Preparation method of tantalump-doped potassium-sodium niobate lead-free piezoelectric single crystal with high electromechanical coupling property
An electromechanical coupling, potassium sodium niobate technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, single crystal growth, single crystal growth, etc., can solve the problem of small single crystal size, low electromechanical coupling coefficient, niobate Potassium-sodium-based lead-free piezoelectric single crystal growth is difficult and other problems, to achieve the effect of uniform composition, outstanding performance, and excellent electrical properties
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[0020] Specific embodiment 1: This embodiment is a method for preparing tantalum-doped potassium sodium niobate lead-free piezoelectric single crystal with high electromechanical coupling performance, which is characterized in that tantalum-doped potassium sodium niobate lead-free piezoelectric single crystal with high electromechanical coupling performance The chemical formula of piezoelectric single crystal is (K 1-x Na x )(Nb 1-y Ta y )O 3 , Where 0.4
[0021] 1. Pre-fired synthetic polycrystalline powder raw materials:
[0022] ①. Prepare raw materials: According to the chemical formula (K 1-x Na x )(Nb 1-y Ta y )O 3 According to Na element: K element: Ta element: Nb element molar ratio is x: (1-x): y: (1-y) prepare Na 2 CO 3 , K 2 CO 3 , Ta 2 O 5 And Nb 2 O 5 ; Said (K 1-x Na x )(Nb 1-y Ta y )O 3 Medium: 0.4
[0023] ②, the Na weighed in step ① 2 CO 3 , ...
Example Embodiment
[0031] Specific embodiment two: this embodiment is different from specific embodiment one in that: (K 1-x Na x )(Nb 1-y Ta y )O 3 Middle: x=0.5, y=0.3. The other steps are the same as in the first embodiment.
Example Embodiment
[0032] Specific embodiment three: this embodiment is different from specific embodiment one or two in one of the following points: step one ② Na 2 CO 3 , K 2 CO 3 , Ta 2 O 5 And Nb 2 O 5 The volume ratio of the total mass of anhydrous ethanol is 1g:1mL. The other steps are the same as the first or second embodiment.
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