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Title: High temperature structural insulating material

Abstract

A high temperature structural insulating material useful as a liner for cylinders of high temperature engines through the favorable combination of high service temperature (above about 800.degree. C.), low thermal conductivity (below about 0.2 W/m.degree. C.), and high compressive strength (above about 250 psi). The insulating material is produced by selecting hollow ceramic beads with a softening temperature above about 800.degree. C., a diameter within the range of 20-200 .mu.m, and a wall thickness in the range of about 2-4 .mu.m; compacting the beads and a compatible silicate binder composition under pressure and sintering conditions to provide the desired structural form with the structure having a closed-cell, compact array of bonded beads.

Inventors:
 [1]
  1. (Munster, IN)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
875190
Patent Number(s):
US H200
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
temperature; structural; insulating; material; useful; liner; cylinders; engines; favorable; combination; service; 800; degree; thermal; conductivity; below; compressive; strength; 250; psi; produced; selecting; hollow; ceramic; beads; softening; diameter; range; 20-200; wall; thickness; 2-4; compacting; compatible; silicate; binder; composition; pressure; sintering; conditions; provide; desired; form; structure; closed-cell; compact; array; bonded; ceramic beads; material useful; softening temperature; compressive strength; wall thickness; insulating material; thermal conductivity; temperature structural; hollow ceramic; selecting hollow; structural insulating; compact array; service temperature; temperature engine; structural form; /428/264/501/

Citation Formats

Chen, Wayne Y. High temperature structural insulating material. United States: N. p., 1987. Web.
Chen, Wayne Y. High temperature structural insulating material. United States.
Chen, Wayne Y. 1987. "High temperature structural insulating material". United States. doi:. https://www.osti.gov/servlets/purl/875190.
@article{osti_875190,
title = {High temperature structural insulating material},
author = {Chen, Wayne Y.},
abstractNote = {A high temperature structural insulating material useful as a liner for cylinders of high temperature engines through the favorable combination of high service temperature (above about 800.degree. C.), low thermal conductivity (below about 0.2 W/m.degree. C.), and high compressive strength (above about 250 psi). The insulating material is produced by selecting hollow ceramic beads with a softening temperature above about 800.degree. C., a diameter within the range of 20-200 .mu.m, and a wall thickness in the range of about 2-4 .mu.m; compacting the beads and a compatible silicate binder composition under pressure and sintering conditions to provide the desired structural form with the structure having a closed-cell, compact array of bonded beads.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1987,
month = 1
}

Patent:

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  • A high temperature structural insulating material useful as a liner for cylinders of high temperature engines through the favorable combination of high service temperature (above about 800.degree. C.), low thermal conductivity (below about 0.2 W/m.degree. C.), and high compressive strength (above about 250 psi). The insulating material is produced by selecting hollow ceramic beads with a softening temperature above about 800.degree. C., a diameter within the range of 20-200 .mu.m, and a wall thickness in the range of about 2-4 .mu.m; compacting the beads and a compatible silicate binder composition under pressure and sintering conditions to provide the desired structuralmore » form with the structure having a closed-cell, compact array of bonded beads.« less
  • A high temperature structural insulating material useful as a liner for cylinders of high temperature engines through the favorable combination of high service temperature (above about 800/sup 0/C), low thermal conductivity (below about 0.2 W/m/sup 0/C), and high compressive strength (above about 250 psi). The insulating material is produced by selecting hollow ceramic beads with a softening temperature above about 800/sup 0/C, a diameter within the range of 20-200 ..mu..m, and a wall thickness in the range of about 2 to 4 ..mu..m; compacting the beads and a compatible silicate binder composition under pressure and sintering conditions to provide themore » desired structural form with the structure having a closed-cell, compact array of bonded beads.« less
  • High-temperature insulating bodies are made by granulating cork, compressing and heating to bind and cure the cork granules, and thereafter carbonizing the bound and cured granules. The carbonized material, if desired, may be graphitized.
  • A heat insulating structure is described that has a heat-resistant tube disposed in a tubular cylindrical body and defining a passage for a high temperature gas, a heat insulating material disposed between the tube and the tubular cylindrical body and adapted to prevent the heat possessed by the gas from being transmitted to the tubular cylindrical body, and a spring adapted to bias the heat insulating material toward the inner surface of the tubular cylindrical body, so as to prevent the formation of a bypass passage for the gas including the gap between the tubular cylindrical body and the heatmore » insulating material. The heat insulating material consists of a plurality of fibrous heat insulating materials mainly consisting of bulky fibrous materials and a plurality of shaped fibrous heat insulating materials. These fibrous heat insulating materials and the shaped fibrous heat insulating materials are arranged alternatingly and independently in the axial direction. In each of the bulky fibrous heat insulating material, disposed is a spring for biasing the shaped fibrous heat insulating material in the axial direction.« less