Patent ID: 11891307
Assignee: JGC CATALYSTS AND CHEMICALS LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  H | IPC C  H

Claim 10:
11. A silica-based particle group including irregularly shaped silica-based particles and non-irregularly shaped silica-based particles,
each of the irregularly shaped silica-based particles having a core including a plurality of pores in its interior and a coating silica layer covering the core, the silica-based particle group satisfying [1] to [3] described below:
[1] a weight-average particle size (D1) is 100 to 600 nm, and a particle size in terms of specific surface area (D2) is 30 to 300 nm;
[2] a degree of shape irregularity D (D=D1/D3) as expressed by a ratio of the weight-average particle size (D1) to a projected area equivalent particle size (D3) is 1.1 to 5.0; and
[3] a multi-peak distribution in which three or more separation peaks are detected is obtained by waveform separation of a volume-based particle size distribution.