Abstract: A grain-grade zirconia toughened alumina ceramic substrate and a method for preparing the same. The ceramic substrate is prepared from alumina power (main phase) and zirconia powder (secondary phase) in a binary azeotrope of anhydrous ethanol and butanone in the presence of magnesia-alumina spinel powder (as sintering aid), phosphate ester (as dispersant), polyvinyl butyral (as binder) and dibutyl phthalate (as plasticizer). In a mixture of the alumina power and the zirconia powder, a volume percentage of the alumina power is 82.44-96.7%, and a volume percentage of the zirconia powder is 3.30-17.56%. The magnesia-alumina spinel powder is 0.1-4.0% by weight of the mixture of the alumina power and the zirconia powder. A particle size ratio of the alumina powder to the zirconia powder is 2.415-4.444.

Abstract: An insert may include a sintered silicon nitride including ?-Si3N4 as a main component. The area up to 0.5 mm deep from a surface of the sintered silicon nitride is a first region. The first region may include an oxygen content of less than 0.8% by mass. The first region may include ReMgSi2O5N (Re is at least one of Yb and Y). A cutting tool may include a holder that extends from a first end toward a second end and includes a pocket on a side of the first end, and the insert located at the pocket.

Abstract: A low-temperature sintered microwave dielectric ceramic material and a preparation method thereof are provided. The ceramic material includes a base material and a low-melting-point glass material; a general chemical formula of the base material is (Zn0.9Cu0.1)0.15Nb0.3(Ti0.9Zr0.1)0.55O2; a percent by weight of the low-melting-point glass material is in a range of 1 wt. % to 2 wt. %; chemical compositions of the low-melting-point glass material include A2CO3-M2O3—SiO2, A of which includes at least two of a lithium ion, a sodium ion, and a potassium ion, M of which includes at least one of a boron ion and a bismuth ion; and a sintering temperature of the ceramic material is in a range of 850° C. to 900° C. The microwave dielectric ceramic material has the advantages of low dielectric loss, simple and controllable process, etc., has good process stability, and can meet requirements for radio communication industry.

Abstract: A complex according to the present disclosure contains a ?-eucryptite crystal phase and a lithium tantalate crystal phase. In a temperature range of 0 to 50° C., a coefficient of thermal expansion calculated for each 1° C. is within 0±1 ppm/K. Calcium is contained in the lithium tantalate crystal phase. The volume ratio of the ?-eucryptite crystal phase to the lithium tantalate crystal phase is from 90:10 to 99.5:0.5.

Abstract: Disclosed are an anti-corrosion and anti-coking ceramic coating with easy state identification for a coal-fired boiler and a preparation method thereof. The ceramic coating is formed by compounding a bottom coating layer and a surface coating layer, wherein the bottom coating layer is prepared from raw materials comprising sodium silicate, lanthanum oxide, niobium pentoxide, aluminum oxide, bismuth oxide, boron oxide, zinc oxide, silicon oxide, titanium dioxide, nano whisker, titanium nitride, and graphite fluoride, and the surface coating layer is prepared from raw materials comprising sodium silicate, lanthanum oxide, niobium pentoxide, chromium oxide, aluminum oxide, bismuth oxide, boron oxide, zinc oxide, silicon oxide, graphite fluoride, titanium nitride, silicon carbide, nano whisker, and cobalt green.

Abstract: An optical nanocomposite containing optically active crystals and suitable to be drawn into fiber form, dissolved into solution and subsequently deposited as a thin film, or used as a bulk optical component. This invention integrates compositional tailoring to enable matching of optical properties (index, dispersion, do/dT), specialized dispersion methods to ensure homogeneous physical dispersion of NCs within the glass matrix during preparation, while minimizing agglomeration and mismatch of coefficient of thermal expansion. By tailoring the base glass composition's viscosity versus temperature profile, the resulting bulk nanocomposite can be further formed to create an optical fiber, while maintaining physical dispersion of NCs, avoiding segregation of the NCs.

