A green body for a 3D ceramic and/or metallic body is produced by providing a metal or a mixture of metals and/or a metalloid and/or a non-metal or mixtures thereof in form of at least one aqueous solutions, such as a metal nitrate solution; if more than one aqueous solutions are provided, they differ in composition and/or isotope concentration. One aqueous metal solution is mixed with a gelation fluid at a first temperature to suppress an internal gelation of the feed solution mixture prior to its ejection. The feed solution mixture is ejected by inkjet printing to the green body under construction. The ejected feed solution is heated mixture on the green body to a second temperature to fix it on the green body under construction. Several process steps are repeated according to a 3D production control model until a desired form of the green body is attained.

Aqueous admixtures for inorganic binder compositions, useful in the field of additive manufacturing including a) 12-55, preferably 15-50 weight-%, especially 20-45 weight-% of at least one anionic polymer selected from the group consisiting of plasticizers, water reducers, superplasticizers and workability retainers for inorganic binders, b) 15-35 weight-%, preferably 20-30 weight-% of at least one water insoluble liquid defoamer, and c) optionally 1-10 weight-%, preferably 2-5 weight-% of at least one retarder, based on 100 weight-% of the aqueous composition.

An electromagnetic interference (EMI) resistant cementitious ink comprising a hydraulic cement, calcium carbonate, silica sand, taconite material, and a conductive material. A ratio of the silica sand to the taconite material is 1:1. In some embodiments, the taconite material includes taconite powder and fine taconite aggregate having a ratio of 1:1. In some embodiments, the conductive material includes carbon-based nanoparticles in solution. In further embodiments, the EMI-resistant cementitious ink has a shielding effectiveness in accordance with ASTM D4935-18 of at least 4.0 dB.

A process for making a layered multi-material structural element having controlled mechanical failure characteristics. The process includes the steps of: supplying a cementitious layer and forming a polymer layer on the cementitious layer by additive manufacture such that the polymer layer has a first thickness and the cementitious layer has a second thickness, wherein the polymer layer comprises a polymer and the cementitious layer comprises a cementitious material; and allowing the polymer from the polymer layer to suffuse into the cementitious layer for a period of time to obtain a suffused zone in the cementitious layer such that the suffused zone has a third thickness that is less than half the second thickness.

The present invention discloses a slurry feedstock for extrusion-based three-dimensional, 3D, printing of a functionally graded article, and/or for casting an article under a low pressure at a room temperature, a method of preparing the same, a method of extrusion-based 3D printing and/or casting, and a system therefor. The slurry feedstock comprises a build material comprising a metal, a ceramic or any combinations thereof, an organic polymer binder, an additive and a volatile organic solvent. The build material mixed with the additive and the organic polymer binder dissolved with the volatile organic solvent form a first pre-mix and a second pre-mix, respectively, that are mixed to form a substantially homogeneous and flowable slurry mixture that is used for producing articles.

A method for forming a structure through three-dimensional (3D) printing, the method comprising applying through a 3D printing apparatus one or more layers of a mortar composition, in which the mortar composition comprises a mortar powder and one or more epoxies. In addition, a mortar composition comprising a mortar powder and one or more epoxies for use in forming a structure through three-dimensional printing. The mortar powder may comprise a cement, such as a hydraulic cement, and an aggregate. The mortar powder may further comprise one or more admixtures. The one or more epoxies may comprise a polymeric resin, and may be bisphenol-based or water-based. Further, the mortar composition may also comprise a curing agent.

Composition for additive manufacturing by binder jet printing, comprising a ceramic particulate material subjected to a heat treatment and a binder particulate material, wherein the heat treatment comprises heating a particulate ceramic material from 600 to 1200? C. for 1 to 20 h, to produce the ceramic particulate material subjected to a heat treatment and the binder particulate material is a water-soluble compound. Method for additive manufacturing by binder jet printing of a conformed object comprising repeating the steps of depositing a layer of composition of the invention on a printing bed and depositing a liquid binder.

The invention solves the problems of mechanical fragility of objects conformed by binder jet printing and design defects thereof, wherein the heat treatment creates bonds and aggregations between particles of the ceramic material, maintaining them during printing.

Systems and methods for printing a luminescent 3-dimensional object. The method includes mixing a dry cementitious composition with water, the dry cementitious composition comprising a cementitious binder, conveying the mixture to a print head, applying the mixture and one or more luminescent compounds from the print head to form a luminescent 3-dimensional object, and curing the luminescent 3-dimensional object.

Disclosed is a powder build material handling system for a three-dimensional printer. The system comprises a delivery system. The delivery system is to carry powder build material in a flow of gas from a powder build material supply. The delivery system is to filter the flow of gas to separate the powder build material from the flow of gas. The delivery system is to direct the filtered flow of gas to the powder build material supply to form a closed system.

The invention describes a process for obtaining clay having improved characteristics that comprises incorporating an inorganic matrix onto an organic matrix at determined proportions. The industrial clay obtained is malleable and highly resistant to compression and strain, of great use in the industry of prototype elaboration.