Silver powder, method for producing same, and hydrophilic conductive paste
A silver powder, wherein the silver powder satisfies D 50 -IPA>D 50 -W, where in measurement of a volume-based particle size distribution of the silver powder by a laser diffraction particle size distribution analysis, D 50 -IPA (μm) is a cumulative 50% point of particle diameter of the silver powder when isopropyl alcohol (IPA) is used as a measurement solvent for dispersing the silver powder, and D 50 -W (μm) is a cumulative 50% point of particle diameter of the silver powder when water is used as a measurement solvent for dispersing the silver powder, and wherein a phosphorus content in the silver powder is 0.01% by mass or more but 0.3% by mass or less.
1. A silver powder,
wherein the silver powder satisfies D 50 -IPA>D 50 -W, where in measurement of a volume-based particle size distribution of the silver powder by a laser diffraction particle size distribution analysis, D 50 -IPA (μm) is a cumulative 50% point of particle diameter of the silver powder when isopropyl alcohol (IPA) is used as a measurement solvent for dispersing the silver powder, and D 50 -W (μm) is a cumulative 50% point of particle diameter of the silver powder when water is used as a measurement solvent for dispersing the silver powder, and
wherein the silver powder contains a phosphorus-containing compound on a surface of the silver powder, wherein the phosphorus-compound is phytic acid, and
wherein a phosphorus content in the silver powder is 0.01% by mass or more but 0.3% by mass or less.
2. The silver powder according to claim 1 , wherein the cumulative 50% point of particle diameter D 50 of the silver powder is 0.1 μm or more but 5 μm or less and a BET specific surface area of the silver powder is 0.1 m 2 /g or more but 5 m 2 /g or less.
3. A hydrophilic conductive paste, comprising:
the silver powder according to claim 1 .
4. A hydrophilic conductive paste, comprising:
the silver powder according to claim 1 ;
a resin; and
a solvent,
wherein the solvent is water.
5. A silver powder, comprising:
phytic acid on a surface of the silver powder.
6. A hydrophilic conductive paste, comprising:
the silver powder according to claim 5 .
7. A hydrophilic conductive paste, comprising:
the silver powder according to claim 5 ;
a resin; and
a solvent,
wherein the solvent is water.