Piezoelectric material, piezoelectric element, and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9496484-B2
Application number	US-201314423687-A
Country	US
Kind code	B2
Filing date	Aug 21, 2013
Priority date	Aug 27, 2012
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

The present invention provides a piezoelectric material not containing lead and potassium, showing satisfactory insulation and piezoelectricity, and having a high Curie temperature. The invention relates to a piezoelectric material includes a main component containing a perovskite-type metal oxide represented by Formula (1): (Na x Ba 1-y )(Nb y Ti 1-y )O 3 (wherein, 0.80≦x≦0.94 and 0.83≦y≦0.94), and an additive component containing at least one element selected from Mn and Ni, wherein the content of the Ni is 0 mol or more and 0.05 mol or less based on 1 mol of the perovskite-type metal oxide, and the content of the Mn is 0 mol or more and 0.005 mol or less based on 1 mol of the perovskite-type metal oxide.

First claim

The invention claimed is:

1. A piezoelectric material comprising:
a main component comprising a perovskite-type metal oxide represented by Formula (1):
(Na x Ba 1-y )(Nb y Ti 1-y )O 3 (wherein, 0.80≦x≦0.94 and 0.83≦y≦0.94), and
an additive component comprising at least one element selected from Mn and Ni, wherein
the content of the Ni is 0 mol or more and 0.05 mol or less based on 1 mol of the perovskite-type metal oxide; and
the content of the Mn is 0 mol or more and 0.005 mol or less based on 1 mol of the perovskite-type metal oxide (provided that both the content of Mn and the content of Ni are not simultaneously 0 mol)
wherein a relative dielectric constant of the piezoelectric material is 200 or more and 1090 or less, and
wherein a resistivity of the piezoelectric material is 44 GΩ·cm or more and 3250 GΩ·cm or less.

2. The piezoelectric material according to claim 1 , further comprising 0.01 mol or less (excluding 0 mol) of Cu based on 1 mol of the perovskite-type metal oxide.

3. The piezoelectric material according to claim 1 , wherein a requirement of x<y in Formula (1) is satisfied.

Assignees

• Canon Kk

Inventors

• Ueda Miki
• Watanabe Takayuki
• Murakami Shunsuke

Classifications

• C04B2235/3262

  Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO · CPC title

• C04B2235/81

  Materials characterised by the absence of phases other than the main phase, i.e. single phase materials · CPC title

• B41J2202/03

  Specific materials used · CPC title

• C04B2235/3232

  Titanium oxides or titanates, e.g. rutile or anatase · CPC title

• C04B2235/768

  Perovskite structure ABO3 · CPC title