Murata Manufacturing Co., Ltd.

A School Corporation Kansai University

Satoshi Kuretake

Masamichi Ando

Kentaro Ishihara

Nario Sugahara

Masamichi Andoh

Naoya Mori

Yuji Kintaka

Yoshiro Tajitsu

Hideto Sato

Takeshi Hayashi

Nobuhiko Tanaka

A light-emitting ceramic that includes a pyrochlore type compound that contains 0.01 mol % or more of Bi with respect to 100 mol % of the general formula M1M2M3O, wherein M1 is at least one of La, Y, Gd, Yb, and Lu, M2 is at least one of Zr, Sn, and Hf, M3 is at least one of Ta, Nb, and Sb, X, Y, Z, and W are positive numbers that maintain electrical neutrality, X+Y+Z=2.0, 0.005&#x2264;Z&#x2264;0.2, and 3X+4Y+5Z is 7.02 or less.

Light-emitting ceramic and wavelength conversion device

A supported catalyst for decomposing an organic substance that includes a carrier and catalyst particles supported on the carrier. The catalyst particles contain a perovskite-type composite oxide represented by ABMO, where A contains at least one of Ba and Sr, B contains Zr, M is at least one of Mn, Co, Ni, and Fe, y+z=1, x&#x3e;1, z&#x3c;0.4, and w is a positive value that satisfies electrical neutrality. An organic substance decomposition rate after the supported catalyst is subjected to a heat treatment at 950&#xb0; C. for 48 hours is greater than 0.97 when the organic substance decomposition rate before the heat treatment is regarded as 1, and an amount of the catalyst particles peeled off when the supported catalyst is ultrasonicated in water at 28 kHz and 220 W for 15 minutes is less than 1 wt % of the catalyst particles before untrasonication.

Supported catalyst for organic substance decomposition and organic substance decomposing apparatus

A supported catalyst for decomposing an organic substance that includes a support and a catalyst particle supported on the support. The catalyst particle contains a perovskite-type composite oxide represented by ABMO, where the A contains at least one selected from Ba and Sr, the B contains Zr, the M is at least one selected from Mn, Co, Ni and Fe, y+z=1, x&#x2265;0.995, z&#x2264;0.4, and w is a positive value satisfying electrical neutrality. A film thickness of a catalyst-supporting film supported on the support and containing the catalyst particle is 5 &#x3bc;m or more, or a supported amount as determined by normalizing a mass of the catalyst particle supported on the support by a volume of the support is 45 g/L or more.

Supported catalyst for organic substance decomposition and organic substance decomposition device

A honeycomb-structured catalyst for decomposing an organic substance, which includes a catalyst particle. The catalyst particle contains a perovskite-type composite oxide represented by ABMO, where the A contains at least of Ba and Sr, the B contains Zr, the M is at least one of Mn, Co, Ni, and Fe, y+z=1, 1.001&#x2264;x&#x2264;1.05, 0.05&#x2264;z&#x2264;0.2, and w is a positive value that satisfies electrical neutrality. The toluene decomposition rate is greater than 90% when toluene is decomposed using the honeycomb-structured catalyst subjected to a heat treatment at 1200&#xb0; C. for 48 hours and a gas that contains 50 ppm toluene, 80% nitrogen, and 20% oxygen as a volume concentration as a target at a space velocity of 30,000/h and a catalyst temperature of 400&#xb0; C.

Honeycomb-structured catalyst for organic substance decomposition and organic substance decomposing apparatus

An organic matter decomposition catalyst that contains a perovskite type complex oxide represented by ABMO, wherein A contains 90 at % or more of at least one element selected from the group consisting of Ba and Sr, B contains 80 at % or more of Zr, M is at least one element selected from the group consisting of Mn, Co, Ni, and Fe, y+z=1, x&#x3e;1, z&#x3c;0.4, and w is a positive value that satisfies electrical neutrality.

Organic matter decomposition catalyst, organic matter decomposition aggregate, and organic matter decomposition apparatus

A catalyst for decomposing an organic substance, the catalyst having a body which has a plurality of pores and the body contains a perovskite-type composite oxide represented by ABMO, where the A contains at least one selected from Ba and Sr, the B contains Zr, the M is at least one selected from Mn, Co, Ni, and Fe, 1.001&#x2264;x&#x2264;1.1, 0.05&#x2264;z&#x2264;0.2, y+z=1, and w is a positive value that satisfies electrical neutrality. The average pore diameter of the plurality of pores is 49 nm to 260 nm and the pore volume of each of the plurality of pores is 0.08 cm/g to 0.37 cm/g.

