METHOD FOR THE PRODUCTION OF HIGHLY WEAR-RESISTANT CERAMIC MATERIAL

• US 3,871,891 A
• Filed: 12/14/1973
• Issued: 03/18/1975
• Est. Priority Date: 03/23/1973
• Status: Expired due to Term

• Current Assignee: Horst Nink, Karl-Heinz Schuller
• Original Assignee: Horst Nink, Karl-Heinz Schuller
• Inventors: Schuller, Karl-Heinz, Nink, Horst
• Primary Examiner(s): Poer, J.
• Application Number:
  US05/424,749
• Time in Patent Office: 459 Days
• Field of Search: 106/56,65,73.4 51/309
• US Class Current: 501/127
• CPC Class Codes: C04B 35/111 Fine ceramics
• CPC Class Codes: C04B 35/645 Pressure sintering

Abstract

A new method for the production of extremely wear-resistant aluminum oxide ceramic material, particularly Al2O3 in which at least 98% Al2O3 powder is mixed with 10-50 pph carbonaceous plasticizer, optionally pressed into a blank, heated to 1,280*1,500* C., sintered for at least 5 minutes at the highest temperature, and then cooled is described.

Claims

1. METHOD FOR THE PRODUCTION OF HIGHLY WEAR-RESISTANT BODIES OF AL2O3 CERAMIC MATERIAL, CHARACTERIZED BY THE SUCCESSION OF THE FOLLOWING OPERATING STEPS:

A. PREPARING A MIXTURE CONSISTING OF 100 PARTS BY WEIGHT OF

2. Method according to claim 1 wherein polyvinyl alcohol is the carbonaceous plasticizer.

3. Method according to claim 1 wherein 100% Al203 powder is used.

4. Method according to claim 1 wherein the mixture of step (a) is pressed into a blank.

5. Method according to claim 4 wherein the pressure is applied before the maximum temperature has been attained.

6. Method according to claim 4 wherein the pressure is applied when about the maximum temperature has been attained.

7. Dense, ceramic aluminum oxide body, produced according to claim 1.