93 results about "Glass-ceramic" patented technology

Glass and glass-ceramic compositions having a combination of lithium silicate and petalite crystalline phases are described, as well as methods of making the glass and glass-ceramic compositions. The compositions are compatible with conventional rolling and float processes, are transparent or translucent, and have high mechanical strength and fracture resistance. In addition, the compositions can be chemically tempered into glass-ceramics of even higher strength, which can be used as large substrates in a variety of applications.

A glass ceramic that contains a glass containing Si, B, Al, and Zn and aggregates. The glass has a SiO2 content of 20% by weight to 55% by weight, a B2O3 content of 15% by weight to 30% by weight, Al2O3, and ZnO, wherein a weight ratio of the SiO2 to the B2O3 (SiO2 / B2O3) is 1.21 or higher, and a weight ratio of the Al2O3 to the ZnO (Al2O3 / ZnO) is 0.8 to 1.3. A TiO2 content, a ZrO2 content, a SnO2 content, and a SrO content in the glass each are 0% by weight to 5% by weight. The aggregates include 20% by weight to 50% by weight of SiO2, 1% by weight to 10% by weight of TiO2, 3% by weight or less of ZrO2, and 1% by weight or less of ZnO each relative to the weight of the glass ceramic.

This invention relates to the field of glass-ceramic technology, specifically providing a low-temperature co-fired ceramic, its preparation method, and its application. The raw materials for the low-temperature co-fired ceramic include VSBBS glass frit and ceramic frit, with the total weight of the VSBBS glass frit and ceramic frit being 100%. The mass percentages of the VSBBS glass frit and ceramic frit are 20-40% and 60-80%, respectively. The raw materials for the VSBBS glass frit, by mass percentage, include 10-30 wt% vanadium oxide, 10-30 wt% antimony oxide, 10-30 wt% barium oxide, 10-20 wt% boron oxide, and 30-50 wt% silicon oxide, with the sum of all oxides being 100%. The LTCC material obtained by this invention achieves excellent millimeter-wave dielectric properties, with a relative permittivity between 4.8 and 6.8, a dielectric loss less than or equal to 0.001, and a flexural strength of 180-230 MPa.

The application relates to the technical field of light-emitting materials, and discloses a red fluorescent glass ceramic material, which has a general chemical formula of xMgO:yAl2O3:zSiO2:mEu 2+ Wherein, x, y, z and m respectively represent the mole fraction of corresponding elements, and 0.5<=x<=3, 0.5<=y<=3.5, 2<=z<=6 and 0.005<=m<=0.08; the red fluorescent glass ceramic material is prepared by laser sintering and reduction heat treatment. The preparation method is short in time consumption and low in energy consumption; the prepared red fluorescent glass ceramic has excellent light-emitting performance under blue light excitation and can be directly used as a fluorescent conversion element.

The application relates to the technical field of transparent glass ceramic preparation, in particular to a Ca 1.46 Ti 1.38 Nb 1.11 O7 crystal phase transparent glass ceramic and a preparation method and a transparent luminescent material 1.46 Ti 1.38 Nb 1.11 O7 crystal phase transparent glass ceramic is prepared by taking calcium salt, Na salt, B source and Nb, Ti and Sb oxides as raw materials, heating the raw materials to be molten into a liquid state, performing annealing treatment after solidification forming to obtain transparent glass; the transparent glass is subjected to crystallization at 600-640 DEG C and is kept for 1-2 hours to generate Ca 1.46 Ti 1.38 Nb 1.11 O7 crystal phase, and Ca 1.46 Ti 1.38 Nb 1.11 O7 crystal phase transparent glass ceramic is obtained. By adjusting the raw material composition and the crystallization temperature, a specific crystal phase and a crystal field environment can be formed, which can provide a doping site for rare earth ions and is beneficial to improving the luminescent intensity after doping.

Glass-ceramics toughened via Zr02have high molar fractions of tetragonal Zr02and fracture toughness values greater than 1.8 MPa-m 1 / 2 The glass-ceramics can also include other minor phases, including lithium silicate, which can be beneficial for toughening or strengthening via an ion exchange process. Additional second phases can also reduce the coefficient of thermal expansion of the glass-ceramics. Methods of making such glass-ceramics are also provided.