Catalyst for organic substance decomposition and organic substance decomposing apparatus

A light-emitting ceramic that includes a pyrochlore type compound that contains 0.01 mol % or more of Bi with respect to 100 mol % of ABO, and one co-added element selected from the group consisting of Mg, Ca, Zn, Sr, Ba, Sc, Ga, In, Yb, and Lu. The A site contains at least one selected from the group consisting of La, Y, and Gd in a total amount of 80 mol % or more, B contains at least Sn, and W is a positive number for maintaining electrical neutrality.

A light-emitting ceramic that contains, as a major component thereof, a pyrochlore compound represented by ABO, wherein A includes at least one element selected from the group consisting of La, Y, Gd, Yb and Lu, B includes Bi and at least one element selected from the group consisting of Zr, Sn and Hf, and W is a positive number.

Light-emitting ceramic, light-emitting element, and light-emitting device

A light-emitting element that includes a first wavelength conversion unit and a second wavelength conversion unit. The first wavelength conversion unit includes a ceramic containing, as a primary component, a pyrochlore-type compound represented by ABO. The second wavelength conversion unit includes a ceramic containing, as a primary component, a pyrochlore-type compound represented by ABO. Aand Aeach include at least one element selected from the group consisting of La, Y, Gd, Yb and Lu, and 0.001 mol % to 5 mol % of Bi. Band Beach include at least one element selected from the group consisting of Sn, Zr and Hf. The content of La in Ais higher than the content of La in A. The contents of Y, Gd, and Lu in Aare higher than the contents of Y, Gd and Lu in A.

Light-emitting element, method for producing same and light-emitting device

Provided is a light emitting ceramic such as a wavelength conversion ceramic or a radiation-to-light conversion ceramic, which emits light when radiation or light enters the ceramic, and which has a short light emission decay time. The light emitting ceramic is obtained by applying a heat treatment in a reducing atmosphere to a ceramic containing, as its main constituent, a pyrochlore compound represented by ABOwhere A includes at least one of La, Y, Gd, Yb, and Lu, and 0 to 5 mol % of Bi; B is at least one of Sn, Zr, and Hf; and w is a positive number for maintaining electroneutrality.

Light emitting ceramic, light emitting element, scintillator, and method for producing light emitting ceramic

A piezoelectric speaker that includes an electrode formed on opposing main surfaces of a piezoelectric sheet having a predetermined stretching axis and made of a chiral polymer. The electrode is divided into four electrode portions by a plurality of dividing lines extending in a radiation direction. The four electrode portions are distributed along the outer peripheral portion except for the central portion of a vibration region. Voltage is applied to the respective four electrode portions in such a manner that electric field vectors generated in the thickness direction of the piezoelectric sheet direct in opposite directions between the adjacent ones of four sheet portions of the piezoelectric sheet to which voltage is applied by the electrode portions.

Piezoelectric speaker, speaker apparatus, and tactile feedback apparatus

A piezoelectric element including a plurality of stacked piezoelectric sheets, wherein the stretching axis of a first piezoelectric sheet and the stretching axis of a second piezoelectric sheet of the plurality of piezoelectric sheets are oriented in different directions from each other. Preferably, the stretching axis of the first piezoelectric sheet and the stretching axis of the second piezoelectric sheet are intersected at an angle of 90 degrees.

Piezoelectric element and audio device

A hybrid lens () has a structure in which a resin layer () composed of an ultraviolet curable resin is formed on the surface of a lens base material () composed of translucent ceramic. The lens base material () is composed of translucent ceramic containing as a main component an oxide with a perovskite structure represented by A{M,(B1, B2)}O(A is at least one selected from Ba, Sr and Ca, B1 is at least one selected from In, Y, Zn and Mg, B2 is at least one selected from Ta and Nb, and M is at least one selected from Ti, Zr, Hf and Sn) and at least Fe and Cu as sub-components. When the Fe content and Cu content in the translucent ceramic are x and y, respectively, 3x+y is 40 ppm by weight or less so that the hybrid lens () having excellent uniformity in optical properties and no crack defect can be obtained.

Hybrid lens using translucent ceramic

A translucent ceramic having a high light transmittance is provided. It contains a perovskite compound having a composition represented by a general formula: (BaSrCa)(MB1B2)O(where M contains at least one of Sn, Zr and Hf, B1 represents at least one of Mg, Zn, Y and In, B2 represents at least one of Ta and Nb, each of conditions of 0&#x2266;s&#x2266;0.99, 0.01&#x2266;t&#x2266;0.45, x+y+z=1, 0&#x3c;x&#x2266;0.9, 1.00&#x2266;z/y&#x2266;2.40, and 0.97&#x2266;v&#x2266;1.05 is satisfied, and w represents a positive number for maintaining electrical neutrality) as a primary component. This translucent ceramic can be used as, for example, an objective lens () of an optical pickup () to provide advantages. In another aspect some of M is replaced by Ti.

Growing community of inventors

Nagaokakyo, Japan

Satoshi Kuretake