Oxide Ceramic Laser
Abstract
Porosities as low as 0.000001 to 0.0000001 are attained in neodymuium-doped Yttralox (NDY) ceramics, provided that pore densities for large pores are low and that pore cluster formation is prevented during sintering. Large pores (about 50 micrometers) found in sintered material prepared from ball-milled powder originates from particles of mill-lining introduced into the powder batch during milling. The kinetics of removal of pores entrapped inside grains during the late stages of sintering are found to be related directly to the amount of grain growth. Grain growth during final stages of sintering of NDY material prepared from milled powder approximately follows as t to the 1/3 power behavior, whereas grain growth approximately follows a t to the 1/2 power law in unmilled material at 2000C.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 24, 1972
- Accession Number
- AD0746521
Entities
People
- Charles D. Greskovich
Organizations
- General Electric