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A kind of inorganic ink material and its preparation method and application

An inorganic ink and ink technology, applied in the field of 3D printing, can solve the problems that 3D printing technology cannot be popularized and applied in the construction field, the setting time of magnesium phosphate cement is difficult to control, and the strength shrinkage in the later stage, etc., to achieve superior thixotropic performance and setting time Controllable, good bonding performance

Active Publication Date: 2019-12-03
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Technical problem to be solved: the purpose of this invention is to provide an inorganic ink material and its preparation method and application, in order to meet the performance requirements of architectural 3D printing for ink materials, and solve the problem that the existing 3D printing technology cannot be popularized and applied in the construction field due to material constraints The problem
In the present invention, magnesium oxide prepared by calcining at different temperatures is mixed with potassium dihydrogen phosphate to prepare magnesium phosphate cement, which is used as the basic material of 3D printing ink, and by adding mineral admixtures and admixtures, etc., the problem of setting time of magnesium phosphate cement is solved. Controlling, poor thixotropic performance, late strength shrinkage, poor volume stability and other issues make it meet the requirements of continuous construction of 3D printing buildings, especially the fine printing requirements of complex microstructure parts

Method used

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  • A kind of inorganic ink material and its preparation method and application
  • A kind of inorganic ink material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] By weight, weigh 20% of calcined magnesia at 1300°C, 34% of potassium dihydrogen phosphate, 37% of mineral admixture (including 27% of metakaolin, 10% of fly ash), 5% of coagulation regulator (of which borax 3%, disodium hydrogen phosphate 0.5%, triethanolamine 1.0%, citric acid 0.5%), polycarboxylate superplasticizer 1.5%, thixotropic agent 2.5% (wherein cellulose 1%, bentonite 1.5%), the above materials Stir and mix evenly to prepare ink materials. Weigh the sand according to the ink material: sand weight ratio of 1:1, add water according to the water: ink material weight ratio of 0.19, stir until the slurry is uniform, and pour the mortar specimen.

Embodiment 2

[0022] According to weight ratio, weigh 35% of calcined magnesia at 1600°C, 30% of potassium dihydrogen phosphate, 29% of mineral admixture (among them, 16% of metakaolin, 8% of bauxite, 5% of limestone powder), coagulant 4% (wherein 3.5% of borax, 0.5% of disodium hydrogen phosphate), 1% of polycarboxylate superplasticizer, 1% of cellulose, the above materials are uniformly stirred and mixed to prepare ink materials. Weigh the sand according to the ink material: sand weight ratio of 1:1, add water according to the water: ink material weight ratio of 0.18, stir until the slurry is uniform, and pour the mortar specimen.

Embodiment 3

[0024] By weight, weigh 20% of calcined magnesia at 1300°C, 40% of potassium dihydrogen phosphate, 32% of mineral admixture (among them, 26% of metakaolin, 6% of fly ash), 5% of coagulation regulator (of which borax 4%, triethanolamine 0.5%, citric acid 0.5%), polycarboxylate superplasticizer 1.5%, cellulose 1.5%, the above materials are uniformly stirred and mixed to prepare ink materials. Weigh the sand according to the ink material: sand weight ratio of 1:1, add water according to the water: ink material weight ratio of 0.18, stir until the slurry is uniform, and pour the mortar specimen.

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Abstract

The invention relates to an inorganic printing ink material and a preparation method and an application thereof. The inorganic printing ink material takes magnesium oxide, potassium dihydrogen phosphate and a mineral admixture as the main materials, a thickening time control agent, a water reducer and a thixotroping conditioning agent are added, and then the materials are uniformly mixed. The inorganic printing ink material comprises the materials by mass percentage: 10-40% of magnesium oxide, 17-51% of potassium dihydrogen phosphate, 10-60% of the mineral admixture, 0.5-5.0% of the thickening time control agent, 0.1-2.0% of the water reducer, and 1.0-5.0% of the thixotroping conditioning agent. The inorganic printing ink material has the advantages of controllable coagulation time, rapid intensity development, and good bonding performance, a prepared slurry has good thixotropy and can satisfy the 3D printing continuous construction.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to an inorganic ink material which can be used for 3D printing buildings and its preparation method and application. Background technique [0002] 3D printing is a rapid prototyping technology that uses a digital model as the basis and uses adhesive materials to manufacture objects by layer-by-layer printing. This technology has the characteristics of digitization, networking, personalization, intelligence, rapidity, and material saving, and is also called additive manufacturing technology. After more than 20 years of development, this printing technology has become increasingly mature and has been widely used in industries such as aerospace, automobile, medical equipment and mold manufacturing. [0003] 3D printing construction technology is a new technology produced by combining 3D printing with modern concrete materials. The principle of this technology is to use a computer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34B33Y70/00
CPCB33Y70/00C04B28/344C04B2111/00181C04B2111/00991C04B2201/50C04B22/066C04B14/106C04B18/08C04B22/0013C04B22/16C04B24/122C04B24/06C04B24/24C04B14/104C04B24/383C04B14/303C04B14/28
Inventor 莫立武吕利明邓敏
Owner NANJING TECH UNIV