Canon Kabushiki Kaisha

Fujitsu Corporation

Bridgestone Sports Co., Ltd.

Fuji Chemical Company, Limited

Kyoto University

University of Yamanashi

National Institute of Advanced Industrial Science and Technology

Tokyo Institute of Technology

Tokyo University of Science Educational Foundation Administrative Organization

Sophia University

Ebara Corporation

Sophia School Corporation

Screen Holdings Co., Ltd.

Canon Kabushiki Kaha

Makoto Kubota

Jumpei Hayashi

Tatsuo Furuta

Takanori Matsuda

Hisato Yabuta

Takayuki Watanabe

Kaoru Miura

Kanako Oshima

Motokazu Kobayashi

Toshihiro Ifuku

Kenji Maeda

Fumio Uchida

Chiemi Shimizu

Yasushi Shimizu

Shinya Koyama

Koji Suzuki

Miki Ueda

Akira Uebayashi

Hideo Matsunaga

Hidenori Tanaka

Masaki Azuma

Shunsuke Murakami

Mikio Shimada

Shinji Eritate

Tomonari Nakayama

Kenichi Takeda

Nobuhiro Kumada

Toshinobu Ohnishi

Masaomi Hiruta

Yuichi Shimakawa

Daisuke Miura

Hiroshi Funakubo

Keiko Abe

Takashi Iijima

Satoshi Wada

Hiroshi Uchida

Kenji Takashima

Hitoshi Ueno

Nobuhiro Yasui

Tetsumei Tsuruoka

Yoshihiro Ohashi

Kenichi Abiru

Soichiro Okamura

Yoshihiko Matsumura

Tatsuya Suzuki

Yasunori Imamoto

Akane Masumoto

Yoshitaka Nakamura

Hirato Shimasaki

Kenichi Akashi

Bong-Yeon Lee

Daisuke Mikame

Yuu Hasebe

Hiroki Imai

Tetsuro Fukui

Naoki Oguchi

Yoshinori Kotani

Hiroshi Takahashi

Hidetoshi Tsuzuki

Masami Tsukamoto

Toshiaki Aiba

Jun Ogawa

Hisao Suzuki

Shintaro Yasui

Hisashi Yamagishi

Takashi Nakajima

Takao Kato

Takao Ogura

Hiroshi Nagasawa

Hitoshi Nishitani

Noriyuki Fukuyama

Takeshi Yasuie

Akira Fukunaga

Hajime Miyazaki

Naoaki Ogure

Tsutomu Nakada

Suguru Tachibana

Kuniaki Horie

Toshiya Yuasa

Kouichirou Amemiya

Toshifumi Urakami

Nami Nagata

Kaishi Ohashi

Masatoshi Watanabe

Hiroyuki Kanda

Masaaki Takase

Kazumine Matoba

Masafumi Nishitani

Kenichiro Arai

Tomoaki Yamada

Tomohiro Watanabe

Koki Motoyoshi

Tomonari Morishita

Shinji Kajita

Satomi Sugiyama

Yosuke Inoue

Satoshi Fujita

Junko Mine

Fukuji Kihara

Provided are a method of manufacturing a ceramic article in which the improvement of mechanical strength, wear resistance, and machinability is achieved using a direct modeling system, and a ceramic article. The manufacturing method includes the steps of: (i) arranging powder containing ceramics as a main component on a base; (ii) irradiating a part or an entirety of the arranged powder with an energy beam to melt and solidify the powder, to thereby obtain an intermediate modeled article; (iii) causing the modeled article to absorb a metal component-containing liquid to impregnate the modeled article therewith; and (iv) subjecting the modeled article having absorbed the metal component-containing liquid to heat treatment.

