摘要:
An electrically conductive ceramics comprises a compound containing at least one element belonging to the Group 3A of the periodic table and TiO2−x (0
摘要:
A titania ceramic body consists of a surface thereof not exceeding 35 pores per square millimeter. The titania ceramic body is made by preparing a titania powder having a purity of at least 99.8 wt % titania and an average particle diameter of 0.5 .mu.m, compacting the powder, sintering a compact at a temperature in the range for 1000.degree. to 1300.degree. C. in air or in a non-air surrounding gas under ordinary pressure to produce a sintered body, hot isostatic pressing treating the sintered body in argon at a temperature of from 800.degree. C. to below temperature carried out in above sintering step under pressure of at least 500 kg/cm2, and then grinding and polishing the hot isostatic pressing treated body.
摘要:
A ceramic substrate for a hard disc, a thin film chip capacitor, and hybrid ICs, and a suction carrier for a substrate is constituted by using a titanium oxide or aluminum oxide substrate having an extremely small number of pores having diameters of 3 .mu.m or more on the substrate surface. The substrate is produced by baking highly purified titanium oxide fine powder or highly purified aluminum oxide fine powder in the air, an inert atmosphere or a reducing atmosphere (at 1,100.degree. C. to 1,300.degree. C. for the former and at 1,200.degree. to 1,400.degree. C. for the latter) and HIP treating the baked material.
摘要:
A ceramic mirror having a maximum surface flatness of 1 .mu.m and/or a maximum centerline average height of 1 nm as measured by the laser interference method, and a method of manufacturing a ceramic mirror by compacting a titanium oxide powder having an average particle diameter no greater than 1 .mu.m and a purity of at least 99% and then sintering the compact in an ordinary, inert, vacuum, or reducing atmosphere at a temperature between 1000.degree. and 1300.degree. C. The sintering pressure may be a minimum of 50 kg/cm.sup.2. After sintering, the product may be further treated by hot isostatic pressing (HIP) in an Ar atmosphere at 1000.degree. C. and a pressure of 1800 kg/cm.sup.2. The sintered bodies are then surface ground or lapped to produce ceramic mirrors having the above characteristics for use in laser and X-ray apparatuses, cameras, and other precision optical instruments.
摘要:
A hard coat layer on which adhered fingerprints are inconspicuous is provided. The hard coat layer 1 consists of a cured product. The cured product is formed by curing a curable composition by irradiating it with an ultraviolet ray. The curable composition contains a curable resin. The curable resin contains reactive monomers. The reactive monomers contain an isocyanuric acid derivative. The isocyanuric acid derivative is preferably tri(meth)acrylate of an ethylene oxide and ε-caprolactone adduct of isocyanuric acid.
摘要:
An oxide ceramic sintered body of a single component having a purity of at least 99% by weight of titania and a surface with a plurality of pores therein not exceeding 100 pores per square millimeter. The sintered ceramic body is made by preparing a raw titania powder having a purity of at least 99% titania by weight and an average maximum particle diameter of 1 .mu.m, compacting the titania powder to produce a compact, sintering the compact at a temperature in the range of about 1000.degree. C. to about 1300.degree. under ordinary pressure in air, or an inert or reducing atmosphere. The sintered ceramic body may be hot isostatic pressure treated below the sintering temperature in an inert atmosphere under a pressure of at least 500 kg/cm.sup.2 to further reduce the number of pores in the surface. The number of pores in the surface is determined by pressing the sintered ceramic body in sliding contacting engagement with a polishing buff sprinkled with carbon black so that the carbon black is forced into the pores to produce black spots on the surface representing the pores, and thereafter counting the black spots by inspecting the surface under a microscope to determine the number of pores.
摘要翻译:具有至少99重量%的二氧化钛的纯度的单一成分的氧化物陶瓷烧结体以及其中具有多个孔的表面不超过100个每平方毫米的孔。 烧结陶瓷体是通过制备纯度为至少99重量%的二氧化钛和平均最大粒径为1μm的原料二氧化钛粉末制成的,压制二氧化钛粉末以制备成型体,在压缩温度 在常压下在空气中,或惰性或还原气氛中约1000℃至约1300℃的范围。 烧结陶瓷体可以在惰性气氛中在至少500kg / cm 2的压力下在烧结温度以下进行热等静压处理,以进一步减少表面中的孔数。 通过将烧结陶瓷体与喷洒有炭黑的抛光缓冲液滑动接触接合来确定表面中的孔数,使得炭黑被迫进入孔中,在表示孔的表面上产生黑点,之后 通过在显微镜下检查表面来计算黑斑以确定毛孔的数量。
摘要:
The hard coat film 1 of the present invention shows a contact angle for water of 110 degrees or smaller and a contact angle for camellia oil of 50 degrees or smaller. According to the present invention, even if fingerprints are adhered to the hard coat film 1, these fingerprints are inconspicuous. The hard coat film 1 of the present invention preferably shows a contact angle for water of 50 degrees or larger and a wet tension of 27 to 45 mN/m. With these characteristics, in addition to inconspicuousness of fingerprints, wiping-off property for fingerprints is improved.
摘要:
To provide a porous member that can suppress energy loss in a microwave band and can evenly disperse gas when used in a field requiring a high level of cleanness. The porous member is formed of porous ceramics and has a dielectric loss tangent of not more than 1×10−3 in a microwave band. A ceramic member has sintered ceramics including the porous member at a part thereof.
摘要:
A ceramic mirror having a surface flatness of no more than 1 .mu.m and/or a centerline average height of no more than 1 nm as measured by the laser interference method, is made from a titanium oxide powder having an average particle diameter of 0.5 .mu.m and a minimum purity of 99.8% by weight. The mirror also has a maximum amount of irregular reflection of incident light not exceeding 5% when the angle of projection is between 0.degree. and 90.degree. as measured by a colorimeter and is made by the process including forming a titanium oxide powder having a maximum average particle diameter of 0.5 .mu.m and a minimum purity of 99.8 wt. %, compacting the titanium oxide powder by cold isostatic pressing to produce a compact, sintering the compact of titanium oxide powder in air at a temperature of 1000.degree. C.-1300.degree. C. to produce a ceramic body, hot isostatic pressing the ceramic body after the sintering in an inert atmosphere at 800.degree. C.-1500.degree. C. under a minimum pressure of 500 kg/cm.sup.2, and machining the sintered body by surface grinding and lapping.
摘要:
A protective film structure of a metal member for use in an apparatus for manufacturing a semiconductor or the like, the protective film structure including a first coating layer of faultless aluminum oxide formed by direct anodic oxidation of a base-material metal of an aluminum alloy; and a second coating layer formed on the first coating layer and made of yttrium oxide by a plasma spraying method.