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Table 1 Parameters of EPR signals observed in the initial and annealed SiO2:C samples at 292 K

From: Infrared, Raman and Magnetic Resonance Spectroscopic Study of SiO2:C Nanopowders

T ann

Paramagnetic center

g-factor

N, spins/cm3

Initial

SiDB

2.0055(3)

~1.5 · 1017

CRD

2.0033(3)

~2.5 · 1017

500 °C

O-centered CRD

2.0042(3)

~3.3 · 1018

700 °C

C-centered CRD with a nearby O heteroatom

2.0035(3)

~4.1 · 1022

800 °C

2.0035(3)

~4.2 · 1021

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