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Zinc titanate ceramic precursor slurry and method for preparing zinc titanate ceramic through 3D printing

A ceramic precursor, zinc titanate technology, applied in the field of ceramics, can solve the problem of unsuitable rheological properties of sol-gel

Active Publication Date: 2019-12-20
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are sol-gel preparations based on tetrabutyl titanate and isopropyl titanate to prepare ZnO-TiO 2 It is a microwave dielectric ceramic, but the rheological properties of the sol-gel are not suitable for fine direct writing 3D printing

Method used

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  • Zinc titanate ceramic precursor slurry and method for preparing zinc titanate ceramic through 3D printing
  • Zinc titanate ceramic precursor slurry and method for preparing zinc titanate ceramic through 3D printing
  • Zinc titanate ceramic precursor slurry and method for preparing zinc titanate ceramic through 3D printing

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Experimental program
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Effect test

Embodiment 1

[0032] This embodiment provides a zinc titanate ceramic precursor slurry, which is prepared according to the following steps:

[0033] Preparation of titanium-containing source solution: Add 0.6g of polyvinylpyrrolidone (PVP, molecular weight 55000) into 8mL of absolute ethanol, stir until completely dissolved, then add 12.5mL of bis(acetylacetonate) diisopropyl titanate ( 75wt.% isopropanol solution), mixed to obtain titanium-containing source solution;

[0034] Preparation of zinc source solution: Add 1.5mL 28% ammonia water and 1.8mL deionized water into 8mL absolute ethanol, stir well, then add 0.5g zinc oxide powder, stir until zinc oxide reacts with ammonia water until completely dissolved, mix Obtain zinc source solution;

[0035] Preparation of the slurry: adding the zinc-containing source solution into the titanium-containing source solution, heating and stirring in a water bath at 80° C. for about 1 to 2 hours until a gel is formed.

[0036] figure 1 It is the rhe...

Embodiment 2

[0038] This embodiment provides a zinc titanate ceramic, prepared according to the following steps:

[0039] Get the zinc titanate ceramic precursor slurry prepared in Example 1 and put it into the barrel to be printed;

[0040] 3D printing molding: write the G code program of the wood pile structure, set the distance between the medium rods to 250μm, select the glass needle with a diameter of 60μm, set the pressure to 85psi, and the printing speed to 5mm / s, for the sol-gel zinc titanate ceramic precursor Carry out fine direct writing 3D printing molding of the body slurry to obtain the embryo body;

[0041] Calcination treatment: Sinter the above-mentioned green body by adopting a multi-step heat preservation sintering process, specifically: raise the temperature to 450°C at a rate of 0.5°C / min for 4 hours, then raise the temperature to 600°C at a rate of 0.5°C / min for 4 hours, and then The temperature was raised to 850°C at a rate of 2°C / min for 5 hours, and finally cooled ...

Embodiment 3

[0046] This embodiment provides a zinc titanate ceramic, prepared according to the following steps:

[0047] Preparation of titanium-containing source solution: Add 0.6g of polyvinylpyrrolidone (PVP, molecular weight 55000) into 8mL of absolute ethanol, stir until completely dissolved, then add 12.5mL of bis(acetylacetonate) diisopropyl titanate ( 75wt.% isopropanol solution), mixed to obtain titanium-containing source solution;

[0048] Preparation of zinc-containing source solution: Add 5mL 28% ammonia water and 1.8mL deionized water into 12mL absolute ethanol, stir evenly, then add 2.09g zinc oxide powder, stir until zinc oxide and ammonia water react until completely dissolved, and mix to obtain Zinc source solution;

[0049] Preparation of the zinc titanate ceramic precursor slurry: Add the zinc-containing source solution to the titanium-containing source solution, heat, stir and evaporate in a water bath at 80°C for about 2 to 3 hours until a gel is formed. At this time...

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Abstract

The invention discloses zinc titanate ceramic precursor slurry and a method for preparing zinc titanate ceramic through 3D printing. The zinc titanate ceramic precursor slurry is prepared from a titanium source-containing solution and a zinc source-containing solution through a sol-gel method, wherein the titanium source-containing solution comprises titanium diisopropoxide bis(acetylacetonate), asurfactant and a first volatile solvent, and the zinc source-containing solution comprises a zinc source, ammonia water and a second volatile solvent. The slurry has the characteristic of shear thinning, and is very suitable for 3D printing. By controlling different proportions of titanium and zinc in the slurry, different phases of ceramic obtained after printing forming and sintering of the slurry can be controlled, and a wide application prospect is achieved.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a zinc titanate ceramic precursor slurry and a method for preparing zinc titanate ceramics by 3D printing. Background technique [0002] With the development of new-generation mobile communication technology, higher requirements are put forward for new high-performance dielectric materials. The traditional method is generally to improve the performance of dielectric ceramics by improving their composition and structure. Research in recent years has shown that using the idea of ​​metamaterials to design the structure of dielectric ceramics is also a very effective method. Through the periodic artificial structure design of dielectric ceramic materials, extraordinary physical properties that are not found in nature can be realized. However, the artificially designed structure must rely on the fine processing of materials, and the fine processing of ceramic materials has always b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/624B33Y70/00B33Y80/00
CPCB33Y70/00B33Y80/00C04B35/462C04B35/624C04B2235/3284C04B2235/443C04B2235/444C04B2235/448C04B2235/449C04B2235/48C04B2235/6562C04B2235/6567
Inventor 李勃王荣朱朋飞潘瑜辉
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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