# US 8,783,834 B2 · Liquid ejecting head and liquid ejecting apparatus

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- Number: US 8,783,834 B2
- Document ID: US8783834B2
- Status: Granted
- Kind: B2
- Application number: 13/044,324
- Filed: 2011-03-09
- Published: 2011-09-15
- Granted: 2014-07-22
- Earliest claimed: 2010-03-10
- Assignees: Seiko Epson Corporation
- Applicants: Tomohiro Sakai; Satoshi Kimura
- Inventors: Tomohiro Sakai; Satoshi Kimura
- Web page: https://patentgrep.com/patent/US8783834B2

## CPC

- B41J 2/14072: {Electrical connections, e.g. details on electrodes, connecting the chip to the outside...}
- C01G 23/003: {Titanates (C01G23/001 takes precedence)}
- C01G 29/006: {Compounds containing bismuth, with or without oxygen or hydrogen, and containing two or more other elements}
- C04B 35/462: based on titanates
- C04B 35/475: based on bismuth titanates
- C01P 2002/52: containing elements as dopants
- C04B 2235/3201: Alkali metal oxides or oxide-forming salts thereof
- C04B 2235/3203: Lithium oxide or oxide-forming salts thereof
- C04B 2235/3215: Barium oxides or oxide-forming salts thereof
- C04B 2235/3284: Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
- C04B 2235/3298: Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
- C04B 2235/768: Perovskite structure ABO3
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

There is provided a liquid ejecting head comprising a pressure generating chamber and a piezoelectric actuator having a piezoelectric material consisting of composite oxide. The composite oxide contains bismuth, sodium, barium, titanium, and zinc. A ratio of zinc content to the total amount of titanium and zinc is 0.35 mol % or more and 1.25 mol % or less.

## Claims

### Claim 1

A liquid ejecting head comprising:
a pressure generating chamber communicating with a nozzle opening; and
a piezoelectric actuator having
an electrode and
a piezoelectric material consisting of composite oxide, wherein the composite oxide contains bismuth, sodium, barium, titanium, and zinc, and does not contain niobium;
a ratio of zinc content to the total amount of titanium and zinc is 0.35 mol % or more and 1.25 mol % or less; and
a ratio of barium content to the total amount of bismuth, sodium and barium is 4.5 mol % or more and 7.5 mol % or less.

### Claim 2 (depends on 1)

The liquid ejecting head according to claim 1, wherein a ratio of zinc content to the total amount of titanium and zinc is 0.90 mol % or more.

### Claim 3 (depends on 1)

The liquid ejecting head according to claim 1, wherein a ratio of zinc content to the total amount of titanium and zinc is 0.40 mol % or more.

### Claim 4 (depends on 1)

A liquid ejecting apparatus comprising the liquid ejecting head according to claim 1.

### Claim 5

A piezoelectric device comprising:
a piezoelectric material consisting of a composite oxide, wherein the composite oxide contains bismuth, sodium, barium, titanium, and zinc and does not contain niobium;
a ratio of zinc content to the total amount of titanium and zinc is 0.35 mol % or more and 1.25 mol % or less; and
a ratio of barium content to the total amount of bismuth, sodium and barium is 4.5 mol % or more and 7.5 mol % or less.

### Claim 6 (depends on 1)

The liquid ejecting head according to claim 1, wherein the composite oxide further contains an element selected from a group consisting of lithium, potassium, rubidium, cesium, silver, magnesium, calcium, and strontium, and wherein and a ratio of sodium with the selected element to the total amount of bismuth, sodium, barium, and the selected element is 41.0 mol % or more and 49.0 mol % or less.

### Claim 7 (depends on 5)

The piezoelectric device according to claim 5, wherein the composite oxide further contains an element selected from a group consisting of lithium, potassium, rubidium, cesium, silver, magnesium, calcium, and strontium, and wherein and a ratio of sodium with the selected element to the total amount of bismuth, sodium, barium, and the selected element is 41.0 mol % or more and 49.0 mol % or less.