Canon Kabushiki Kaisha

University of Yamanashi

National Institute of Advanced Industrial Science and Technology

Tokyo Institute of Technology

Kyoto University

Tokyo University of Science Educational Foundation Administrative Organization

Sophia University

Nobuhiro Kumada

Satoshi Wada

Jumpei Hayashi

Takashi Iijima

Makoto Kubota

Takayuki Watanabe

Hiroshi Funakubo

Takanori Matsuda

Toshihiro Ifuku

Masaki Azuma

Soichiro Okamura

Kaoru Miura

Shunsuke Murakami

Tatsuo Furuta

Hiroshi Uchida

Hisato Yabuta

Kenichi Takeda

Hiroshi Saito

Hideaki Takahashi

Bong-Yeon Lee

Keisuke Yamato

Kenji Takashima

Tomoaki Mochiduki

Olga Alexandrovna Smirnova

Koji Suzuki

Miki Ueda

Zuyi Zhang

Mikio Shimada

Ichiro Fujii

Ryuta Mitsui

Provided is a lead-free piezoelectric material having a high Curie temperature, a satisfactory mechanical quality factor, and a satisfactory Young's modulus, and a piezoelectric element and a multilayered piezoelectric element each using the piezoelectric material. The piezoelectric material contains 0.04 mol % or more to 2.00 mol % or less of Cu with respect to 1 mol of a perovskite-type metal oxide represented by the following general formula: (KBiBa)Na(NbTi)Owhere relationships of 0&#x3c;v&#x2266;0.39, 0&#x3c;w&#x2266;0.39, 0.9&#x2266;w/v&#x2266;1.1, 0.80&#x2266;x&#x2266;0.95, and 0.85&#x2266;y&#x2266;0.95 are satisfied.

Piezoelectric material and piezoelectric element using the same, and electronic apparatus using the piezoelectronic element

Provided is a piezoelectric material excellent in piezoelectricity. The piezoelectric material includes a perovskite-type complex oxide represented by the following General Formula (1).A(ZnTi)MO&#x2003;&#x2003;(1)wherein A represents at least one kind of element containing at least a Bi element and selected from a trivalent metal element; M represents at least one kind of element of Fe, Al, Sc, Mn, Y, Ga, and Yb; x represents a numerical value satisfying 0.4&#x2266;x&#x2266;0.6; and y represents a numerical value satisfying 0.1&#x2266;y&#x2266;0.9.

Metal oxide

Provided are methods of manufacturing an oriented ceramics containing sodium niobate and a raw material thereof. Specifically, provided is a sodium niobate powder, including cuboidal sodium niobate particles having an average side length of 0.1 &#x3bc;m or more to 100 &#x3bc;m or less, at least one face of the cuboid including a (100) plane in pseudo-cubic notation, in which the sodium niobate powder has a perovskite single-phase structure.

Sodium niobate powder, method of manufacturing a sodium niobate powder, plate-like particle, method of manufacturing a plate-like particle, and method of manufacturing an oriented ceramics

Provided is a piezoelectric material that achieves both high piezoelectric performance and high Curie temperature. In addition, provided are a piezoelectric element, a liquid discharge head, an ultrasonic motor, and a dust removing device, which use the piezoelectric material. The piezoelectric material includes a perovskite-type metal oxide that is expressed by the following general formula (1): xBaTiO-yBiFeO-zBi(MTi)O(1), where M represents at least one type of element selected from the group consisting of Mg and Ni, x satisfies 0.25&#x2266;x&#x2266;0.75, y satisfies 0.15&#x2266;y&#x2266;0.70, z satisfies 0.05&#x2266;z&#x2266;0.60, and x+y+z=1 is satisfied.

Piezoelectric material, piezoelectric element, liquid discharge head, ultrasonic motor, and dust removing device

Provided is an oriented piezoelectric ceramic of satisfactory piezoelectricity, which includes a metal oxide represented by (1&#x2212;x)NaNbO-xBaTiO. Also provided are a piezoelectric element using the oriented piezoelectric ceramic which includes the metal oxide represented by (1&#x2212;x)NaNbO-xBaTiO, and a liquid discharge head, an ultrasonic motor, and a dust removing device which use the piezoelectric element. An oriented piezoelectric ceramic includes as a main component a metal oxide represented by the following general formula (1), in which the oriented piezoelectric ceramic has a lead content and a potassium content that are each 1,000 ppm or less: (1&#x2212;x)NaNbO-xBaTiO. . . General formula (1), where a relationship of 0&#x3c;x&#x3c;0.3 is satisfied.

Oriented piezoelectric ceramic, piezoelectric element, liquid discharge head, ultrasonic motor, and dust removing device

Provided is a piezoelectric ceramics that can achieve both high piezoelectric performance and a high Curie temperature. Also provided are a piezoelectric element, a liquid discharge head, an ultrasonic motor, and a dust removing device, which use the piezoelectric ceramics. The piezoelectric ceramics include a perovskite-type metal oxide expressed by a general formula (1): xBaTiO-yBiFeO-zBi(MTi)O, where M represents at least one type of element selected from the group consisting of Mg and Ni, x satisfies 0.40&#x2266;x&#x2266;0.80, y satisfies 0&#x2266;y&#x2266;0.30, z satisfies 0.05&#x2266;z&#x2266;0.60, and x+y+z=1 is satisfied, and are oriented in a (111) plane in a pseudocubic expression.

