Compositions and methods of preparation and use for controlled release solid scale inhibitors used in hydraulic fracturing operations in oil and gas wells. The controlled release scale inhibitors comprise amorphous glass which is a reaction product of a phosphorus-containing compound, a calcium-containing compound, a magnesium-containing compound and base. The composition has a predetermined dissolution rate for controlled release of scale inhibitors in induced hydraulic fractures in hydraulic fracturing treatment of oil or gas wells.

Disclosed is a low temperature co-fired dielectric material with an adjustable dielectric constant, wherein it comprises a zirconia main phase and a silicon-based amorphous filler, a weight ratio of the zirconia main phase to the silicon-based amorphous filler is 40-65: 35-60; a weight percentage of SiO.sub.2. in the silicon-based amorphous filler is ≥50%. The dielectric constant of low temperature co-fired dielectric material can be continuously adjusted in a wide range of 7-12, the dielectric loss can be as low as 0.1% at 1 MHz. The material system can be sintered at 800-900° C. and co-fired with silver electrode. It can be used as the low temperature co-fired dielectric material. The invention also discloses a method for preparing the low temperature co-fired dielectric material with an adjustable dielectric constant.

A method of making a glass-ceramic article includes synthesizing a feedstock gel that includes a base oxide network comprising Na.sub.2O, CaO, and SiO.sub.2, in which a molar ratio of Na.sub.2O:CaO:SiO.sub.2 in the gel is 1:2:3, and then converting the feedstock gel into a glass-ceramic article such as a container or a partially-formed container. The conversion of the feedstock gel into a glass-ceramic container may be performed at a temperature that does not exceed 900° C. and may include the steps of pressing the feedstock gel into a compressed solid green-body, sintering the green-body into a solid monolithic body of a glass-ceramic material, deforming the solid monolithic glass-ceramic body into a glass-ceramic preform, and cooling the preform. A glass-ceramic article having a glass-ceramic material that has a molar ratio of Na.sub.2O:CaO:SiO.sub.2 that is 1:2:3 is also disclosed.

Doped glass scintillators and methods of fabricating the same are provided. Doped glass scintillators can be fabricated by a stereolithography process, and doping can be carried out before the green body composite formation so that homogeneity of the dopant is improved. The structures retain an amorphous structure through the fabrication process, and the vacuum sintering process assists with keeping the dopants in their luminescence-producing oxidation state.

Doped glass scintillators and methods of fabricating the same are provided. Doped glass scintillators can be fabricated by a stereolithography process, and doping can be carried out before the green body composite formation so that homogeneity of the dopant is improved. The structures retain an amorphous structure through the fabrication process, and the vacuum sintering process assists with keeping the dopants in their luminescence-producing oxidation state.

The present invention provides additive manufacturing compositions, also referred as “inks” in the field of additive manufacturing, which can be fine-tuned with respect to porosity by varying the intensity of the photopolymerisation light source and which can further be used to obtain objects out of glasses, ceramics or glass-ceramics and their respective alloys.

The invention relates to a process for manufacturing a microfluidic chip comprising a solid material obtained from a sol-gel solution, the process comprising successively: a) casting a sol-gel solution made with tetraethyl orthosilicate onto a mold presenting a relief pattern and having a different thickness over the whole of the mold; b) gelling the sol-gel solution; c) unmolding and drying the gel obtained in b), so as to obtain a solid glass; and d) bonding said solid glass to a support, so as to obtain the microfluidic chip.

The invention discloses porous, bioactive glass and glass ceramic morsels or pellets to be used as tissue graft substitute materials and processes for obtaining the same wherein the bioactive glass and glass ceramic morsels or pellets are made up of natural agents like phosphate, calcium, sodium and other elements which are not alien to the human or animal body. The said preparation process encompasses various steps like quenching sintering, foaming, and sol-gel casting which render the glass morsels or pellets unique bioactivity and enhanced porosity which may facilitate tissue repair and augmentation during tissue graft replacement.

An additive manufacturing ink composition may include a fluid medium. The ink may further include a chalcogenide glass suspended within the fluid medium to form a chalcogenide glass mixture. The ink may also include a surfactant. A method for forming an additive manufacturing ink may include wet milling a chalcogenide glass in a fluid medium and a surfactant to produce a chalcogenide glass mixture. The method may also include, after wet milling the chalcogenide glass, processing the chalcogenide glass mixture to reduce an average particle size of the chalcogenide glass.

A device formation method may include printing a chalcogenide glass ink onto a surface to form a chalcogenide glass layer, where the chalcogenide glass ink comprises chalcogenide glass and a fluid medium. The method may further include sintering the chalcogenide glass layer at a first temperature for a first duration. The method may also include annealing the chalcogenide glass layer at a second temperature for a second duration. A device may include a substrate and a printed chalcogenide glass layer on the substrate, where the printed chalcogenide glass layer includes annealed chalcogenide glass, and where the printed chalcogenide glass layer is free from cracks.