The application discloses a production method of glass ceramic composite thermal barrier coating and relates to the technical field of thermal barrier coating materials.The production method of the glass ceramic composite thermal barrier coating is realized through a glass ceramic composite thermal barrier coating production device.The glass ceramic composite thermal barrier coating production device comprises a preparation tank, a driving mechanism is arranged in the preparation tank, a separation flushing mechanism, a ball milling mechanism, a plugging and scraping mechanism and a stirring triggering mechanism are sequentially arranged on the outer side of the driving mechanism from top to bottom, and the separation flushing mechanism divides the inner cavity of the preparation tank into an upper chamber and a lower chamber.The residual composite slurry is cleaned and discharged in a flushing and scraping cooperation mode, so that the residual amount of the composite slurry is effectively reduced, the preparation cost of the glass ceramic composite thermal barrier coating is reduced, and waste is avoided.

Dense glass-ceramic articles obtained by additive manufacturing of a glass frit are provided. A method of forming a glass frit for additive manufacturing includes: providing a mixture having at least one silicon (Si) compound, at least one calcium (Ca) compound, and at least one zirconium (Zr) compound; melting the mixture at a temperature of at least 1400 °C; cooling the mixture to room temperature to obtain a glass frit, the glass frit comprising: at least 50 wt% SiO2, at least 30 wt% CaO, and at least 10 wt% ZrO2.

The application discloses a method for removing heavy impurities in PET plastic, and relates to the technical field of plastic recycling. The method comprises the following steps: removing large impurities and ferromagnetic metal through pretreatment; centrifugally separating large specific gravity metal through a hydrocyclone; adjusting the density of a suspension to 1.4-1.6 g / cm 3 3 by using a heavy medium fluidized bed; separating medium specific gravity impurities such as glass and ceramic; recycling magnetite powder through a magnetic separator; removing fine and micro fine heavy impurities through a wave plate and a wet shaking table in series connection; and realizing stable operation through a fully-closed circulating water system and PLC automatic control. The application realizes high-purity recycling of PET regenerated material and can meet the requirements of high-end applications such as fiber grade, food contact grade and the like.

The utility model discloses a glass ceramic toughening furnace inner bag structure, and this device aims at solving the operation of dismounting and reinstallation of prior art is complex and time -consuming and laborsaving, and dust and impurity and other pollutants carried in air can easily attach on the surface of glass ceramic product or enter internal structure, the device includes the frame, and the upper side wall center of frame one side is equipped with the control panel, and the center of frame front end surface and the center of back end surface are all equipped with the protection structure, and the inner bag dismounting and installing structure is equipped in the inner side wall of frame, and the center of frame upper end surface and the center of lower end surface are all equipped with the air inlet structure, the utility model discloses, realized the convenient operation of inner bag when installing and dismounting, shortened the downtime of equipment due to the problem of inner bag, can control the flow direction and distribution of furnace gas flexibly, optimized the furnace atmosphere field, made glass ceramic in more uniform, suitable atmosphere environment and carried out the toughening treatment, significantly improved the toughening quality and consistency of product.

The invention relates in general to composite plates made of glass or glass-ceramic, in particular those that are at least partially coated with a layer, to a method for producing such plates and to their use.

DEPCT68 Planar glass-ceramic products have a primary surface (first surface), a secondary surface (second surface), and... Of the two main surface edges, at least one surface of a glass-ceramic product has a textured appearance. The hybrid RMS mean square root roughness of the surface is between 4.4 degrees and 11 degrees fabrication. It also relates to the methods used in the production of such glass-ceramic products;

An embodiment of a glass-based article is disclosed, the article comprising a first surface defining a thickness (t) of about 3 mm or less (e.g., about 1 mm or less) and a second surface opposite to the first surface, and a stress profile, wherein all points on the stress profile for thicknesses ranging from about 0.t to 0.3.t and greater than 0.7.t contain tangents less than about -0.1 MPa / μm or greater than about 0.1 MPa / μm. In some embodiments, the glass-based article comprises a non-zero metal oxide concentration varying along at least a portion of the thickness (e.g., 0.t to about 0.3.t). In some embodiments, the concentration of the metal oxide or alkali metal oxide decreases from the first surface to a location between the first and second surfaces, and increases from said location to the second surface. The metal oxide concentration throughout the thickness may be about 0.05 mol% or greater, or about 0.5 mol% or greater. Methods for forming these glass-based articles are also disclosed.