Ceramics product manufacturing method and ceramics product

Provided are a powder for laser manufacturing which can be stably manufactured and from which a three-dimensional manufactured object ensuring a manufacturing accuracy can be obtained and a using method thereof. A powder for ceramic manufacturing for obtaining a manufactured object by repeatedly sintering or fusing and solidifying in sequence a powder in an irradiation portion with laser light, in which the powder includes a plurality of compositions, at least one composition of the compositions is an absorber that relatively strongly absorbs the laser light compared to other compositions, and at least a part of the absorber changes to a different composition that relatively weakly absorbs the laser light by irradiation with the laser light and a using method of a powder in which the powder is used.

Powder for ceramic manufacturing, ceramic manufactured object, and manufacturing method thereof

A piezoelectric material includes: an oxide containing Na, Ba, Nb, Ti, and Mn, in which the oxide has a perovskite-type structure, a total amount of metal elements other than Na, Ba, Nb, Ti, and Mn contained in the piezoelectric material is 0.5 mol % or less with respect to a total amount of Na, Ba, Nb, Ti, and Mn, a molar ratio x of Ti to a total molar amount of Nb and Ti is 0.05&#x2264;x&#x2264;0.12, a molar ratio y of Na to Nb is 0.93&#x2264;y&#x2264;0.98, a molar ratio z of Ba to Ti is 1.09&#x2264;z&#x2264;1.60, a molar ratio m of Mn to the total molar amount of Nb and Ti is 0.0006&#x2264;m&#x2264;0.0030, and 1.07&#x2264;y&#xd7;z&#x2264;1.50 is satisfied.

Piezoelectric material, piezoelectric element, and electronic equipment

The present invention provides a vibrator made of a non-lead-based piezoelectric material and capable of being driven at a sufficient speed with low power consumption, and provides a vibration wave drive device and an electronical device each using the vibrator. To that end, the vibrator according to the present invention includes a piezoelectric element including a piezoelectric material and electrodes, and an elastic body, wherein a Pb component contained in the piezoelectric material is less than 1000 ppm, and a resonance frequency fin a vibration mode A and a resonance frequency fin a vibration mode B satisfy a relation of an absolute value of (f&#x2212;f)&#x3e;2 (kHz), the vibration mode A and the vibration mode B generating vibration waves in the elastic body with wave fronts of the vibration waves intersecting each other.

Vibrator, vibration wave drive device, vibration wave motor, and electronical device

Provided is a piezoelectric ceramics including crystal grains each including: a first region that is formed of a perovskite-type metal oxide having a crystal structure in which a central element of a unit cell is located at an asymmetrical position; and a second region that is formed of a perovskite-type metal oxide having a crystal structure in which a central element of a unit cell is located at a symmetrical position, and that is present inside the first region, wherein a ratio of a cross-sectional area of the second region to a cross-sectional area of the piezoelectric ceramics is 0.1% or less.

Piezoelectric ceramics, piezoelectric element, and electronic apparatus

Provided is a piezoelectric ceramics having a gradual change in piezoelectric constant depending on an ambient temperature. Specifically, provided is a single-piece piezoelectric ceramics including as a main component a perovskite-type metal oxide represented by a compositional formula of ABO, wherein an A site element in the compositional formula contains Ba and M, the Mbeing formed of at least one kind selected from the group consisting of Ca and Bi, wherein a B site element in the compositional formula contains Tand M, the Mbeing formed of at least one kind selected from the group consisting of Zr, Sn, and Hf, wherein concentrations of the Mand the Mchange in at least one direction of the piezoelectric ceramics, and wherein increase and decrease directions of concentration changes of the Mand the Mare directions opposite to each other.

