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Glass ceramic, sintered glass ceramic material, glass ceramic complex, glass micropowder, slurry-like mixture, and photocatalyst

A technology of glass ceramics and sintered body, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of weak photocatalytic activity, no crystal structure, insufficient Sufficient and other issues

Active Publication Date: 2012-04-18
OHARA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the technology of Japanese Patent Application Laid-Open No. 9-315837, titanium oxide as a photocatalyst does not have a crystalline structure and exists in an amorphous form in glass, so its photocatalytic activity is weak and insufficient.

Method used

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  • Glass ceramic, sintered glass ceramic material, glass ceramic complex, glass micropowder, slurry-like mixture, and photocatalyst
  • Glass ceramic, sintered glass ceramic material, glass ceramic complex, glass micropowder, slurry-like mixture, and photocatalyst
  • Glass ceramic, sintered glass ceramic material, glass ceramic complex, glass micropowder, slurry-like mixture, and photocatalyst

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Experimental program
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Effect test

no. 1 approach

[0071] First Embodiment: Glass Ceramics

[0072] The glass ceramics of this embodiment contain a crystal phase (hereinafter sometimes referred to as "WO") containing tungsten oxide and / or a solid solution thereof. 3 Crystal phase"). Glass ceramics is a material obtained by precipitating a crystal phase in a glass phase by heat-treating glass, and is also called "crystallized glass". Glass ceramics may include not only materials having a glass phase and a crystal phase, but also Also include the material that all glass phases become crystalline phases, that is, the amount of crystallization (crystallinity) in the material is 100% by mass.The glass-ceramic of this embodiment can utilize the control of the crystallization process to control the grain size of the crystal, the precipitation The type and degree of crystallinity.

[0073] [composition]

[0074] Next, the components of the glass ceramics according to the present embodiment will be described. In addition, in this sp...

no. 2 approach

[0216] Second embodiment: glass ceramic sintered body and its manufacturing method

[0217] Next, the glass-ceramics sintered body and its manufacturing method which are 2nd Embodiment of this invention are demonstrated. The glass-ceramic sintered body of the present embodiment is a glass-ceramic sintered body obtained by sintering pulverized glass, and contains at least a crystal phase (WO) containing tungsten oxide and / or a solid solution thereof. 3 crystal phase). That is, the glass ceramics sintered body of this embodiment contains the glass ceramics of 1st Embodiment.

[0218]The manufacturing method of the glass-ceramic sintered body of this embodiment has a vitrification process, a pulverization process, a molding process, and a sintering process as a main process. The details of each step will be described below. In addition, the term "glass-ceramic sintered body" refers to a material obtained by solidifying and sintering a powdery material including glass frit. Th...

no. 3 approach

[0297] Third Embodiment: Glass-ceramic composite and its manufacturing method

[0298] Next, a glass-ceramic composite according to a third embodiment of the present embodiment and a method for producing the same will be described. In the present embodiment, the glass-ceramic composite (hereinafter sometimes referred to as "composite") is a material including a glass-ceramic layer obtained by heat-treating glass to form a crystal phase, and a base material. The glass-ceramic layer of the composite contains at least a crystalline phase (WO) comprising tungsten oxide and / or its solid solution 3 crystal phase). That is, the glass-ceramic composite of this embodiment contains the glass-ceramics of 1st Embodiment.

[0299]

[0300] The manufacturing method of the glass-ceramic composite body of this embodiment comprises the steps of firing pulverized glass obtained from the raw material composition on a base material to form 3 The process (firing process) of the glass ceramic ...

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Abstract

Disclosed are a glass ceramic, a sintered glass ceramic material, a glass ceramic complex, a glass ceramic micropowder, a slurry-like mixture, and a photocatalyst, each of which comprises a crystalline phase comprising tungsten oxide and / or a solid solution thereof and has a photocatalytic activity. The glass ceramic may contain 10 to 95 mol% of a WO3 component and may additionally contain 0 to 60 mol% of a P2O5 component, 0 to 60 mol% of a B2O3 component, 0 to 60 mol% of an SiO2 component, and / or 0 to 60 mol% of a GeO2 component relative to the total amount of all components in terms of oxide contents.

Description

technical field [0001] The present invention relates to glass ceramics and their utilization. Background technique [0002] Titanium oxide and tungsten oxide are known to have high photocatalytic activity. These photocatalytically active compounds (hereinafter sometimes abbreviated as "photocatalysts") generate electrons or holes when irradiated with light having an energy higher than the band gap energy. Therefore, near the surface of the molded body containing the photocatalyst, Redox reactions are strongly promoted. It is also known that the surface of a molded article containing a photocatalyst exhibits a hydrophilic property that is easily wetted by water, and therefore has a so-called self-cleaning effect that can be washed by water droplets such as rainwater. [0003] As a photocatalyst, titanium oxide has been mainly researched. However, since titanium oxide has a band gap of 3 to 3.2 eV, it needs to be irradiated with ultraviolet light with a wavelength of 400 nm ...

Claims

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Application Information

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IPC IPC(8): C03C10/02B01J23/30B01J27/188B01J35/02C03C12/00C09D7/12C09D201/00
CPCC03C10/00
Inventor 傅杰
Owner OHARA
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