The present application relates to the technical field of glass-ceramics, and in particular to a high-lithium-content glass-ceramic, a chemically strengthened glass-ceramic, and a use thereof. The high-lithium-content glass-ceramic comprises a lithium disilicate crystal phase as a primary crystal phase and has a specific content range of each oxide. On the basis of the molar percentage content of each oxide in the composition of the high-lithium-content glass-ceramic, the composition of the high-lithium-content glass-ceramic satisfies: 0.20≤2.25×Li2O-8×ZrO2-0.2×CaO ≤0.41. The high-lithium-content glass-ceramic of the present application can not only achieve high-temperature chemical strengthening, avoiding the problem of "surface cracking" and / or surface "delamination" occurring in a high-temperature salt bath, but also ensure that a chemically strengthened glass-ceramic having a high stress level and high mechanical strength performance can be prepared.

This invention provides a lithium aluminum silicon glass-ceramic composite material synergistically reinforced with pre-oxidized cubic boron nitride and carbon fiber, and its preparation method. LAS powder and pre-oxidized cubic boron nitride powder are mixed uniformly, and then an aqueous dispersion containing a dispersant is added. The mixture is ball-milled to obtain a slurry, which is then uniformly coated onto carbon fiber cloth. After thorough impregnation, the slurry is dried to obtain a prepreg. Multiple layers of prepreg are stacked in the same direction to obtain a laminate, which is sintered under vacuum or an inert atmosphere. After cooling, a Cf / LAS composite material is obtained. By designing a special particle structure of "boron oxide-coated cBN core," a tight bond between the reinforcing phase and the matrix is ​​achieved, and the overall interface system of the composite material is precisely controlled, ultimately obtaining excellent comprehensive properties of high strength, high toughness, high hardness, and low wear rate.

The utility model belongs to the field of glass ceramic smelting, especially a kind of glass ceramic product's smelting furnace, it includes mounting panel and air extractor;Air extractor is fixedly installed on the mounting panel, shell is fixedly connected on the mounting panel, one end of the air extractor is sealingly connected with the shell, ring plate is movably connected on the shell, multiple installation grooves one are set up on the ring plate, multiple installation grooves one can be installed with tail gas filter screen, motor is fixedly installed on the mounting panel, the output of motor is fixedly connected with gear, installation groove two is set up on the ring plate, tooth ring is fixedly installed in the installation groove two, the gear is engagedly connected with the tooth ring.The utility model can not only realize the effect of filtering the tail gas generated by the glass ceramic smelting furnace main body by the cooperation of each component, but also can realize the effect of automatically cleaning and collecting the dust adhered on the tail gas filter screen.

The embodiment of the present application provides a high-boiling hydrogen fluoride alkene ether compound and a preparation method and application thereof, relates to the field of fluorine chemical industry and heat management technology. The hydrogen fluoride alkene ether compound provided by the embodiment of the present application has a structure shown in formula I. The hydrogen fluoride alkene ether compound provided by the embodiment of the present application has excellent environmental protection (ODP value is 0, and GWP value is less than 100) and high boiling point (> 150 DEG C), thereby having a wide adaptive temperature range. Moreover, the hydrogen fluoride alkene ether compound has excellent material compatibility, has no corrosiveness to various metals, high polymer materials and glass ceramic materials; has low low-temperature viscosity; has excellent insulation performance and good high-temperature resistance. The hydrogen fluoride alkene ether compound is used as a temperature control working medium, has high efficient temperature control stability advantages, and can achieve the purpose of energy saving and consumption reduction. The embodiment of the present application provides a preparation method of the hydrogen fluoride alkene ether compound, raw materials are easy to obtain, the process is simple, the yield is high, and excellent cost advantages are achieved.

This utility model discloses a commercial induction cooker structure, including a workbench, a stainless steel annular column fixed in the middle of the top surface of the workbench, a control circuit board and an electromagnetic coil structure fixed inside the workbench, a switch panel on the front of the workbench, a base plate fixed to the bottom of the workbench, and at least one cooling fan fixed on the base plate; the electromagnetic coil structure includes a stainless steel coil base, an electromagnetic coil fixed inside the stainless steel coil base, and a glass-ceramic panel on the top surface of the stainless steel coil base; several Z-shaped support plates are arranged between the stainless steel coil base and the top and bottom surfaces of the workbench. This utility model has a reasonable structural design, improving the ease of assembly and disassembly of the electromagnetic coil structure, and also improving the overall load-bearing capacity, temperature and corrosion resistance, and facilitating cleaning and maintenance. The stainless steel coil base is connected by Z-shaped support plates, facilitating inspection and maintenance, and the cooling fan helps improve the overall heat dissipation performance of the workbench.

