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- W2801305068 abstract "Abstract Lead‐free 0.955K 0.5 Na 0.5 Nb 1‐ z Ta z O 3 ‐0.045Bi 0.5 Na 0.5 ZrO 3 +0.4%MnO ceramics (abbreviated as KNNTa z ‐0.045BNZ+0.4Mn) were prepared by a conventional solid‐state sintering method in a reducing atmosphere (oxygen partial pressure of 1 × 10 −10 atm). All ceramics with a pure perovskite structure show the two‐phase coexistence zone composed of rhombohedral and tetragonal phase. Ta 5+ ions substitute for Nb 5+ ions on the B‐site, which results in a decrease in the R phase fraction in the two‐phase coexistence zone. The R‐T phase transition temperature moves to room temperature due to the substitution of Nb 5+ ions by Ta 5+ ions. A complex domain structure composed of small nano‐domains (~70 nm) formed inside large submicron domains (~200 nm) exists in KNNTa0.02‐0.045BNZ+0.4Mn ceramics, which can induce a strong dielectric‐diffused behavior and improve the piezoelectric properties. The temperature stability for the reverse piezoelectric constant for the KNNTa z ‐0.045BNZ+0.4Mn ceramics can be improved at z = 0.02. Excellent piezoelectric properties ( d 33 = 328 pC/N, and = 475 pm/V at E max = 20 kV/cm) were obtained for the KNNTa 0.02 ‐0.045BNZ+0.4Mn ceramics." @default.
- W2801305068 created "2018-05-17" @default.
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- W2801305068 date "2018-04-25" @default.
- W2801305068 modified "2023-10-10" @default.
- W2801305068 title "Improving piezoelectric properties and temperature stability for KNN‐based ceramics sintered in a reducing atmosphere" @default.
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- W2801305068 doi "https://doi.org/10.1111/jace.15584" @default.
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