Laminate

A technology of laminates and pressure, applied in the field of laminates, can solve the problems of the thermal conductivity of bonded laminates being reduced in the vertical direction

Inactive Publication Date: 2010-10-06
SGL CARBON SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also in the manufacture of laminates that are used to conduct, transfer or distribute heat, it is often necessary to use expensive thermally conductive adhesives because the low thermal conductivity of conventional adhesives makes the adhesive layer The thermal conductivity of the compact decreases significantly in the direction perpendicular to the bonding plane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] Dimensions will be 200 x 200 x 1mm 3 The density is 1.0g / cm 3 Graphite foil of the same size and a density of 1.8g / cm 3 The graphite foil is cleaned by wiping with a wipe (Tuch). Spread the surface-active mixture thinly on one side with a wipe to a density of 1.0 g / cm 3 on graphite foil. The mixture is an aqueous emulsion (solids content about 25% by weight) of methyl-hydrogen-polysiloxane and dimethyl-polysiloxane and a formulation of ethylated fatty alcohol and aromatic ether alcohol Composed of equal parts by volume. The coated surface was dried at 60°C for about 1 minute. Next, set the density to 1.0g / cm 3 The coated side of a graphite foil with a density of 1.8g / cm 3 The cleaned side of the graphite foil was matched and squeezed at a temperature of 180 °C for 60 minutes at a contact pressure of 3 MPa. This results in a composite body which cannot be detached without destroying the graphite foil.

example 2

[0034] Dimensions will be 150 x 150 x 1mm 3 The density is 1.8g / cm 3 Graphite foils were cleaned on both sides by wiping with a wipe, weighed, and thinly coated on one side with a mixture of methyl-hydrogen-polysiloxane and dimethyl-polysiloxane An aqueous emulsion (solids content about 25% by weight) was produced. Next, the coated surface was dried at 60° C. for 5 minutes and reweighed. According to the mass change, the coating amount of the interface active coating is about 0.5g / cm 2 . Another uncoated graphite foil and 9 coated graphite foils were placed on top of each other in such a way that the respective coated layer was in contact with the uncoated layer. The set of layers (Schichtpaket) was extruded in a die extruder at 200° C. for 180 minutes at a contact surface pressure of 5 MPa. The composite exhibits good adhesion and cannot be detached without destroying the graphite foil.

[0035] The thermal conductivity of the composite perpendicular to the bonding plan...

example 3

[0037] Pair has dimensions 100 x 50 x 0.5mm 3 Graphite foil (density 1.0g / cm 3 ) and extruded synthetic graphite (density 1.8g / cm 3 , the size is 100×50×5mm 3 ) for surface cleaning. The surface-active mixture was coated onto one side of a graphite foil and dried as described in Example 1. Finally, the graphite foil is placed with the coated side on a plate made of extruded synthetic graphite. Both materials were extruded in a forging die press at 200 °C for 90 min at 3 MPa. The composite is released only by breaking the graphite foil.

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Abstract

The invention relates to a laminate which comprises at least one layer of a compressible, graphitic material and at least one further layer of a compressible, graphitic material or a layer of a ceramic material and in which there is a permanent bond between the materials and the materials are joined by means of a surface-active, bonding substance from the group consisting of organosilicon compounds, metal soaps and perfluorinated compounds.

Description

technical field [0001] The invention relates to a laminate consisting of at least one layer of compressible graphite material and at least one other layer of compressible graphite material or ceramic material, and in said laminate between ceramic and graphite There is a non-releasable connection between them; and the invention relates to a method for making such a laminate. Background technique [0002] Laminates made of metal plates or sheets and laminates made of plates or foils produced by compacting vermicular graphite or expanded graphite are known (US 3,404,061; DE-OS 25 18 351; US ​​4,442,894; Firmenprospekt™ SIGRAFLEX der SGL Technologies GmbH). The laminates are used primarily as furnace fittings, radiation shields, flat seals for deposition plates in electrostatic precipitators, and for corrosion-resistant housings. [0003] In such laminates, the arrangement and sequence of the individual layers can be chosen largely freely and adapted to the intended applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/00B32B18/00
CPCC04B2237/363C04B2235/3206C04B2235/3201C04B2235/3284C04B2237/385C04B2237/38C04B2235/3293C04B2235/3232Y02E60/50C04B2235/3217C04B2235/3208C04B2235/608H01M8/0236H01M8/0234C04B2235/483C04B2235/9607C04B2235/449C04B37/008C04B2235/445C04B2237/365C04B2235/3241H01M8/0245C04B2235/3244
Inventor 梅尔廷·克里斯特奥斯温·奥廷格于尔根·巴赫尔维尔纳·朗格尔西尔维亚·梅西恩巴斯蒂安·胡德雷尔
Owner SGL CARBON SE
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