Abstract: A dielectric composition includes main-phase particles each including a main component having a perovskite crystal structure represented by a general formula of ABO3. At least a part of the main-phase particles has a core-shell structure. The dielectric composition includes RA, RB, M, and Si. Each of A, B, RA, RB, and M is one or more elements selected from a specific element group. SRA/SRB>CRA/CRB is satisfied, where CRA is an RA content (mol %) to the main component in terms of RA2O3, and CRB is an RB content (mol %) to the main component in terms of RB2O3, in the dielectric composition, and SRA is an average RA content (mol %), and SRB is an average RB content (mol %), in a shell part of the core-shell structure.

Abstract: A dielectric ceramic composition includes a barium titanate (BaTiO3)-based base material main ingredient and an accessory ingredient, the accessory ingredient including dysprosium (Dy) and praseodymium (Pr) as first accessory ingredients. A content of the Pr satisfies 0.233 mol?Pr?0.699 mol, based on 100 mol of the barium titanate base material main ingredient.

Abstract: The present disclosure relates to a lithium ion-conducting glass ceramic which comprises a residual glass phase that is also ion-conducting, a process for the production thereof as well as its use in a battery. The glass ceramic according to the present disclosure comprises a main crystal phase which is isostructural to the NaSICon crystal phase, wherein the composition can be described with the following formula: Li1+x?yMy5+Mx3+M2?x?y4+(PO4)3?, wherein x is greater than 0 and at most 1, as well as greater than y. Y may take values of between 0 and 1. Here, the following boundary condition has to be fulfilled: (1+x?y)>1. Here, M represents a cation with the valence of +3, +4 or +5. M3+ is selected from Al, Y, Sc or B, wherein at least Al as trivalent cation is present. Independently thereof, M4+ is selected from Ti, Si or Zr, wherein at least Ti as tetravalent cation is present. Independently thereof, M5+ is selected from Nb or Ta.

Abstract: The disclosure relates to highly temperable colored glass compositions. The colored glass compositions have high coefficients of thermal expansion and high Young's moduli that advantageously absorb in the ultraviolet and/or blue wavelength ranges. Methods of making such glasses are also provided.

Abstract: A glass-ceramic article comprises a petalite crystalline phase and a lithium silicate crystalline phase. The weight percentage of each of the petalite crystalline phase and the lithium silicate crystalline phase in the glass-ceramic article are greater than each of the weight percentages of other crystalline phases present in the glass-ceramic article. The glass-ceramic article has a transmittance color coordinate in the CIELAB color space of: L*=from 20 to 90; a*=from ?20 to 40; and b*=from ?60 to 60 for a CIE illuminant F02 under SCI UVC conditions. In some embodiments, the colorant is selected from the group consisting of TiO2, Fe2O3, NiO, Co3O4, MnO2, Cr2O3, CuO, Au, Ag, and V2O5.

Abstract: ZrO2-toughened glass ceramics having high molar fractions of tetragonal ZrO2 and fracture toughness value of greater than 1.8 MPa·m1/2. The glass ceramic may also include also contain other secondary phases, including lithium silicates, that may be beneficial for toughening or for strengthening through an ion exchange process. Additional second phases may also decrease the coefficient of thermal expansion of the glass ceramic. A method of making such glass ceramics is also provided.

Abstract: The embodiments described herein relate to low temperature moldable sheet forming glass compositions and glass articles formed from the same. In various embodiments, the glass composition comprises from about 60 mol. % to about 67 mol. % SiO2, from about 6 mol. % to about 11 mol. % B2O3, from about 4.5 mol. % to about 11 mol. % Li2O, Al2O3, Na2O, and K2O. The glass composition also includes greater than about 2 mol. % RO, where RO are divalent metal oxides, and R2O from about 14 mol. % to about 20 mol. %, where R2O are alkali metal oxides. The glass composition also has a glass transition temperature Tg of less than about 500° C., a softening point of less than about 650° C., and a coefficient of thermal expansion (CTE) of less than about 85×10?7K?1.

Abstract: The use of magnesium oxide, reactive alumina and aluminium oxide as a base provides for a new erosion-resistant material upon sintering.

