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Effect of Grain Size on the Microwave Dielectric Characteristics of High‐Energy Ball‐Milled Zinc Magnesium Titanate Ceramics
Author(s) -
Roopas Kiran Sirugudu,
Sreenivasulu Gollapudi,
Murthy Vemuri Rama Krishna,
Subramanian Venkatachalam,
Murty Budaraju Srinivasa
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05128.x
Subject(s) - sintering , materials science , ball mill , dielectric , ceramic , grain size , temperature coefficient , microwave , magnesium , solid state reaction route , composite material , analytical chemistry (journal) , mineralogy , metallurgy , chemistry , physics , optoelectronics , quantum mechanics , chromatography
Using solid‐state reaction route and high‐energy ball milling technique Zn 1− x Mg x TiO 3 ( x = 0–0.5) compositions were synthesized. These ball milled samples were sintered at 1100°C for 2 h and microwave dielectric properties such as dielectric constant (ε’), quality factor ( Q ), and temperature coefficient of resonant frequency (τ f ) were studied. Significant improvement in quality factor of ~ 65% was observed for x = 0.3. To understand the effect of sintering duration on the microwave dielectric properties, single phase Zn 0.7 Mg 0.3 TiO 3 samples were sintered at 1100°C for different durations from 2 to 20 h. The grain size increases with sintering duration and it influences to enhance the microwave dielectric properties and as a result, the quality factor further improved by three times. The dielectric constant and temperature coefficient of resonant frequency showed a slight improvement of ~ 10%–15% with sintering duration.