Calcium silicate insulation structure
AssigneeMartin Marietta Energy Systems, Inc.
InventorsThomas G. Kollie, Robert J. Lauf
Life of this patent
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Abstract
An insulative structure including a powder-filled evacuated casing utilizes a quantity of finely divided synthetic calcium silicate having a relatively high surface area. The resultant structure-provides superior thermal insulating characteristics over a broad temperature range and is particularly well-suited as a panel for a refrigerator or freezer or the insulative barrier for a cooler or a insulated bottle.
Claims20
An insulation structure comprising:
- means defining an enclosure having an interior which has been substantially evacuated of gas and has walls which provide low permeation of ambient gases into the interior of the structure;
- and
- a quantity of dried, finely divided synthetic calcium silicate contained within the enclosure interior wherein the calcium silicate is produced by a reaction of diatomaceous earth and lime and wherein the surface area of the powder is relatively high and at least about 120 square meters per gram.
The structure as defined in claim I further comprising a quantity of an opacifier mixed with the quantity of calcium silicate.
An insulation structure comprising:
- enclosure means including two opposing walls joined together so as to provide an enclosure interior therebetween and which provide low permeation of ambient gases into the enclosure interior;
- a quantity of dried finely divided synthetic calcium silicate positioned within so as to finely the enclosure interior and wherein the calcium silicate is produced by a reaction of diatomaceous earth and lime and has a relatively high surface area of at least about 120 square meters per gram;
- and
- the enclosure interior is substantially evacuated of gas.
An insulation structure comprising:
- a quantity of finely divided, relatively dry synthetic calcium silicate which is produced by a reaction of diatomaceous earth and lime and has a relatively high surface area of at least about 120 square meters per gram;
- envelope means enveloping the quantity of calcium silicate and including walls which permit the passage of air and moisture therethrough but prevent the passage of the calcium silicate therethrough;
- and
- means defining an enclosure having an interior within which the calciumsilicate-containing envelope means is positioned and which has been substantially evacuated of gas and which includes walls which provide low permeation of ambient gases into the interior of the enclosure means.
Dependencies are inferred from the claim text.