Apparently, a primary particle, having a copulative and sometimes also a cumulative force

word_orig - apparently, a primary particle, having a copulative and sometimes also a cumulative force

The tungsten powder has an average primary particle diameter of 0.1-1 μm, and tungsten silicide is localized within 50 nm from the surface of each particle.

The average primary particle size of the inorganic microparticle ranges from 1 to 50 nm inclusive.

The hydrophobic layer can comprise fused polymer particles having an average primary particle diameter on the nanometer to micrometer scale.

The primary particle size of the second silica is 0.5-10 μm inclusive.

The hydrophobic layer can comprise fused polymer particles have an average primary particle diameter on the nanometer to micrometer scale.

The primary particle size of the first silica is 5-100 nm inclusive.

The titanium oxide fine particles are spherical and have an average primary particle diameter of 200 to 400 nm.

Said composite structure is a kind of structure formed between microcrystals in a primary particle and / or between primary particles.

The insoluble powder preferably has an average primary-particle diameter of 3 to 100 µm and an aspect ratio of from 3 to 250.

The precipitated calcium carbonate has a vaterite crystalline form, a primary particle size of about 0.2 µm to about 3 µm, and an aggregate particle size of less 5 than about 4 µm.

Each primary particle is covered with a carbonaceous coating film, and the carbonaceous coating film also lies between the primary particles.

Disclosed is a method for producing metal oxide particles having high crystallinity and a small primary particle diameter.

The obtained ultrafine silver particles have a mean primary particle diameter of 100nm or below and are excellent in dispersibility.