Methods of manufacturing a crystal-oriented ceramic and of manufacturing a ceramic laminate
A technology of ceramic layers and piezoelectric materials, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, layered products, piezoelectric/electrostrictive/magnetostrictive devices, etc. -Deterioration of piezoelectric properties of oriented ceramics, taking a long time to calcine, etc., to achieve the effects of reducing manufacturing costs, omitting template preparation steps, and high power
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Embodiment 1
[0122] Next, we will use the Figure 1-7 The embodiments of the present invention will be further described.
[0123] In this example, a crystal-oriented ceramic composed of a perovskite structure (ABO 3 ) composed of polycrystalline substances, and the crystal planes of each grain that constitutes the polycrystalline substances are oriented.
[0124] In this example, a tablet preparation step, a crystallization-promoting layer formation step and a calcination step were performed. During the tablet preparation steps, such as figure 1 As shown, a green sheet 1 composed of a piezoelectric material forming a polycrystalline substance of a perovskite structure was produced by calcination.
[0125] In the crystallization-promoting layer formation step, such as figure 1 As shown, a crystallization-promoting layer 15 comprising crystallization-promoting material particles 151 that enable growth of crystal grains in a polycrystalline mass upon firing is formed so as to be in con...
Embodiment 2
[0151] This example is an example of producing crystal-oriented ceramics by forming a crystallization-promoting layer on a green sheet containing template particles.
[0152] The crystal-oriented ceramics in this example consist of a polycrystalline substance containing a perovskite structure compound as a main component {Li 0.04 (K 0.5 Na 0.5 ) 0.96}(Nb 0.86 Ta 0.1 Sb 0.04 )O 3 , which was in the shape of a plate, and, like Example 1, had a cylindrical shape with an area of 52 square millimeters (8.5 mm in diameter) and a thickness of 80 μm.
[0153] The following will use Figure 8-1 5 to describe the details of the preparation method of the crystal-oriented ceramics in this embodiment.
[0154] First, template particles and piezoelectric materials are prepared, the template particles are composed of perovskite-type compounds, and the specific crystal planes (orientation planes) of the polycrystalline substances of the obtained crystal-oriented ceramics in the temp...
Embodiment 3
[0172] In Examples 1 and 2, crystal-oriented ceramics were prepared by forming a crystallization-promoting layer on a green sheet. This example is an example of producing crystal-oriented ceramics by forming a crystallization-promoting layer between green sheets.
[0173] Specifically, in the same manner as in Example 1, two green sheets having a thickness of 100 µm were prepared by using the slurry.
[0174] Then, the crystallization-promoting material particles made of MgO 2 Constituent particles (average particle size 0.8 μm) were dispersed in the slurry that had been used for the green sheet, and as Figure 16 As shown, the crystallization-promoting layer 15 is formed by applying a slurry on a green sheet 12 to a thickness of about 10 micrometers. Then, another green sheet 13 is stacked on the crystallization-promoting layer 15 to prepare a three-layer green sheet 1 . As shown in the figure, the crystallization-promoting layer 15 of the present embodiment includes a pie...
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Abstract
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