Title :
PLZT-a dielectric for high-temperature application
Author :
Hofmaier, Reginald L. ; Maher, Galeb H. ; Shirn, George A.
Author_Institution :
Sprague Electr. Co., Wichita Falls, TX, USA
Abstract :
Results of tests performed in the temperature range of 150 degrees C to 240 degrees C on 0.1- mu F capacitors made with a lanthanum-modified lead zirconate titanate (PLZT) dielectric are presented. Tests performed include life testing, variation of capacitance and dissipation factor with temperature, variation of capacitance with DC voltage, and steady-state leakage current measurements. These tests were also performed on multilayer ceramic capacitors made with various barium titanate (BaTiO/sub 3/) dielectrics and the results were compared to those obtained with the PLZT dielectric. While the multilayer ceramic capacitors made with the BaTiO/sub 3/ and PLZT dielectrics are both capable of withstanding the rigors of continuous operation at 150 degrees C to 200 degrees C, the capacitors made with the PLZT dielectric have superior electrical characteristics at these temperatures.<>
Keywords :
capacitors; ferroelectric materials; lanthanum compounds; lead compounds; titanium compounds; zirconium compounds; 0.1 muF; 150 to 240 C; BaTiO/sub 3/; DC voltage; PLZT; PbLaZrO3TiO3; dielectric; dissipation factor; high-temperature application; leakage current measurements; life testing; multilayer ceramic capacitors; temperature range; variation of capacitance; Capacitance; Capacitors; Ceramics; Dielectrics; Life testing; Nonhomogeneous media; Performance evaluation; Temperature distribution; Titanium compounds; Voltage;
Conference_Titel :
Electronics Components Conference, 1988., Proceedings of the 38th
Conference_Location :
Los Angeles, CA, USA
DOI :
10.1109/ECC.1988.12578
