Li/Ce/La Multidoping on Crystal Structure and Electric Properties of CaBi2Nb2O9 Piezoceramics

Xiang-Xiong ZENG; Jin-Chao YANG; Lian ZUO; Ben-Ben YANG; Jun QIN; Zhi-Hang PENG

doi:10.15541/jim20180225

Journals >Journal of Inorganic Materials >Volume 34 >Issue 4 >Page 379 > Article

Journal of Inorganic Materials
Vol. 34, Issue 4, 379 (2019)

Li/Ce/La Multidoping on Crystal Structure and Electric Properties of CaBi₂Nb₂O₉ Piezoceramics

Xiang-Xiong ZENG¹, Jin-Chao YANG¹, Lian ZUO¹, Ben-Ben YANG¹, Jun QIN¹, and Zhi-Hang PENG²

Author Affiliations

¹Northwest Institute of Nuclear Technology, Xi’an 710024, China;

²Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China

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DOI: 10.15541/jim20180225 Cite this Article

Xiang-Xiong ZENG, Jin-Chao YANG, Lian ZUO, Ben-Ben YANG, Jun QIN, Zhi-Hang PENG. Li/Ce/La Multidoping on Crystal Structure and Electric Properties of CaBi₂Nb₂O₉ Piezoceramics[J]. Journal of Inorganic Materials, 2019, 34(4): 379 Copy Citation Text

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1. (a) XRD patterns and (b, c) expanded XRD patterns of CBNLCL-100x ceramics

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2. Doping content dependencies of (a) lattice parameters and (b) value of a/b and volume of the CBNLCL-100x ceramics

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3. Raman spectra of the CBNLCL-100x samples at room temperature with insets showing regionally enlarged spectra

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4. Fitting curves of Raman spectra of CBNLCL-100x ceramicsBlack line is the measured spectra, red line is the fitted spectra and blue lines are the deconvoluted Lorentzian peaks (Please refer it in Web Edition)

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5. The a-c projections of crystal structure of (a) CBNLCL- 5 and (b) CBNLCL-17

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6. The b-c projections of crystal structure of (a) CBNLCL-5 and (b) CBNLCL-17

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7. Compositional dependence of the A-O1 length (a) along a and (b) b axis

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8. SEM images of (a) CBNLCL-5, (b) CBNLCL-10, (c) CBNLCL-12, (d) CBNLCL-15, (e) CBNLCL-17 ceramics

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9. (a) Grain sizes and (b) relative density of CBNLCL-100x ceramics

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10. Temperature dependence of (a) dielectric constant ε_rand (b) dielectric loss tanδ of CBNLCL-100x ceramics

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11. Piezoelectric coefficient d₃₃ values at room temperature of CBNLCL-100x ceramics

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12. Annealing temperature dependence of piezoelectric coefficient (d₃₃) of CBNLCL-100x ceramics

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	CBN	CBNLCL-5	CBNLCL-10	CBNLCL-12	CBNLCL-15	CBNLCL-17
Space group	A2₁am	A2₁am	A2₁am	A2₁am	A2₁am	A2₁am
R_p/%	6.31	7.25	4.86	5.16	4.72	5.01
R_wp/%	8.62	9.57	6.35	6.76	6.04	6.66
R_exp/%	4.77	5.26	5.38	5.15	5.37	5.34
Chi2	3.26	3.31	1.39	1.72	1.26	1.56
a/nm	0.54778(3)	0.54802(2)	0.54778(2)	0.54761(2)	0.54725(2)	0.54704(2)
b/nm	0.54355(3)	0.54372(2)	0.54379(2)	0.54378(2)	0.54396(2)	0.54390(2)
c/nm	2.48626(8)	2.48738(7)	2.48689(6)	2.48641(7)	2.48581(8)	2.48495(7)
V/nm³	0.740273(5)	0.741164(4)	0.740778(4)	0.742398(4)	0.739980(5)	0.739362(4)
a/b	1.00778	1.00790	1.00734	1.00706	1.00606	1.00577
Occupancy of Bi³⁺ at A site	0.108	0.116	0.106	0.108	0.092	0.094

Table 1. Crystal data and structure refinement results for CBNLCL-100x ceramics

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Bond type	CBN	CBNLCL-5	CBNLCL-10	CBNLCL-12	CBNLCL-15	CBNLCL-17
Nb—O
Nb—O1—Nb/(°)	158.47	151.84	153.94	152.96	158.99	152.68
O1—Nb—O2/(°)	174.11	172.79	172.99	171.85	171.33	171.81
Nb—O1/nm	0.2120	0.2159	0.2148	0.2143	0.2127	0.2151
Nb—O2/nm	0.2047	0.1888	0.1817	0.1836	0.1804	0.1805
Nb—O4 (1)/nm	0.1938	0.1846	0.1854	0.1848	0.1897	0.1872
Nb—O4 (2)/nm	0.2066	0.2180	0.2174	0.2162	0.2146	0.2127
Nb—O5 (1)/nm	0.1837	0.1968	0.1956	0.1945	0.1943	0.1955
Nb—O5 (2)/nm	0.2135	0.1979	0.1971	0.1997	0.1968	0.2002
Ca1/Bi1/Li/Ce/La—O (A—O)
A—O1(1ong bond along a axis)/nm	0.3191	0.3424	0.3233	0.3250	0.3123	0.3167
A—O1(short bond along a axis)/nm	0.2312	0.2058	0.2291	0.2277	0.2382	0.2364
A—O1(short bond along b axis)/nm	0.2365	0.2627	0.2323	0.2337	0.2315	0.2267
A—O1(1ong bond along b axis)/nm	0.3143	0.2980	0.3199	0.3191	0.3176	0.3235
A—O4 (1)/nm	0.2604×2	0.2539×2	0.2532×2	0.2546×2	0.2573×2	0.2526×2
A—O4 (2)/nm	0.2605×2	0.2549×2	0.2567×2	0.2557×2	0.2584×2	0.2585×2
A—O5 (1)/nm	0.2305×2	0.3208×2	0.3226×2	0.3269×2	0.3235×2	0.3257×2
A—O5 (2)/nm	0.2380×2	0.2422×2	0.2466×2	0.2486×2	0.2448×2	0.2477×2
Bi2/Ca2—O
Bi2/Ca2—O2 (1)/nm	0.2660	0.2553	0.2574	0.2516	0.2587	0.2599
Bi2/Ca2—O2 (2)/nm	0.2775	0.3165	0.2832	0.2827	0.2748	0.2789
Bi2/Ca2—O2 (3)/nm	0.2961	0.2733	0.3075	0.3086	0.3170	0.3111
Bi2/Ca2—O2 (4)/nm	0.3039	0.3313	0.3296	0.3356	0.3310	0.3277

Table 2. Selected bond lengths (nm) and bond angles (°) for CBNLCL-100x

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