Abstract:
Enclosed are crystallized glasses suitable for a substrate for an information recording medium such as a magnetic disc, optical disc, or optomagnetic disc, a substrate for information recording medium using such a crystallized glass substrate, and an information recording medium using such a substrate for information recording medium. The crystallized glasses are capable of providing a glass substrate having a high Young's modulus, as well as excellent mechanical strength, surface flatness, and heat resistance and having an excellent surface smoothness upon polishing. Glass substrate having an excellent surface smoothness using such a crystallized glass are also disclosed.
Abstract:
A waveguide structure includes a glass body and a waveguide pattern formed in the glass body by irradiating a predetermined track on the glass body with sufficient energy to grow a crystalline phase along the predetermined track.
Abstract:
Glass powder for a dielectric material has a nature that, when fired, diopside (CaMgSi2O6) and at least one of titanite (CaTi(SiO4)O) and titania (TiO2) are precipitated. Preferably, the glass powder has a composition including SiO2, CaO, MgO, and TiO2 and the total content of these components is 80 mass % or more. Preferably, the glass powder comprises, by mass percent, 35-65% SiO2, 10-30% CaO, 10-20% MgO, and 12-30% TiO2.
Abstract:
Provided is a substrate for information recording medium composed of such a crystallized glass as having high Young's modulus, strength and heat resistance, being excellent in surface smoothness, surface homogeneity and surface processability, as well as having a relatively low temperature of glass liquid phase and being capable of producing cheaply, and an information recording medium using this substrate.The crystallized glass substrate for information recording medium comprising 35-65 mol % of SiO2, 5-25 mol % of Al2O3, 10-40 mol % of MgO and 5-15 mol % of TiO2, in which the total amount of aforementioned composition is at least equal to or higher than 92 mol % and the main crystals are enstatite and/or its solid solution. The information recording medium having this substrate and a recording layer formed on said substrate.
Abstract:
The present invention provides a dielectric ceramic composition comprising: 30 to 90% by weight of a crystallized glass powder capable of depositing a diopside crystal, 1 to 40% by weight of a calcium titanate powder, a strontium titanate powder or a mixed powder thereof, and 0 to 60% by weight of at least one kind of a powder selected from the group consisting of Al2O3, TiO2, ZrO2, MgTiO3, BaTi4O9, La2Ti2O7, Nd2Ti2O7, Ca2Nb2O7, SrZrO3 and CaZrO3, and a dielectric ceramics obtained by firing the same.
Abstract translation:本发明提供一种电介质陶瓷组合物,其包含:30〜90重量%的能够沉积透辉石结晶的结晶玻璃粉末,1〜40重量%的钛酸钙粉末,钛酸锶粉末或其混合粉末, 和0至60重量%的至少一种选自下组的粉末:Al 2 O 3,TiO 2, ZrO 2,MgTiO 3,BaTi 4 O 9,La 2 Ti, N 2,N 2,N 2,N 2,O 2,C 2 Nb 2 O 3,SrZrO 3和CaZrO 3 3,以及通过烧结获得的电介质陶瓷 一样。
Abstract:
Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.
Abstract:
Glass powder for a dielectric material has a nature that, when fired, diopside (CaMgSi2O6) and at least one of titanite (CaTi(SiO4)O) and titania (TiO2) are precipitated. Preferably, the glass powder has a composition including SiO2, CaO, MgO, and TiO2 and the total content of these components is 80 mass % or more. Preferably, the glass powder comprises, by mass percent, 35-65% SiO2, 10-30% CaO, 10-20% MgO, and 12-30% TiO2.
Abstract:
The invention relates to a glass ceramic, wherein the initial glass comprises 30-65 percent (by weight) SiO2; 5-30 percent (by weight) Na2O; 5-30 percent (by weight) CaO, and 0-15 percent (by weight) P2O5, and wherein the main crystalline phases comprise alkali-alkaline earth-silicate and/or alkali silicate and/or alkaline earth silicate. The invention is characterized in that either a glass ceramic with a single crystalline phase 1 Na2O-2 CaO-3 SiO2 is excluded, or the crystalline size of the glass ceramic is
Abstract:
A ZrO.sub.2 -containing glass ceramic is described, the main crystalline phase of which is formed by ZrO.sub.2 and which has at least one further crystalline phase, and which can be used in particular in dentistry.
Abstract:
A low temperature firing glass-ceramic substrate comprising a borosilicate glass, .alpha.-alumina, .gamma.-alumina, and mullite crystals crystallized out in a dispersed form from the borosilicate glass and the .gamma.-alumina, and a production process of the substrate. It is an object of this invention to provide a glass-ceramic substrate, which is low in dielectric constant and dielectric loss and high in strength and is useful for multilayer wiring.