Microstructure and electrical properties of K0.5Na0.5NbO3 lead-free piezoelectric ceramics sintered in low pO2 atmosphere
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DOI: 10.1007/s10854-018-0030-0
Abstract: Pure K0.5Na0.5NbO3 lead-free piezoelectric ceramics without any dopants/additives were sintered at various temperatures (950–1125 °C) in low pO2 atmosphere (pO2 ~ 10−6 atm). All ceramics exhibit high relative densities (> 94%) and low weight loss ( read more here.
Keywords: po2; po2 atmosphere; 5na0 5nbo3; ceramics sintered ... See more keywords
Highly resistive SiC ceramics sintered with Al2O3-AlN-Y2O3 additions
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DOI: 10.1016/j.ceramint.2017.01.058
Abstract: Abstract A polycrystalline SiC ceramic prepared by pressureless sintering of α-SiC powders with 3 vol% Al 2 O 3 -AlN-Y 2 O 3 additives in an argon atmosphere exhibited a high electrical resistivity of ~10 13… read more here.
Keywords: sic ceramics; resistive sic; microscopy; highly resistive ... See more keywords
Influence of sintering method on the PTCR effect and microstructures of Sm2O3-doped BaTiO3-based ceramics sintered in a reducing atmosphere
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DOI: 10.1016/j.ceramint.2017.05.246
Abstract: Abstract This study investigated the effects of sintering temperature and cooling rates on the positive temperature coefficient of resistance (PTCR) effect and microstructures of Ba 1.022 – x Sm x TiO 3 (BST) ceramics sintered… read more here.
Keywords: reducing atmosphere; temperature; effect microstructures; ceramics sintered ... See more keywords
The effect of microstructure on piezoelectric properties and temperature stability for MnO doped KNN-based ceramics sintered in different atmospheres
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DOI: 10.1016/j.jallcom.2018.04.138
Abstract: Abstract Lead-free 0.4% MnO doped 0.955K0.5Na0.5NbO3-0.045Bi0.5Na0.5ZrO3 (Abbreviated as 0.955KNN-0.045BNZ) ceramics were prepared by a conventional solid-state sintering method in both ambient air and reducing atmosphere (H2/N2/H2O, oxygen partial pressure p o 2 = 1 × 10−10 atm). All samples… read more here.
Keywords: reducing atmosphere; mno doped; piezoelectric properties; air ... See more keywords