Piezoelectric ceramics, manufacturing method for piezoelectric ceramics, piezoelectric element, vibration device, and electronic device

A lead-free piezoelectric material includes perovskite-type metal oxide containing Na, Nb, Ba, Ti, and Mg and indicates excellent piezoelectric properties. The piezoelectric material satisfies the following relational expression (1): 0.430&#x2264;a&#x2264;0.460, 0.433&#x2264;b&#x2264;0.479, 0.040&#x2264;c&#x2264;0.070, 0.0125&#x2264;d&#x2264;0.0650, 0.0015&#x2264;e&#x2264;0.0092, 0.9&#xd7;3e&#x2264;c&#x2212;d&#x2264;1.1&#xd7;3e, a+b+c+d+e=1, where a, b, c, d, and e denote the relative numbers of Na, Nb, Ba, Ti, and Mg atoms, respectively.

A piezoelectric transformer comprises at least a laminate of a first member, a first piezoelectric element, a second piezoelectric element and a second member sequentially stacked one on the other in the above-listed order and a pressurizing mechanism for squeezing the first member and the second member together in the stacking direction. The ratio of the electromechanical coupling coefficient krelative to the electromechanical coupling coefficient k(k/k) of the first piezoelectric element and the second piezoelectric element is not less than 2.0.

Piezoelectric transformer and electronic apparatus

Provided is a lead-free piezoelectric material reduced in dielectric loss tangent, and achieving both a large piezoelectric constant and a large mechanical quality factor. A piezoelectric material according to at least one embodiment of the present disclosure is a piezoelectric material including a main component formed of a perovskite-type metal oxide represented by the general formula (1): Na(BiBa)NbTiO(where 0.84&#x2264;x&#x2264;0.92, 0.84&#x2264;y&#x2264;0.92, 0.002&#x2264;(w+s)(1&#x2212;y)&#x2264;0.035, and 0.9&#x2264;w/s&#x2264;1.1), and a Mn component, wherein the content of the Mn is 0.01 mol % or more and 1.00 mol % or less with respect to the perovskite-type metal oxide.

A vibration device comprises a vibrating member having at least n (n&#x2265;2) piezoelectric elements arranged on a vibrating plate, each of the piezoelectric elements being formed by using a lead-free piezoelectric material and electrodes, wherein if the temperature that maximizes the piezoelectric constant of the piezoelectric material of each of the n piezoelectric elements is expressed as T(m being a natural number between 1 and n), at least two of Tthrough Tdiffer from each other.

Vibration device for dust removal and imaging device

Provided is a method of manufacturing an oscillator, including: arranging an electrode on a piezoelectric ceramics free from being subjected to polarization treatment, to thereby provide a piezoelectric element; bonding the piezoelectric element and a diaphragm to each other at a temperature T; bonding the piezoelectric element and a power supply member to each other at a temperature T; and subjecting the piezoelectric ceramics to polarization treatment at a temperature T, in which the temperature T, the temperature T, and the temperature Tsatisfy a relationship T&#x3e;Tand a relationship T&#x3e;T

Method of manufacturing an oscillator

A piezoelectric material which is low in load on the environment, and also satisfies both the requirements of a high piezoelectric constant and a high mechanical quality factor. The piezoelectric material comprises a plurality of crystal grains containing Ba, Ca, Ti, Zr, Mn, and O. An average equivalent circle diameter of the crystal grains is not smaller than 1.0 &#x3bc;m and not larger than 10 &#x3bc;m. The crystal grains include crystal grains A each having a first domain with a width of not smaller than 300 nm and not larger than 800 nm, and crystal grains B each having a second domain with a width of not smaller than 20 nm and not larger than 50 nm.

Piezoelectric material, piezoelectric element, vibration wave motor, optical apparatus, and electronic apparatus

A piezoelectric element includes a piezoelectric material layer and an electrode layer, wherein the piezoelectric material layer and the electrode layer are stacked on top of each other, the piezoelectric material layer includes a barium titanate-based material, and two coercive fields Ecand Ecof the piezoelectric element have the same sign and satisfy (|EcEc|)&#x2265;8 kV/cm.

Piezoelectric element, vibrator, vibration wave motor, optical apparatus, and electronic apparatus

Growing community of inventors

Yokohama, Japan

Makoto Kubota