Abstract: A glass article may include SiO2, Al2O3, B2O3, at least one alkali oxide, and at least one alkaline earth oxide. The glass article may be capable of being strengthened by ion exchange. The glass article has a thickness t. The concentration(s) of the constituent components of the glass may be such that: 13?0.0308543*(188.5+((23.84*Al2O3)+(?16.97*B2O3)+(69.10*Na2O)+(?213.3*K2O))+((Na2O?7.274)2*(?7.3628)+(Al2O3?2.863)*(K2O?0.520)*(321.5)+(B2O3?9.668)*(K2O?0.520)*(?39.74)))/t.

Abstract: The present invention relates to a glass for chemical strengthening including, in mole percentage on an oxide basis: 60 to 72% of SiO2; 9 to 20% of Al2O3; 1 to 15% of Li2O; 0.1 to 5% of Y2O3; 0 to 1.5% of ZrO2; and 0 to 1% of TiO2, having a total content of one or more kinds of MgO, CaO, SrO, BaO and ZnO of 1 to 10%, having a total content of Na2O and K2O of 1.5 to 10%, having a total content of B2O3 and P2O5 of 0 to 10%, wherein a ratio ([Al2O3]+[Li2O])/([Na2O]+[K2O]+[MgO]+[CaO]+[SrO]+[BaO]+[ZnO]+[ZrO2]+[Y2O3]) is from 0.7 to 3, wherein a ratio [MgO])/([CaO]+[SrO]+[BaO]+[ZnO]) is from 10 to 45, and having a value M expressed by the following expression of 1,100 or more: M=?5×[SiO2]+121×[Al2O3]+50×[Li2O]?35×[Na2O]+32×[K2O]+85×[MgO]+54×[CaO]?41×[SrO]?4×[P2O5]+218×[Y2O3]+436×[ZrO2]?1180, wherein each of [SiO2], [Al2O3], [Li2O], [Na2O], [K2O], [MgO], [CaO], [SrO], [P2O5], [Y2O3], and [ZrO2] designates a content of each component in mole percentage on an oxide basis.

Abstract: A glass composition includes: Si2O, greater than 0 mol % to less than or equal to 24 mol % Al2O3, B2O3, K2O, greater than or equal to 10 mol % to less than or equal to 38 mol % MgO, Na2O, and Li2O. The glass composition may have a fracture toughness of greater than or equal 0.80 MPa?m and a Young's modulus of greater than or equal to 80 GPa to less than or equal to 120 GPa. The glass composition is chemically strengthenable. The glass composition may be used in a glass article or a consumer electronic product.

Abstract: A process for the production of a ceramic article includes the steps of: (a) preparing a particulate mixture; (b) contacting the particulate mixture to water to form a humidified mixture; (c) pressing the humidified mixture to form a green article; (d) optionally, subjecting the green article to an initial drying step; (e) optionally, glazing the green article to form a glazed green article; (f) subjecting the green article to a heat treatment step to form a hot fused article; and (g) cooling the hot fused article to form a glazed ceramic article. The particulate mixture includes from 30 wt % to 80 wt % recycled aluminium silicate material. The particulate mixture has: (i) a d50 particle size from 10 ?m to 30 ?m; (ii) a d70 particle size of less than 40 ?m; and (iii) a d98 particle size of less than 60 ?m. Steps (c) and (f), and optionally steps (d) and (e) are continuous process steps.

Abstract: A process of synthesizing a yttrium aluminum garnet (YAG) powder. The process comprises introducing powders of yttria and silica to form a powder mixture, wherein alumina is not added to the powder mixture. Milling the powder mixture in the presence of an alumina grinding media and a solvent forms a powder slurry. Processing the powder slurry forms a green compact. Calcining the green compact at a temperature of from 1100° C. to 1650° C. for greater than 8 hours in air to 50% or less theoretical density forms a YAG compact of at least 92 wt % Y3Al5O12. Milling the YAG compact, without a grinding media, and drying produces the YAG powder. Processes further include introducing a dopant to the powder mixture to produce doped YAG powder.

Abstract: A material including a body including B6OX can include lattice constant c of at most 12.318. X can be at least 0.85 and at most 1. In a particular embodiment, 0.90?X?1. In another particular embodiment, lattice constant a can be at least 5.383 and lattice constant c can be at most 12.318. In another particular embodiment, the body can consist essentially of B6OX.