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A kind of premelted high refractive index optical coating material and its preparation method and application

An optical coating and high refractive index technology, applied in chemical instruments and methods, inorganic chemistry, sputtering coating, etc., can solve problems such as poor consistency of production batches and unstable performance of optical films, and achieve dense film layers and high performance Consistent, improved low-index effects

Active Publication Date: 2022-06-17
有研资源环境技术研究院(北京)有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The present invention aims at problems such as the unstable performance of the prepared optical film and the poor consistency of production batches existing in the current high refractive index materials, and proposes a new high refractive index optical coating and its preparation method

Method used

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  • A kind of premelted high refractive index optical coating material and its preparation method and application
  • A kind of premelted high refractive index optical coating material and its preparation method and application
  • A kind of premelted high refractive index optical coating material and its preparation method and application

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preparation example Construction

[0037] Embodiments of the present invention provide a pre-melted high refractive index optical coating material and a preparation method thereof. It mainly includes the following steps: using TiO 2 , Pr 6 O 11 and Ti powder as raw materials, mechanically mixed uniformly according to a certain ratio and then briqueted, then solid-phase synthesis and melting under high temperature vacuum, crystallized under vacuum state and cooled to room temperature to generate a new compound Pr 5 Ti 5 O 17 . The compound maintains a stable chemical composition during the evaporation process, and can form a very flat evaporation surface during pre-melting, which is beneficial to the process control of the coating process. The optical film layer coated with this material has high transmittance in the near-ultraviolet to near-infrared band, the film layer is dense, firm, and chemically stable, and can be used as a high-quality high-refractive index material for optical film system design and...

Embodiment 1

[0072] According to the raw material ratio of TiO 2 26%(wt.),Pr 6 O 11 71% (wt.), Ti 2.5% (wt.) were accurately weighed, mechanically mixed for 8 hours with a stirring mixer, and the mixed powder was mixed with a hydraulic press at 400N / cm 2 Under the pressure of 2000℃, the furnace is heated at a rate of 5℃ / min, and the temperature is 2000℃ and the degree of vacuum is 2×10 -1 The solid-phase synthesis reaction was carried out under the condition of Pa for 8 h, and cooled to room temperature under vacuum. The material prepared by this method is a black molten material (its appearance is as figure 2 As shown, the density of the material tested by the drainage method is 5.4g / cm 3 .

[0073] image 3 The XRD pattern of the praseodymium titanate fused particulate material prepared in Example 1 of the present invention is shown. Depend on image 3 It can be seen that the praseodymium titanate obtained by this method has a single-phase structure, and the structure is simil...

Embodiment 2

[0079] According to the raw material ratio of TiO 2 25%(wt.),Pr 6 O 11 72% (wt.), Ti 3% (wt.) were accurately weighed, mechanically mixed with a stirring mixer for 8 hours, and the mixed powder was mixed with a hydraulic press at 400N / cm 2 Under the pressure of briquetting and furnace, the furnace heating rate is 5℃ / min under vacuum state, the temperature is 1900℃, and the vacuum degree is 2×10 -1 The solid-phase synthesis reaction was carried out under the condition of Pa for 8 h, and cooled to room temperature under vacuum. The material prepared by this method is a black molten material (its appearance is as Image 6 shown), the density of the material tested by the drainage method is 5.4g / cm 3 .

[0080] When using, first fully pre-melt the material, and pre-melt the material in a water-cooled oxygen-free copper crucible. The pre-melting temperature is 2200 ° C. The pre-melting process does not splash, and the material surface is in a molten state after pre-melting. ...

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Abstract

The invention provides a pre-melted high-refractive-index optical coating material and a preparation method and application thereof, belonging to the field of optical thin film materials. The high refractive index optical coating material is praseodymium titanate, the chemical formula is Pr 5 Ti 5 o 17 ; And, the praseodymium titanate is based on TiO 2 、Pr 6 o 11 It is prepared by solid-phase synthesis reaction with Ti powder as raw material. The praseodymium titanate prepared by the preparation method provided by the invention maintains a stable chemical composition during the evaporation process, and can form a very smooth evaporation surface during pre-melting, which is beneficial to the process control of the coating process. Moreover, the optical film layer coated with praseodymium titanate of the present invention has high transmittance in the near-ultraviolet to near-infrared band. At the same time, the film layer is dense, firm, and chemically stable. High-efficiency materials are used in optical film system design and batch coating production.

Description

technical field [0001] The invention relates to the technical field of optical thin film materials, and mainly relates to a pre-melted high refractive index optical coating material and a preparation method and application thereof. Background technique [0002] Among optical coating materials, the choice of high refractive index materials for electron beam evaporation is very limited. Most of the high refractive index materials are oxides of titanium, zirconium, hafnium, tantalum, niobium and their mixtures or oxides with other metals. mixture of things. In the technical field, coating with a mixture can change the refractive index of a single oxide optical film layer, expand the selection range of materials for optical film system design, and improve the characteristics of the film such as stress. [0003] However, in these mixture materials, the melting points and vapor pressures of the components are different. If the components or proportions are not selected properly i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00C23C14/08C23C14/30
CPCC01G23/003C23C14/08C23C14/30C01P2006/10C01P2006/34C01P2006/60
Inventor 张碧田石志霞彭程孙静段华英张恒王星明
Owner 有研资源环境技术研究院(北京)有限公司
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