摘要:
A glass according to the present invention is characterized by having a rate of change of 30% or less in a dielectric loss tangent at a measurement temperature of 25° C. and a measurement frequency of 2.45 GHz after being subjected to a constant temperature/constant humidity test for 1000 hours at a temperature of 85° C. and a relative humidity of 85%.
摘要:
The present invention relates to a glass substrate for a high-frequency device, which includes SiO2 as a main component, the glass substrate having a total content of alkali metal oxides in the range of 0.001-5% in terms of mole percent on the basis of oxides, the alkali metal oxides having a molar ratio represented by Na2O/(Na2O+K2O) in the range of 0.01-0.99, and the glass substrate having a total content of Al2O3 and B2O3 in the range of 1-40% in terms of mole percent on the basis of oxides and having a molar ratio represented by Al2O3/(Al2O3+B2O3) in the range of 0-0.45, in which at least one main surface of the glass substrate has a surface roughness of 1.5 nm or less in terms of arithmetic average roughness Ra, and the glass substrate has a dielectric dissipation factor at 35 GHz of 0.007 or less.
摘要:
A lead-through or connecting element is provided that includes an assembly having a carrier body of a high-temperature alloy, a functional element, and an at least partially crystallized glass. The crystallized glass is between a portion of the functional element and a portion of the carrier body. The carrier body subjects the crystallized glass to a compressive stress of greater than or equal to zero, at a temperature from at least 20° C. to more than 450° C. Also provided are a method for producing a lead-through or connecting element, the use of such a lead-through or connecting element, and to a measuring device including such a lead-through or connecting element.
摘要:
A dielectric glass composition suitable for use in an electronic device which comprises a sufficient amount of silicon dioxide to impart durability to the glass composition when subject to a humid environment, and one or more alkali metal oxides, wherein (i) the total content of the alkali metal oxides is at least about 10 wt % and no more than about 35 wt %, based upon 100% total weight of the glass composition, (ii) the median particle size (d50) of the glass composition is no more than about 5 μm, and (iii) the glass composition has a coefficient of thermal expansion of at least about 10 ppm/K and no more than about 25 ppm/K, is provided.
摘要:
A dielectric tape suitable for use in an electronic device is provided. A dielectric slip composition comprises an organic vehicle and a dielectric glass composition comprising at least about 20 wt % and no more than about 50 wt % silicon dioxide, based upon 100% total weight of the glass composition, at least about 10 wt % and no more than about 50 wt % alkali metal oxides, based upon 100% total weight of the glass composition, and at least about 1 wt % and no more than about 10 wt % of at least one transition metal oxide. A method of forming an electronic device is also provided. The method includes the steps of applying at least one dielectric tape to at least one non-planar surface of a substrate, and subjecting the at least one dielectric tape to one or more thermal treatment steps to form a dielectric layer.
摘要:
A low dielectric constant glass fiber, in mass percentage, includes 50%˜60% of SiO2, 10%˜20% of Al2O3, 12%˜20% of B2O3, 0˜4% of CaO, 4%˜10% of MgO, 0.1%˜0.5% of Na2O+K2O, 0˜0.5% of Li2O, 0.2%˜3% of F2 and 0˜0.2% of Fe2O3. Compared with the related art, the glass composition contains higher content of SiO2, which can greatly reduce dielectric properties of the glass fiber. Meanwhile, a small amount of F2 is added thereto, which not only can effectively improve the fiberizing temperature of the glass fiber but also can reduce glass viscosity and density and reduce glass refractive index and dielectric properties. In addition, lower content of CaO is further contained, but almost no alkali metal particles such as Na2O+K2O are contained, which further reduces the dielectric properties of the glass fiber.
摘要:
A glass composition according to the present invention comprises: transition metals; phosphorus; barium; and zinc, the transition metals including: vanadium; and tungsten and/or iron, the glass composition not containing substances included in the JIG level A and B lists, an softening point of the glass composition being from 430 to 530° C., an average linear expansion coefficient of the glass composition being from 6 to 9 ppm/° C. at temperatures from 30 to 250° C.
摘要:
A glass-ceramic having at least two crystal phases, wherein at least one crystal phase has a positive temperature dependence of the resonance frequency τf, at least one crystal phase has a negative temperature dependence of the resonance frequency τf and the glass-ceramic has a resulting temperature dependence of the resonance frequency τf of 0 ppm/K with a maximum deviation of +/−20 ppm/K, is described. Furthermore, a process for producing such a glass-ceramic and the use of the glass-ceramic are described.
摘要:
A glass composition of the present invention is an oxide glass, in which the percentages of elements except for oxygen (O) contained therein are as follows, in terms of atom %: the amount of boron (B) exceeds 72% but does not exceed 86%, the total amount of lithium (Li), sodium (Na), and potassium (K) is 8% to 20%, the total amount of magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba) is 1% to 8%, the amount of silicon (Si) is from 0% to less than 15%, and the amount of zinc (Zn) is from 0% to less than 2%. This glass composition further may contain molybdenum (Mo) and/or tungsten (W) in the range of more than 0% but not more than 3%.
摘要:
One embodiment of the present disclosure is directed to an insulator comprising a ceramic composition, wherein the ceramic composition comprises about 25-60% SiO2; 15-35% R2O3, wherein the R2O3 is 3-15% B2O3 and 5-25% Al2O3; 4-25% MgO+0-7% Li2O, wherein the total of MgO+Li2O is between about 6-25%; 2-20% R2O, wherein the R2O is 0-15% Na2O, 0-15% K2O, 0-15% Rb2O; 0-15% Rb2O; 0-20% Cs2O; and 4-20% F; crystalline grains, wherein the crystalline grains are substantially oriented to extend in a first direction to provide improved insulating properties in a direction perpendicular to the first direction, wherein the first direction is circumferential and the direction perpendicular to the first direction is radial; and a first zone and a second zone, wherein the first zone is in compression and the second zone is in tension.