Sagamihara, Japan
Sagamihara, Japan

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It is an object of the present invention to provide a crystallized glass which has various properties required for employing the substrate for information recording medium of the next generation, and also has significantly low specific gravity; and a crystallized glass substrate for information recording medium. A crystallized glass containing, as a crystal phase, one or more selected from RAl_(2)O_(4 )and R_(2)TiO_(4 )(wherein R is one or more selected from Mg and Fe), the crystallized glass comprising the components of SiO_(2 )of 50% to 70%, Al_(2)O_(3 )of 10% to 26%, TiO_(2 )of 1 to 15%, MgO of 2.5% to 25%, FeO of 0% to 8%, and ZnO of 0% to less than 2%, expressed in terms of mass percentage on an oxide basis, wherein the value of (Al_(2)O_(3)+MgO)/SiO_(2 )is 0.30 or more and 0.65 or less, and a specific gravity is less than 2.63.


Patent
Ohara Inc. | Date: 2014-02-19

There is provided an optical glass with a high refractive index and a low dispersion having a refractive index (nd) of not less than 1.75 and an Abbes number (d) of not less than 35 where the image formation characteristic is hardly affected by changes in temperature of the using environment. SiO_(2), B_(2)O_(3 )and La_(2)O_(3 )are contained as essential components and the ratio of the constituting components are adjusted whereby an optical glass in which a product of and where is an average linear expansion coefficient at 30 to +70 C. and is an optical elasticity constant at the wavelength of 546.1 nm is not more than 13010^(12) C.^(1)nmcm^(1)Pa^(1 )is able to be achieved.


Patent
Ohara Inc. | Date: 2013-05-15

An all-solid secondary battery has first electrode layers, and second electrode layers laminated on both sides of the first electrode layer with solid electrolyte layers placed in between, wherein at least one first opening is provided which penetrates the first electrode layer and the solid electrolyte layers adjacent to the first electrode layer, and the second electrode layers present on both sides of the first electrode layer are in contact with each other on the inside of the first opening.


Patent
Ohara Inc. | Date: 2015-05-13

To provide a crystallized glass capable of attaining the same clarification effect as in the composition containing an arsenic component and an antimony component even in the case of having the composition containing no arsenic component, while maintaining various physical properties peculiar to a Li_(2)O-Al_(2)O_(3)-SiO_(2)-based crystallized glass. Disclosed is a crystallized glass which is characterized by containing a predetermined amount of Li_(2)O, Al_(2)O_(3), and SiO_(2) components (on an oxide basis), and containing a predetermined amount of BaO component (on an oxide basis) and the like. This crystallized glass preferably contains -quartz and/or -quartz solid solution as main crystal phase(s), an average crystal particle size of the main crystal phase(s) being preferably within a range between 5 and 200 nm.


Patent
Ohara Inc. | Date: 2016-12-07

Provided is a high-strength crystallized glass or substrate having a high visible light transmittance and a good color balance, which is suitable for use in protecting members of portable electronic devices, optical devices and the like. Provided is a crystallized glass comprising, in terms of mol% on an oxide basis: an SiO_(2) component of 30.0% or more and 70.0% or less, an Al_(2)O_(3) component of 8.0% or more and 25.0%, an Na_(2)O component of 0% or more and 25.0% or less, an MgO component of 0% or more and 25.0% or less, a ZnO component of 0% or more and 30.0% or less and a TiO_(2) component of 0% or more and 10.0% or less, the molar ratio [Al_(2)O_(3)/(MgO+ZnO)] having a value of 0.5 or more and 2.0 or less, and comprising one or more selected from RAl_(2)O_(4), RTi_(2)O_(5), R_(2)TiO_(4), R_(2)SiO_(4), RAl_(2)Si_(2)O_(8) and R_(2)Al_(4)Si_(5)O_(18) as a crystal phase.


Disclosed is a photocatalyst stably having excellent photocatalytic activity. The photocatalyst contains a crystal having a NASICON structure. Here, the NASICON structure is represented by Formula A_(m)E_(2)(XO_(4))_(3) (in the formula, a primary element A is one or more selected from the group composed of Li, Na, K, Cu, Ag, Mg, Ca, Sr and Ba; a secondary element E is one or more selected from the group composed of Zn, Al, Fe, Ti, Sn, Zr, Ge, Hf, V, Nb, and Ta; a tertiary element X is one or more selected from the group composed of Si, P, S, Mo, and W, and a coefficient is 0 or more, and 3 or less).


Patent
Ohara Inc. | Date: 2013-09-18

To provide an all-solid lithium ion secondary battery having a high voltage, a small internal resistance, and a discharge capacity close to a theoretical capacity and being able to be produced at low cost, and therefore, even in the case of collective sintering, generation of an inactive material due to interface reaction at the interface between an electrode active material and a solid electrolyte is reduced. An all-solid lithium ion secondary battery including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer, wherein an electrode active material included in the positive electrode layer is a phosphate having an olivine structure; and a solid electrolyte crystal included in the solid electrolyte layer includes polyphosphoric acid and the content of Li_(2)O is 16 mol % to 25 mol % in terms of mol % on an oxide basis.


Patent
Ohara Inc. | Date: 2016-06-03

Provided is a high-strength crystallized glass or substrate having a high visible light transmittance and a good color balance, which is suitable for use in protecting members of portable electronic devices, optical devices and the like. Provided is a crystallized glass comprising, in terms of mol % on an oxide basis: an SiO_(2 )component of 30.0% or more and 70.0% or less, an Al_(2)O_(3 )component of 8.0% or more and 25.0%, an Na_(2)O component of 0% or more and 25.0% or less, an MgO component of 0% or more and 25.0% or less, a ZnO component of 0% or more and 30.0% or less and a TiO_(2 )component of 0% or more and 10.0% or less, the molar ratio [Al_(2)O_(3)/(MgO+ZnO)] having a value of 0.5 or more and 2.0 or less, and comprising one or more selected from RAl_(2)O_(4), RTi_(2)O_(5), R_(2)TiO_(4), R_(2)SiO_(4), RAl_(2)Si_(2)O_(8 )and R_(2)Al_(4)Si_(5)O_(18 )as a crystal phase.


Patent
Ohara Inc. | Date: 2014-10-30

To provide a crystallized glass capable of attaining the same clarification effect as in the composition containing an arsenic component and an antimony component even in the case of having the composition containing no arsenic component, while maintaining various physical properties peculiar to a Li_(2)OAl_(2)O_(3)SiO_(2)-based crystallized glass. Disclosed is a crystallized glass which is characterized by containing a predetermined amount of Li_(2)O, Al_(2)O_(3), and SiO_(2 )components (on an oxide basis), and containing a predetermined amount of BaO component (on an oxide basis) and the like. This crystallized glass preferably contains -quartz and/or -quartz solid solution as main crystal phase(s), an average crystal particle size of the main crystal phase(s) being preferably within a range between 5 and 200 nm.


Patent
Seiko Instruments Inc. and Ohara Inc. | Date: 2016-06-07

An electrochemical cell includes an all-solid-state electrode body in which a positive electrode layer and a negative electrode layer are laminated together through a solid electrolyte and an exterior body having a cavity in which the electrode body is stored. The exterior body has a first case and a second case which sandwich the electrode body and a sealing member that defines the cavity together with the first case and the second case by joining the first case and the second. The thermal expansion coefficients of the electrode body, the first case, the second case, and the sealing member are all 1010^(6)/ C. or lower.

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