One or more, two or more, three or more, four or more, five or more or six or more of these requirements may be met in the present invention.
In some embodiments, requirement (a) is met. In some embodiments requirement (b) is met. In some embodiments, requirement (c) is met. In some embodiments, requirement (d) is met. In some embodiments, requirement (e) is met. In some embodiments, requirement (f) is met. In some embodiments, requirement (g) is met.
Any combination of these requirements may be met in embodiments of the invention.
Regarding requirement (a), D10 is 0.41 μm or lower, for example 0.4 μm or lower, 0.39 μm or lower, 0.35 μm or lower, 0.32 μm or lower, 0.3 μm or lower, 0.28 μm or lower, 0.25 μm or lower or 0.24 μm or lower.
The value of D10 is preferably 0.4 μm or lower.
Typically, the D10 particle size may be at least 0.1 μm, at least 0.12 μm, at least 0.14 μm, at least 0.17 μm or at least 0.2 μm.
Accordingly, in some embodiments D10 is within the range 0.2 μm≤D10≤0.4 μm.
Regarding requirement (b), the D50 of the inorganic particle mixture is preferably less than or equal to 1.6 μm. The D50 may be 1.55 μm or lower, 1.5 μm or lower, 1.45 μm or lower, 1.4 μm or lower, 1.35 μm or lower, 1.3 μm or lower, 1.25 μm or lower, 1.2 μm or lower, 1.15 μm or lower, 1.1 μm or lower, 1.05 μm or lower, 1 μm or lower or 0.95 μm or lower.