Preparation method of n-zinc titanate powder and application

A technology of zinc orthotitanate and powder, which is applied in the direction of titanate, chemical instruments and methods, titanium compounds, etc., can solve the problems affecting the absorption performance and performance degradation of the coating, and achieve high yield and strong stain resistance , the effect of high hardness

Inactive Publication Date: 2018-03-23
BEIJING SATELLITE MFG FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The existing low-absorption and high-heat control coatings for spacecraft mainly use zinc oxide system. This type of coating has a large performance degradation under vacuum ultraviolet conditions, which affects the absorption performance of the coating.

Method used

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  • Preparation method of n-zinc titanate powder and application
  • Preparation method of n-zinc titanate powder and application
  • Preparation method of n-zinc titanate powder and application

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preparation example Construction

[0035] see figure 1 , the embodiment of the present invention provides a preparation method of zinc orthotitanate powder, comprising the following steps:

[0036] Step 1. Co-precipitate zinc chloride and butyl titanate with oxygen-containing weak acid; specifically, the oxygen-containing weak acid used in the present invention can be any oxygen-containing acid that reacts with zinc chloride and butyl titanate to form oxide precipitate Weak acids, preferably carboxylic acids;

[0037] Step 2. After the co-precipitation reaction is completed, ammonia water is added to the reaction system provided in step 1 for neutralization, and then filtered and dried to obtain the precursor; specifically, it can be dried by natural drying or drying.

[0038] Step 3. Sintering the precursor at high temperature to obtain zinc orthotitanate powder.

[0039] The preparation method of zinc orthotitanate powder provided in the embodiment of the present invention adopts butyl titanate as a titaniu...

Embodiment 1

[0055] Preparation

[0056] 1) Weigh 270g oxalic acid and dissolve it in 1200g deionized water to make oxalic acid solution B;

[0057] 2) Weigh 270g of zinc chloride and 340g of butyl titanate into 400g of absolute ethanol and stir for 30min to make solution A;

[0058] 3) Drop A solution into oxalic acid solution B with a constant pressure burette, and stir for 1 hour to prepare solution C;

[0059] 4) Drop ammonia water into solution C with a constant pressure burette to adjust the pH value to about 7, and stir for 1 hour to obtain D;

[0060] 5) Filter D and wash it with deionized water for 3 times, then put it into a vacuum oven and heat at 120°C for 10 hours to dry;

[0061] 6) Put the powder obtained after drying into a muffle furnace and heat at 500°C for 2 hours, then raise the temperature to 900°C and heat for 2 hours, take it out and cool;

[0062] 7) Weigh 100 g of concentrated sulfuric acid and add it into 1000 ml of deionized water to prepare a dilute sulfuric a...

Embodiment 2

[0069] 1) Weigh 100g oxalic acid and dissolve it in 500g deionized water to make oxalic acid solution B;

[0070] 2) Weigh 150g of zinc chloride and 180g of butyl titanate into 300g of absolute ethanol and stir for 30min to make solution A.;

[0071] 3) Drop A solution into oxalic acid solution B with a constant pressure burette, and stir for 1 hour to prepare solution C;

[0072] 4) Drop ammonia water into solution C with a constant pressure burette, adjust the pH value to about 7, and stir for 1 hour to obtain D;

[0073] 5) Filter D and wash it with deionized water for 3 times, then put it into a vacuum oven and heat it at 100°C for 15h to dry;

[0074] 6) Mill the dried powder with a planetary ball mill at 30 Hz for 10 hours;

[0075] 7) Put the ball-milled powder into a muffle furnace and heat at 450°C for 3 hours, then raise the temperature to 900°C and heat for 3 hours, take it out and cool;

[0076] 8) Weigh 100 g of concentrated sulfuric acid and add it into 1000 m...

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Abstract

The invention provides a preparation method of n-zinc titanate powder and application and belongs to the technical field of thermal control coatings of spacecrafts. The preparation method comprises the following steps: performing a co-precipitation reaction on zinc chloride and butyl titanate with a weak acid; after the co-precipitation reaction is completed, putting ammonium hydroxide into the reaction system provided by the step 1, implementing neutralization, filtring, and drying so as to obtain a precursor; performing high-temperature sintering on the precursor, thereby obtaining the n-zinc titanate powder. By adopting the preparation method of the n-zinc titanate powder provided by the embodiment of the invention, butyl titanate is adopted as a titanium source, n-zinc titanate powderwhich is relatively high in purity and small in particle size is prepared, and the powder is relatively low in sunshine absorption rate and good in space environment stability when being used as thermal control packing, and a thermal control coating prepared from the powder is relatively high in hardness and relatively good in stain resistance.

Description

technical field [0001] The invention relates to a preparation method and application of zinc orthotitanate powder, belonging to the technical field of spacecraft thermal control coatings. Background technique [0002] The thermal control design of the spacecraft is one of the important designs of the spacecraft. The reasonable thermal control design ensures that the structural components and instruments of the spacecraft are within the normal working temperature in the space environment and meet the use requirements. Thermal control coating is an important means in spacecraft thermal control technology. In the space vacuum environment, by selecting different solar absorption ratios (α S ) and infrared emissivity (ε H ) thermal control coating to regulate the surface temperature of spacecraft and instruments. [0003] Paint-type thermal control coatings have become the first choice for thermal control coatings on the surfaces of various long-life spacecraft and large radiat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00C04B14/30C04B28/26
CPCC01G23/003C01P2002/72C01P2004/61C04B14/305C04B28/26
Inventor 张杭张家强文陈平托张立功贺光辉崔庆新白晶莹
Owner BEIJING SATELLITE MFG FACTORY
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