METHOD FOR MANUFACTURING RECTANGULAR PARALLELEPIPED-SHAPED SINGLE CRYSTAL, RECTANGULAR PARALLELEPIPED-SHAPED SINGLE CRYSTAL, METHOD FOR MANUFACTURING CERAMICS, CERAMICS, PIEZOELECTRIC ELEMENT, PIEZOELECTRIC DEVICE, AND ELECTRONIC DEVICE
First Claim
1. A method for manufacturing a rectangular parallelepiped-shaped single crystal containing sodium niobate of a perovskite structure as a main component,the method comprising:
- heating a mixture 1 of bismuth sodium niobate which is formed from particles containing a plurality of crystals of a composition represented by General Formula (1);
Bi2.5Nam−
1.5NbmO3m+3 (m is an integer of 2 or more) and in which an average value ma of the m values in the particles is larger than 6 and sodium containing alkali metal halide at 1200°
C. or more and 1250°
C. or less to obtain a mixture 2 containing sodium niobate of a perovskite structure; and
removing a water soluble component from the mixture 2.
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Abstract
This invention is a method for manufacturing a rectangular parallelepiped-shaped single crystal containing sodium niobate of a perovskite structure as the main component, and the method includes a process of heating a mixture 1 of bismuth sodium niobate which is formed from particles containing a plurality of crystals represented by General Formula (1): Bi2.5Nam−1.5NbmO3m+3 (m is an integer of 2 or more) and in which an average value ma of the m values is larger than 6 and sodium containing alkali metal halide at 1200° C. or more and 1250° C. or less to obtain a rectangular parallelepiped-shaped single crystal containing sodium niobate as the main component.
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Citations
13 Claims
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1. A method for manufacturing a rectangular parallelepiped-shaped single crystal containing sodium niobate of a perovskite structure as a main component,
the method comprising: -
heating a mixture 1 of bismuth sodium niobate which is formed from particles containing a plurality of crystals of a composition represented by General Formula (1);
Bi2.5Nam−
1.5NbmO3m+3 (m is an integer of 2 or more) and in which an average value ma of the m values in the particles is larger than 6 and sodium containing alkali metal halide at 1200°
C. or more and 1250°
C. or less to obtain a mixture 2 containing sodium niobate of a perovskite structure; andremoving a water soluble component from the mixture 2. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A rectangular parallelepiped-shaped single crystal containing sodium niobate of a perovskite structure as a main component, wherein
the rectangular parallelepiped-shaped single crystal contains bismuth in an amount of 0.05 mol or more and 0.15 mol or less per mole of the sodium niobate, a Na/Nb ratio of the rectangular parallelepiped-shaped single crystal is 0.82 or more and 1.00 or less, and a ratio of a longest side length (Lmax) to a shortest side length (Lmin) of the rectangular parallelepiped is in a range of Lmax/Lmin of 4.0≦ - Lmax/Lmin≦
8.5. - View Dependent Claims (8, 9, 10, 11, 12, 13)
- Lmax/Lmin≦
Specification