Niobium niobium antimony sodiate potassium leadless piezoelectric ceramic composition
A ceramic composition, lead-free piezoelectric technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., to achieve low sintering temperature, excellent piezoelectric performance, and stable preparation process
Inactive Publication Date: 2009-03-04
THE HONG KONG POLYTECHNIC UNIV
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Problems solved by technology
Traditional ceramic technology cannot produce dense and high-performance Na 1-x K x NbO 3
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0027] Recipe: (Na 0.5 K 0.5 )(Nb 0.99 Sb 0.01 )O 3 (99.5mol%)+MnO 2 (0.5mol%)
[0028] performance:
[0029] d 33 (pC / N)ε 33 / ε 0 k p (%)k t (%)T c (℃)
[0030] 114 325 46.2 48.8 406
Embodiment 2
[0032] Recipe: (Na 0.5 K 0.5 )(Nb 0.97 Sb 0.03 )O 3 (99.5mol%)+MnO 2 (0.5mol%)
[0033] performance:
[0034] d 33 (pC / N)ε 33 / ε 0 k p (%)k t (%)T c (℃)
[0035] 128 409 46.3 48.7 385
Embodiment 3
[0037] Recipe: (Na 0.5 K 0.5 )(Nb 0.94 Sb 0.06 )O 3 (99.5mol%)+MnO 2 (0.5mol%)
[0038] performance:
[0039] d 33 (pC / N)ε 33 / ε 0 k p (%)k t (%)T c (℃)
[0040] 176 665 50.8 51.5 316
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The invention provides lead-free sodium potassium niobate antimonate piezoelectric ceramic composition. The composition is lead-free piezoelectric ceramic solid solution formed by introducing high electronegativity Sb part into the B position of alkali metal niobate ferroelectrics (Na1-xKx) NbO3 with ABO3 type perofskite structure to replace Nb. The lead-free piezoelectric ceramic composition has the advantages that the piezoelectric performance is excellent, the Curie temperature is high, the thermostability of the piezoelectric performance is good, the preparation technique is stable, the composition is obtained by adopting tradition piezoelectric ceramics, the sintering temperature is low, and the compactness is good.
Description
technical field [0001] The invention relates to a piezoelectric ceramic composition, in particular to a novel multi-element niobate lead-free piezoelectric ceramic composition. Background technique [0002] Since the mid-1940s, the piezoelectricity of barium titanate ceramics was discovered, especially lead zirconate titanate Pb(Ti, Zr)O with excellent piezoelectric properties and high Curie temperature 3 After the successful development of ceramics, the structural feature is ABO 3 The research and development of lead-based perovskite piezoelectric ceramics is very active. Piezoelectric ceramics and piezoelectric ceramic devices have been widely used in industry, especially in the field of information industry. With Pb(Ti, Zr)O 3 Lead-based binary systems represented by lead zirconate titanate (Pb(Ti, Zr)O 3 ) as the base, add the third component [such as lead magnesium niobate (Pb (Mg 1 / 3 Nb 2 / 3 )O 3 ) as the representative] lead-based ternary piezoelectric ceramic ma...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C04B35/495H01L41/187
Inventor 郭建荣赁敦敏陈王丽华
Owner THE HONG KONG POLYTECHNIC UNIV
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