摘要:
A method for preparing polycrystalline fluoride ceramics using powder of fluoride ceramics nanocrystallites as starting material, wherein said method comprises: (a) Optionally, a pre-processing step at a temperature ranging from 100°C to 300°C at vacuum of 10 -5 mbar (10 -3 Pa) to 10 -8 mbar (10 -6 Pa) for 30 minutes to 10 hours, (b) Applying a uniaxial pressure in the range from 1 to 200 MPa, at or around ambient temperature, to obtain a pre-compacted sample, (c) Applying to the pre-compacted of step b) a hydrostatic pressure by Cold Isostatic Pressing, to obtain a pre-compacted sample, (d) Loading the pre-compacted sample from step (c) into a die and submitting said sample to a uniaxial compression in combination with electric field-assisted sintering, under vacuum equal to or higher than 5 Pa. Polycrystalline fluoride ceramics obtained by this method find use in IR devices.
摘要:
A method of purifying a spinel powder includes contacting a spinel powder with an acid solution to form an acid-washed spinel composition and contacting the acid- washed spinel composition with a basic solution to form a purified composition. The purified powder is suited to formation of low-absorption shaped bodies, such as windows for high intensity laser devices.
摘要:
The invention relates to the use of a printing sol as construction material in an additive manufacturing process for producing a 3-dim article, the printing sol comprising solvent(s), nano-sized crystalline zirconia particles in an amount from 2 to 25 vol.-% with respect to the volume of the sol, the average primary particle size of the nano-sized crystalline zirconia particles being in a range up to 50 nm, a first monomer being a polymerizable surface modification agent represented by formula A-B, with A being capable of attaching to the surface of the nano-sized crystalline zirconia particles and B being a radiation curable group, optionally a second monomer, the second monomer comprising at least one radiation curable moiety but no acidic or silane group(s), photo initiator(s). The invention also relates to a ceramic article obtainable according to such a process.
摘要:
A transparent, tape casted, spinel article, as defined herein. Also disclosed is a method of method of making the tape casted, transparent spinel, and laminates of the tape casted. transparent spinel, as defined herein.
摘要:
Gegenstand der vorliegenden Erfindung ist ein stoffschlüssiges Verbundbauteil, Verfahren zu dessen Herstellung sowie dessen Verwendung. Insbesondere betrifft die Erfindung stoffschlüssige transparente Keramik-Verbundbauteile, Verfahren zur Herstellung solcher Keramik-Verbundbauteile sowie deren Verwendung.
摘要:
A transparent body can include a layer of a ceramic material and a compound. The compound can fill a defect extending from an edge of the layer, seal the edge, or both. In an embodiment, the edge is ground and is not polished. The compound can help to keep defects from propagating, improve fracture toughness, and reduce the likelihood that a crack will form during subsequent fabrication or use of the transparent body. Thus, the transparent body can be more scratch resistant than glass, such as cover glass, and still have acceptable resistance to cracking. The transparent body can be formed using a method where a compound precursor solution is applied to the edge, and the compound precursor solution is reacted or cured to form the compound.