalate · CPC title