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High refractive index evaporation material lanthanum titanate mixture and preparation method thereof

A technology of high refractive index and mixture, applied in titanium compounds, chemical instruments and methods, optics, etc., can solve the problems of low yield, large amount of powder, long sintering time, etc., to reduce sintering time, easy to melt and evaporate, and reduce use conditional effect

Active Publication Date: 2012-07-04
FUJIAN ACETRON NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing preparation method of oxide film material is that the powder is directly vacuum sintered by molding or the powder is directly vacuum sintered and broken into particles. The sintering time is long, and it is broken after sintering. The initial powder is more and the yield is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Raw material TiO 2 and La(OH) 3 According to the molar ratio La: Ti = 1: 1 configuration, the preliminary catalytic reaction is carried out by water and ethanol as an organic catalyst at room temperature, and then the composite produced by the above catalytic reaction is processed into a certain specification shape by a press, and the semi-finished product obtained is The placed crucible is moved to an atmospheric pressure high-temperature furnace, and the temperature of the furnace is raised to 1300°C for pretreatment to make the product preliminarily shaped, and then the semi-finished product obtained is placed in a vacuum sintering furnace, and the vacuum is evacuated to 10 -3 Pa, keep cooling after 4 hours, and prepare the lanthanum titanate mixture material (La 2 Ti 2 o 7 and La 4 Ti 9 o 24 ). In practice, a small amount of Ti can be added to the raw material.

Embodiment 2

[0016] The raw materials TiO2, Ti and La(OH)3 are configured in a molar ratio La:Ti=1:2, and the preliminary catalytic reaction is carried out by water and glycerol as an organic catalyst at room temperature, and then the above catalytic reaction is produced by a press. The compound is processed into a certain specification shape, the obtained semi-finished product is placed in the crucible, moved to the atmospheric pressure high-temperature furnace, and the furnace temperature is raised to 700 ° C for pretreatment, so that the product is initially shaped, and then the obtained semi-finished product is placed in the vacuum sintering furnace In, vacuum to 10 -3 Pa, keep cooling after 2 hours, and prepare the lanthanum titanate mixture material (La 2 Ti 2 o 7 and La 4 Ti 9 o 24 ). In practice, a small amount of Ti can be added to the raw material.

[0017] The preparation method of the present invention effectively solves the problem of shape and size through pre-molding ...

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Abstract

The invention relates to a high refractive index evaporation material lanthanum titanate mixture and a preparation method thereof. The mixture is composed of La2Ti2O7 and La4Ti9O24 in a chemical formula. The preparation method thereof comprises the following steps: taking TiO2 and La(OH)3 as raw materials, and mixing to be uniform; carrying out an initial catalytic reaction at normal temperature,and obtaining the required shape by cold pressing or hot pressing; transferring a crucible filled with the obtained semi-finished product into a normal-pressure high-temperature furnace, and heating the furnace to 700-1300 DEG C for processing, thus the product is initially sized; and placing the semi-finished product into a vacuum sintering furnace, heating the whole system to 1400-1600 DEG C and vacuumizing, insulating for 2-4 hours, and cooling to obtain the lanthanum titanate mixture material. The preparation method has high production efficiency, manufacturing cost is low, and lanthanum titanate mixture in arbitrary shape can be prepared, the melting point of the prepared lanthanum titanate mixture is low, and the prepared lanthanum titanate mixture is easy to be melted and evaporated to form a stable optical coating.

Description

【Technical field】 [0001] The invention relates to a preparation method of a high refractive index evaporation material lanthanum titanate mixture. 【Background technique】 [0002] High refractive index optical film materials are widely used in the design of various optical film systems. They are mainly used in conjunction with low refractive index materials or medium refractive index materials to prepare various antireflection films. These films are mainly used in optical instruments. Lenses, prisms, mirrors, etc. Currently widely used high refractive index materials mainly include various titanium, zirconium, hafnium, tantalum, niobium oxides and their mixed materials. [0003] Now, with the continuous update and development of optical applications and the continuous improvement of performance requirements, the evaporated thin film materials must also develop synchronously. The oxide thin film material is an important part of the thin film material, and various elements ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/10C01G23/00
Inventor 陈本宋陈钦忠
Owner FUJIAN ACETRON NEW MATERIALS CO LTD
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