The lithium-ion conductive glass ceramic precursor has a compositional ratio of P, Al, Ge, and Li satisfies a compositional ratio represented by a compositional formula of Li1+xAlxGe2-x-zMzP3O12 (x=0.2 to 0.6, z=0 to 0.1, and M is one or more selected from the group consisting of Zr, Ti, Sn, and Si). When particles of the lithium-ion conductive glass ceramic precursor that have passed through a mesh with an aperture size of 106 μm are sintered and crystallized at a temperature of 700° C. or lower, an amount of moisture released at 550 to 700° C. is 60 ppm or less per the lithium-ion conductive glass ceramic precursor.

Method (1) for laser processing of a glass or glass-ceramic element (2), in which: - the laser beam (7) of an ultrashort pulse laser (10) is concentrated to an elongated focus in the glass or glass-ceramic element (2) by means of a focusing optic (3), wherein: - a pulse power of the ultrashort pulse laser (10) is set which is sufficient to generate filament-shaped damage (6) within the glass or glass-ceramic by means of the laser pulses focused in the glass or glass-ceramic, wherein the focusing optic (3) comprises a lens (4) arranged in the beam path of the ultrashort pulse laser (10), and wherein: - by means of a lens movement device (9), during operation of the ultrashort pulse laser (10), the lens (4) is moved transversely to the beam direction (70) so that the position of the optical axis (40) of the lens (4) relative to the position of the laser beam (7) is changed.and the movement of the lens (4) relative to the laser beam (7) deflects the laser beam (7) and thus shifts the point of impact (71) of the laser beam on the glass or glass-ceramic element (2), wherein the point of impact (71) is guided along a predetermined path forming a dividing line (12) by means of a computing device (15), wherein the lens movement device (9) is controlled by successively emitting control signals, wherein, in response to the successively emitted control signals, the lens (4) of the focusing optics (3) is moved transversely to the beam direction (70), so that the position of the optical axis (40) of the lens (4) changes relative to the position of the laser beam (7), thereby moving the point of impact (71) of the laser beam (7) on the glass or glass-ceramic element (2),wherein- by means of a movement device (17) the glass or glass-ceramic element (2) is moved relative to the ultrashort pulse laser (10) during the incident laser beam (7), so that the point of impact (71) of the laser beam (7) is guided along a predetermined path forming the dividing line (12), which is formed by the superposition of the positions set by means of the lens movement device (9) and the movement device (17), wherein- by the movement of the lens (4) deviations of the point of impact (71) from the predetermined dividing line (12) caused by undesired movement of the glass or glass-ceramic element (2) relative to the ultrashort pulse laser (10), in particular by vibrations or overshoot, during a change of direction of movement are compensated.

This invention discloses a manufacturing process for glass-ceramic products, the glass-ceramic products comprising a glass-ceramic substrate and a glaze coating applied to the glass-ceramic substrate. The manufacturing process includes: S1: providing a glass-ceramic substrate; S2: applying a glaze coating to the glass-ceramic substrate; S3: performing a firing process, the firing process including: S3a: conveying the glass-ceramic substrate with the glaze coating into a heating furnace; S3b: rapidly heating the glass-ceramic substrate to 710°C at a heating rate in the range of 20°C / min to 30°C / min; S3c: slowly heating the glass-ceramic substrate from 710°C to a maximum temperature in the range of 890°C to 930°C at a heating rate in the range of 1°C / min to 15°C / min; S3d: maintaining the maximum temperature for a certain period of time, in the range of 8 minutes to 25 minutes; and S3f: removing the glass-ceramic substrate from the heating furnace and cooling it to room temperature. The glass-ceramic products obtained according to this invention have an impact strength greater than 0.20 Nm.