Piezoelectric ceramics, manufacturing method for piezoelectric ceramics, piezoelectric element, liquid discharge head, liquid discharge apparatus, ultrasonic motor, optical apparatus, vibration generator, dust removing device, imaging apparatus, and electronic apparatus

Provided is a piezoelectric material which has satisfactory insulation property and piezoelectric property and which does not contain lead and potassium. The piezoelectric material includes a perovskite-type metal oxide that is represented by the following general formula (1):(NaBa)(NbTi)O&#x2003;&#x2003;General formula (1)where relationships of 0.80&#x2266;x&#x2266;0.95 and 0.85&#x2266;y&#x2266;0.95 are satisfied, and y&#xd7;0.05 mol % or more to y&#xd7;2 mol % or less of copper with respect to 1 mol of the perovskite-type metal oxide.

A method of manufacturing ceramics includes: placing, on a base material, a first slurry in which a metal oxide powder is dispersed; applying a magnetic field to the first slurry to solidify the first slurry, thereby forming an under coat layer made of a first compact; placing, on the under coat layer, a second slurry containing a metal oxide powder constituting the ceramics; applying a magnetic field to the second slurry to solidify the second slurry, thereby forming a second compact to obtain a laminated body of the second compact and the under coat layer; and obtaining the ceramics made of the second compact by removing the under coat layer from the laminated body of the second compact and the under coat layer and then sintering the second compact, or sintering the laminated body of the second compact and the under coat layer and then removing the under coat layer.

Method of manufacturing ceramics and piezoelectric material

Provided is a manufacturing method for preferentially-oriented oxide ceramics having a high degree of crystal orientation. The manufacturing method includes: obtaining slurry containing an oxide crystal B having magnetic anisotropy; applying a magnetic field to the oxide crystal B, and obtaining a compact of the oxide crystal B; and subjecting the compact to oxidation treatment to obtain preferentially-oriented oxide ceramics including a compact of an oxide crystal C having a crystal system that is different from a crystal system of one of a part and a whole of the oxide crystal B. By (1) reacting raw materials, (2) reducing the oxide crystal A, or (3) keeping the oxide crystal A at high temperature and quenching the oxide crystal A, the oxide crystal B is obtained to be used in the slurry.

Preferentially-oriented oxide ceramics, piezoelectric element, liquid discharge head, ultrasonic motor, and dust removing device

Provided is an oriented piezoelectric material with satisfactory sintering property free of Pb that is a hazardous substance, and a water-soluble alkaline ion, and a production method therefor. To this end, provided is a compound, including a tungsten bronze structure metal oxide, in which: the tungsten bronze structure metal oxide contains at least metal elements of Ba, Bi, Ca, and Nb, the metal elements satisfying the following conditions in terms of molar ratio; and has a C-axis orientation. The compound shows Ba/Nb=a: 0.363&#x3c;a&#x3c;0.399, Bi/Nb=b: 0.0110&#x3c;b&#x3c;0.0650, and Ca/Nb=c: 0.005&#x3c;c&#x3c;0.105. The tungsten bronze structure metal oxide preferably includes (1&#x2212;x).CaBaNbO&#x2212;x.BaBiNbO(0.30&#x2266;x&#x2266;0.95).

Piezoelectric material and production method therefor

Manufacturing method for preferentially-oriented oxide ceramics, preferentially-oriented oxide ceramics, piezoelectric element, liquid discharge head, ultrasonic motor, and dust removing device

To provide a piezoelectric ceramic containing BiFeOhaving a {110} plane orientation in a pseudo-cubic form, which is suited for the domain engineering, the piezoelectric ceramic includes a perovskite-type metal oxide represented by the following general formula (1), and has a {110} plane orientation in a pseudo-cubic form:BiFeO-(1&#x2212;)ABO&#x2003;&#x2003;General Formula (1)where A and B each represent one kind or more of metal ions; A represents a metal ion having a valence of 1, 2 or 3; and B represents a metal ion having a valence of 3, 4, or 5, provided that x is within a range of 0.3&#x2266;x&#x2266;1.

Ceramic, piezoelectric device, and production method thereof

Provided is a piezoelectric material which includes a compound free of lead and alkali metal and has a good piezoelectric property. The piezoelectric material where tungsten bronze structure oxides being free of lead and alkali metal and represented by ABOand A'B&#x2032;Oare combined to form a morphotropic phase boundary has good piezoelectric property. The ABOis b(BaBiNbO)+(1&#x2212;b)(BaAgNbO) (0&#x2266;b&#x2266;1 and 0&#x3c;&#x3b1;&#x2266;0.4), and the A&#x2032;B&#x2032;Ois c(SrNbO)+d(CaNbO)+e(BaNbO) (0&#x2266;c&#x2266;0.8, 0&#x2266;d&#x2266;0.4, 0.1&#x2266;e&#x2266;0.9, and c+d+e=1).

Piezoelectric material

Provided is a piezoelectric material having good piezoelectric properties and a Curie temperature (Tc) of 150&#xb0; C. or higher, and a piezoelectric device using the piezoelectric material. The piezoelectric material includes a sintered body made of a perovskite-type metal oxide represented by the following general formula (1): xBi(MgTi)O-(1-x)BaTiO(1), where x satisfies 0.17&#x2266;x&#x2266;0.8, in which an average grain size of grains contained in the sintered body is 0.5 &#x3bc;m or larger to 10 &#x3bc;m or smaller, and the sintered body is polycrystalline. In addition, the piezoelectric device includes a piezoelectric material and a pair of electrodes disposed in contact with the piezoelectric material, in which the piezoelectric material is the above-mentioned piezoelectric material.

Growing community of inventors

Kofu, Japan

Nobuhiro Kumada