Rate-controlled sintering of nano-sized BaTiO3

Katherine S. Meyers; Manu Srivastava; Robert F. Speyer

doi:10.1117/12.316961

21 July 1998 Rate-controlled sintering of nano-sized BaTiO₃

Katherine S. Meyers, Manu Srivastava, Robert F. Speyer

Proceedings Volume 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials; (1998) https://doi.org/10.1117/12.316961
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

Rate controlled sintering (RCS) was applied to nano-sized BaTiO₃ powder compacts. The starting average particle size was measured to be 270 nm. Resulting microstructures were compared to those from constant heating rate sintering (TCS). Specimens were heat treated under a series TCS and RCS schedules until reaching 1350 degrees C. Grain sizes and porosities were compared using digital analyses of SEM microstructures. The more rapid TCS and RCS rates resulted in smaller average grain sizes and greater volume percentages of porosity. Specimens were also sintered under a constant RCS rate to successive degrees of densification. A dramatic increase in average grain size was observed between shrinkage of 18.7 percent, and 19.1 percent. This excessive grain growth was attributed to the final stages of RCS heat-treatment where specimens were exposed to elevated temperatures in the range of 1250-1350 degrees C. These immoderate temperatures resulted from the RCS control algorithm's response to the specimens having reached near or complete termination of densification where they could not follow a rapid setpoint densification rate.

Citation Download Citation

Katherine S. Meyers, Manu Srivastava, and Robert F. Speyer "Rate-controlled sintering of nano-sized BaTiO₃", Proc. SPIE 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (21 July 1998); https://doi.org/10.1117/12.316961

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available