This invention discloses a low-dielectric glass material, glass-ceramic, and a method for preparing TGV through-holes for integrated circuit packaging. The glass material is composed of SiO2, B2O3, Al2O3, RO, R2O, and rare earth oxides Gd2O3 / La2O3, satisfying a SiO2 / B2O3 molar ratio of 2.0~3.5 and an Al2O3 / (Gd2O3+La2O3) molar ratio of 1:1~4:1. Through the "mixed base-like effect" and lattice distortion effect generated by the Gd2O3 / La2O3 dual doping, a dielectric constant ≤4.6, dielectric loss ≤0.001, and CTE 32~50 × 10⁻⁶ are achieved. ‑7 / °C. Further heat treatment yields a glass-ceramic containing single-crystal β-CaSiO3 phase, with a flexural strength ≥250 MPa. Based on this, laser-induced modification combined with wet etching is used to form TGV vias with an aspect ratio ≥50:1, followed by pulsed copper plating for filling, and low-temperature sealing with Kovar alloy at 975°C. Slow cooling and compressive stress design suppress bubbles and cracks. This invention solves the problems of signal loss, thermal stress failure, and insufficient mechanical strength in high-frequency packaging, and is suitable for RF connectors, MEMS, and 3D system-level packaging.

Glass-ceramics toughened via Zr02have high molar fractions of tetragonal Zr02and fracture toughness values greater than 1.8 MPa-m 1 / 2 The glass-ceramics can also include other minor phases, including lithium silicate, which can be beneficial for toughening or strengthening via an ion exchange process. Additional second phases can also reduce the coefficient of thermal expansion of the glass-ceramics. Methods of making such glass-ceramics are also provided.

This application discloses a dental prosthesis and its fabrication method. The method includes: fabricating a gold alloy inner crown using a lost-wax casting process; fabricating a glass-ceramic outer crown using 3D printing or CAD / CAM cutting equipment; sequentially performing surface sandblasting, applying a metal surface treatment agent, and applying a light-curing adhesive on the bonding surface of the gold alloy inner crown; treating the bonding surface of the glass-ceramic outer crown with acid etching and a silane coupling agent; and finally bonding and fixing the glass-ceramic outer crown to the gold alloy inner crown using adhesive resin. This application uses a cold bonding system to achieve the molding of the gold alloy inner crown and the glass-ceramic outer crown, replacing the traditional high-temperature sintering process. This eliminates the potential for thermal stress at the source, avoiding problems such as porcelain chipping, inner crown oxidation, and edge deformation caused by high temperatures, while preserving the mechanical properties of the gold alloy and the aesthetic properties of the glass-ceramic.

This invention discloses an ultrasonic-enhanced selective leaching method for the resource utilization of zinc-containing baghouse dust, belonging to the field of metallurgical dust and sludge comprehensive utilization technology. The method involves low-temperature calcination to activate the zinc-iron spinel structure, combined with a weakly acidic leachate for selective leaching of zinc under mild conditions, further enhanced by ultrasonic-enhanced mass transfer, significantly improving the leaching rate and selectivity of zinc. The leachate is purified to obtain nano-zinc oxide, and the leaching residue is co-sintered with high-silicon iron tailings to form glass-ceramic materials. This invention achieves efficient zinc recovery and full-component resource utilization of the residue, avoiding the use of strong acids and the problem of iron co-dissolution. It achieves high-value comprehensive utilization of valuable metals such as zinc and iron in baghouse dust under low-energy consumption and low-pollution conditions.

The invention relates to quartz mixed crystal glass-ceramics, and to precursors thereof, which are characterized by excellent mechanical and optical properties, and which can be used in particular as dental restorative materials.

The application belongs to the technical field of oxide glass ceramics, and discloses a high-strength quasi-plastic zirconia-reinforced glass ceramic as well as a preparation method and application thereof. The glass ceramic is prepared by uniformly mixing glass raw materials, ZrO2 nano ceramic particles and fluxing agents to obtain mixed slurry, drying to obtain mixed powder, molding and cold isostatic pressing to obtain a green body, melting and heat preservation at 1200-2200 DEG C, and then cooling to obtain the glass ceramic. The glass raw materials include SiO2, MgO, Al2O3 and Re2O3. The glass ceramic has high hardness (> 7 GPa), compressive strength (≥ 4 GPa), high wear resistance and damage resistance, and a thermal expansion coefficient of (3-9) × 10 ‑6 -6, indentation toughness greater than 3 MPa·m 1 / 2 , and quasi-plastic characteristics in the fracture process, i.e. the stress-strain curve presents obvious nonlinear fracture, and can be applied in the fields of intelligent devices, semiconductors, glass coatings or precision instruments.