Method of manufacturing a ceramic article

  • US 4,271,109 A
  • Filed: 08/16/1977
  • Issued: 06/02/1981
  • Est. Priority Date: 04/25/1973
  • Status: Expired due to Term
First Claim
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1. The method of manufacturing a dense impervious ceramic article of predetermined configuration and dimensions, which method comprises:

  • mixing (a) from about 25% to 45% by weight of ball clay, (b) from about 10% to 25% by weight of wollastonite, (c) from about 25% to 45% by weight of a pulverized scrap glass which is selected from the group consisting of lime glass, lead glass, and soda-lime silicate glass, and (d) from 0% to about 5% by weight of bentonite to provide a finely divided raw-mix composition that consists essentially of said materials,placing a measured quantity of said raw-mix composition in a mold and subjecting it to a pressure within a range of from about 1,000 to 7,000 pounds per square inch to form a compact,removing said compact from the mold and heating it to a temperature above 800°

    C. but not exceeding about 1050°

    C., andmaintaining the compact at said temperature for a period of from 10 minutes to one hour to convert the compact into a hardened ceramic body.

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