ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Thermal schedules for sintering ZrO2- and SnO2-doped Ba2Ti9O20 resonators to minimum porosity were developed using a shrinkage-rate-controlled dilatometer. Efficient sintering schedules were formulated that circumvented pore formation via grain-boundary/triple-point liquid-phase volatilization. A densification rate (0.5%/min) for the early stages of sintering, which minimized intragranular porosity, was chosen. For the later stages of sintering, a densification rate (0.01%/min) that minimized specimen slumping via the liquid phase permitted sintering to high density. These schedules were successfully upscaled to heat treatment in a conventional furnace. The dielectric constants, quality factors, and selected temperature coefficients of 0.82- and 1.64-mol%-SnO2-, and 1.64-mol%-ZrO2-doped monophase Ba2Ti9O20 were reported.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1551-2916.1999.tb20065.x
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