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Reversible photochromic transparent ceramic as well as preparation method and application thereof

A transparent ceramic and photochromic technology, applied in the field of ceramic materials, can solve the problems of inability to be used in the field of smart windows, slow response, non-transparency of photochromic ceramics, etc., to achieve fast response time, high stability, and high discoloration contrast. Effect

Active Publication Date: 2022-03-08
SONGSHAN LAKE MATERIALS LAB +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide reversible photochromic transparent ceramics, so as to solve the technical problems in the prior art that photochromic ceramics are non-transparent, slow in response, etc., and cannot be used in the field of smart windows, etc.

Method used

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  • Reversible photochromic transparent ceramic as well as preparation method and application thereof
  • Reversible photochromic transparent ceramic as well as preparation method and application thereof
  • Reversible photochromic transparent ceramic as well as preparation method and application thereof

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preparation example Construction

[0050] The present invention also provides a method for preparing any one of the above-mentioned reversible photochromic transparent ceramics, comprising the following steps:

[0051] According to the chemical composition, Ba source, A source, Mg source and B source are mixed with additives for grinding, and then calcined, shaped and sintered.

[0052] In a specific embodiment of the present invention, the A source is selected from ZrO 2 , SnO 2 、TiO 2 and HfO 2 At least one of; the B source is selected from Ta 2 o 5 and Nb 2 o 5 At least one of: the Ba source is barium carbonate, and the Mg source is magnesium oxide.

[0053] In a specific embodiment of the present invention, the auxiliary agent includes a dispersant, a binder and a sintering auxiliary agent. In actual operation, the type and amount of dispersant, binder and sintering aid can be adjusted according to actual needs. Existing conventional additives can be selected to achieve the corresponding conventiona...

Embodiment 1

[0063] This embodiment provides a method for preparing a reversible photochromic transparent ceramic, including the following steps:

[0064] (1) Press Ba(Zr 0.16 Mg 0.28 Ta 0.56 )O 3 The stoichiometric weighing of BaCO 3 , ZrO 2 , MgO, Ta 2 o 5 (The molar ratio of Ba, Zr, Mg, Ta is 1: 0.16: 0.28: 0.56) to obtain the mixed powder, add 0.5%, 1% and 0.5% of the mass of the mixed powder respectively dispersant oleic acid, binder polymer Vinyl butyral and tetraethyl orthosilicate as a sintering aid to obtain a mixed material; then add ethanol 1.2 times the mass of the mixed material, and add zirconia balls according to the ball-to-material ratio of 1:3 (the weight ratio of large and small balls is 1:1 , the size of the large ball is 10 mm, and the size of the small ball is 5 mm), all of which are placed in a polytetrafluoroethylene ball mill tank, and the ball mill is treated for 24 hours to obtain a mixed slurry.

[0065] (2) Then, suck the slurry and dry it in an oven at...

Embodiment 2

[0068] This embodiment provides a reversible photochromic transparent ceramic Ba(Sn 0.16 Mg 0.28 Ta 0.56 )O 3 The preparation method, the specific steps refer to Example 1, the only difference is that the ZrO in the step (1) 2 Replaced by SnO 2 .

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Abstract

The invention relates to the technical field of ceramic materials, in particular to reversible photochromic transparent ceramic as well as a preparation method and application thereof. The chemical composition of the reversible photochromic transparent ceramic is Ba (AxMgyBz) O3, wherein A is selected from at least one of Zr, Sn, Ti and Hf; b is selected from at least one of Ta and Nb; 4x + 2y + 5z = 4, x is greater than 0 and less than 1, y is greater than 0 and less than 1, and z is greater than 0 and less than 1. The reversible photochromic transparent ceramic disclosed by the invention has the characteristic of reversible conversion from grey white to brown. The Ba (AxMgyBz) O3 photochromic ceramic changes color under the condition of irradiation of about 365 nm and can restore to the original shape under the condition of irradiation of about 450 nm or heating, and the reversible photochromic transparent ceramic is high in color change contrast.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a reversible photochromic transparent ceramic and its preparation method and application. Background technique [0002] Since the first report by Fritsche in 1867, photochromic materials have attracted much attention due to their potential applications in optical data storage, smart windows, optical switches, optical anti-counterfeiting labels, protective camouflage, coating industry, etc. In recent decades, widely reported photochromic materials are mainly divided into three categories: organic, inorganic, and organic-inorganic hybrid materials. Compared with other systems, inorganic photochromic materials have the advantages of excellent mechanical strength, long cycle life and thermochemical stability, and are the materials of choice for optical devices. At present, the inorganic photochromic materials that have been studied more can be divided into three categories...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622C09K9/00G02F1/00G02F1/01G02F1/055E06B9/24
CPCC04B35/495C04B35/622C09K9/00G02F1/0009G02F1/0126G02F1/0556E06B9/24C04B2235/3215C04B2235/3244C04B2235/3251C04B2235/3206C04B2235/3293C04B2235/3232C04B2235/9646E06B2009/2405
Inventor 曹永革文子诚左传东唐巍李英魁
Owner SONGSHAN LAKE MATERIALS LAB
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