Pyrophoric sheet

1. A pyrophoric sheet comprising oxidizable iron, non-combustible fibers, and a stiction-reducing coating, wherein the sheet has a water content of about 2% or less, by weight based on the total weight of the sheet, and wherein the oxidizable iron and the non-combustible fibers are dispersed within the sheet in an amount that is effective to heat the sheet to a temperature greater than 100° C. in less than 2 seconds upon exposure of the sheet to air.

2. The sheet according to claim 1 , wherein the oxidizable iron is in the form of iron-containing particles having a BET surface area of at least about 1 m 2 /g.

3. The sheet according to claim 1 , wherein the stiction-reducing coating comprises a dry lubricant.

4. The sheet according to claim 1 , wherein the stiction-reducing coating comprises a salt.

5. The sheet according to claim 1 , wherein the iron content of the sheet is at least about 20%.

6. The sheet according to claim 1 , wherein the thickness of the sheet is in the range of about 0.01 mm to about 0.5 mm.

7. The sheet according to claim 1 , wherein the sheet has a compression ratio of at least 1.2.

8. The sheet according to claim 1 , wherein the non-combustible fibers comprise at least one material selected from the group consisting of glass, ceramic, metal oxide, alumina, silica and metal.

9. The sheet according to claim 1 , wherein at least about 30% of the non-combustible fibers, by weight based on total fiber weight, are glass fibers having an aspect ratio of at least about 20 and a diameter in the range of about 0.1 micron to about 5 microns.

10. An air tight container comprising a stack of sheets according to claim 1 .