Abstract: Disclosed is a sealing glass composition that turns, when fired at a temperature of 900-1150° C., into a crystallized glass having a thermal expansion coefficient of 80-110×10?7/° C. in the range of 50-850° C. The composition is substantially free of both boron oxide and barium oxide, and comprises SiO2: 43-53 mol %, CaO: 12-33 mol %, MgO: 12-33 mol %, La2O3: 1-7 mol %, and ZnO: 0-4.5 mol %.

Abstract: Disclosed is a sealing glass composition that turns, when fired at a temperature of 900-1150 ° C., into a crystallized glass having a thermal expansion coefficient of 80-110×10?7/° C. in the range of 50-850° C. The composition is substantially free of both boron oxide and barium oxide, and comprises SiO2: 43-53 mol %, CaO: 12-33 mol %, MgO: 12-33 mol %, La2O3: 1-7 mol %, and ZnO: 0-4.5 mol %.

Abstract: Disclosed is a glass composition that gives a high thermal expansion crystallized glass having a thermal expansion coefficient of not less than 130×10?7/° C. after its firing in the form of powder at a temperature not lower than 850° C. The glass composition is substantially free of alkali metal oxides, and contains 12-25 mass % SiO2, 10-20 mass % B2O3 (but, not including 20 mass %), 18-30 mass % CaO, 15-30 mass % MgO, and 10.5-27 mass % BaO, wherein the glass composition, when fired in the form of glass powder at a temperature of 850-1050° C., forms a crystallized glass that exhibits a thermal expansion coefficient of at least 130×10?7/° C. in the range of 50-800° C.

Abstract: Disclosed is a sealing glass composition substantially not containing B2O3 or Al2O3, which is a high-strength, high-expansive crystallizing glass composition that can be used at high temperatures of not less than 950° C. The composition substantially not containing boron oxide, alkali metal oxides or aluminum oxide, but containing, in mol %, SiO2: 40-55, BaO: 18-35, TiO2+ZrO2: 0.1-10, ZnO: 0-15, CaO: 0-20, MgO: 0-9, SrO: 0-5, and La2O3: 0-2, wherein the total content of RO (R: Mg, Ca, Sr, Ba and Zn) is at least 44 mol %, and wherein the glass composition, when fired in the form of glass powder at a temperature of 850-1050° C, turns into a crystallized glass that exhibits a thermal expansion coefficient of 90-150×10?7/° C. in the range of 50-850° C.

Abstract: Disclosed is a high-strength, high-expansion crystallized glass composition that, by being fired at not less than 850° C., can be used at high temperatures at not less than 950° C. The composition is a sealing glass composition substantially free of boron oxide and comprising the following components, in mol %, SiO2: 40-50%, ZnO: 16-30%, BaO: 5-25%, CaO: 0-25%, Al2O3: 0-5%, and RO: not less than 44% (wherein R denotes one or more species of Mg, Ca, Sr, Ba, and Zn).

Abstract: Disclosed is a sealing glass composition substantially not containing B2O3 or Al2O3, which is a high-strength, high-expansive crystallizing glass composition that can be used at high temperatures of not less than 950° C. The composition substantially not containing boron oxide, alkali metal oxides or aluminum oxide, but containing, in mol %, SiO2: 40-55, BaO: 18-35, TiO2+ZrO2: 0.1-10, ZnO: 0-15, CaO: 0-20, MgO: 0-9, SrO: 0-5, and La2O3: 0-2, wherein the total content of RO (R: Mg, Ca, Sr, Ba and Zn) is at least 44 mol %, and wherein the glass composition, when fired in the form of glass powder at a temperature of 850-1050° C., turns into a crystallized glass that exhibits a thermal expansion coefficient of 90-150×10?7/° C. in the range of 50-850° C.

Abstract: An insulating layer forming material and an insulating layer forming paste capable of forming an insulating layer on a metallic substrate without the filler and glass reacting or warpage occurring even when repeatedly fired at 850° C. or higher are provided. The insulating layer forming material containing a lead-free glass composition and an ?-quartz filler contains 17.0-40.0 wt. % of the ?-quartz filler and 60.0-83.0 wt. % of the lead-free glass composition. The ?-quartz filler has an average particle diameter (D50) of 1.0-3.5 ?m and a specific surface area of 2.5-6.5 m2/g. The lead-free glass composition includes no B2O3 and comprises a composition, in mol %, of 40.0-60.0% SiO2, 0.5-10.0% Al2O3, 20.0-45.0% MgO+CaO+SrO+BaO, 5.0-23.0% ZnO, and 0-10.0% Li2O+Na2O+K2O.

Abstract: An insulating layer forming material and an insulating layer forming paste capable of forming an insulating layer on a metallic substrate without the filler and glass reacting or warpage occurring even when repeatedly fired at 850° C. or higher are provided. The insulating layer forming material containing a lead-free glass composition and an ?-quartz filler contains 17.0-40.0 wt. % of the ?-quartz filler and 60.0-83.0 wt. % of the lead-free glass composition. The ?-quartz filler has an average particle diameter (D50) of 1.0-3.5 ?m and a specific surface area of 2.5-6.5 m2/g. The lead-free glass composition includes no B2O3 and comprises a composition, in mol %, of 40.0-60.0% SiO2, 0.5-10.0% Al2O3, 20.0-45.0% MgO+CaO+SrO+BaO, 5.0-23.0% ZnO, and 0-10.0% Li2O+Na2O+K2O.

Abstract: Disclosed is a high-strength, high-expansion crystallized glass composition that, by being fired at not less than 850° C., can be used at high temperatures at not less than 950° C. The composition is a sealing glass composition substantially free of boron oxide and comprising the following components, in mol %, SiO2: 40-50%, ZnO: 16-30%, BaO: 5-25%, CaO: 0-25%, Al2O3: 0-5%, and RO: not less than 44% (wherein R denotes one or more species of Mg, Ca, Sr, Ba, and Zn).

Abstract: There are disclosed an improved method for production of a polarizing glass having a high extinction ratio by facilitating control of the diameter of silver halide particles in a mother glass with high Ag concentration, and a polarizing glass produced by the method. The glass is a polarizing glass having dispersed and oriented geometrically anisotropic metallic silver particles at least in its surface layer, which is characterized by not containing TiO2 exceeding 1.7 wt % but containing not less than 0.4 wt % Ag, and in that Ag and halogens contained therein satisfy the following relations: the molar ratio of Ag/(Cl+Br) is 0.2 to 1.0; the molar ratio of Cl/(Cl+Br+F) 0.5 to 0.95; and the molar ratio of Br/(Cl+Br+F) 0.05 to 0.4. The method for production comprises the steps of drawing a glass containing dispersed AgClxBr1-x crystals, and then reducing it under a reducing atmosphere.

Abstract: A magnetic sensor in which magnetic leakage flaw detection can be performed with high accuracy without so reducing liftoff, and a magnetic flaw detection method and apparatus to which the magnetic sensor is applied. The magnetic sensor 50 for detecting magnetic flux generated due to a defect portion of a magnetized subject to be inspected has an E-shaped core 51 having magnetic poles (51a, 51b and 51c) arranged in the neighborhood of a steel plate (13) to be inspected, and a search coil (52) wound on the center magnetic pole (51b) of the E-shaped core for detecting the magnetic flux. An external magnetic field floating in the circumference of the E-shaped magnetic sensor passes through the opposite side magnetic poles (51a and 51c) of the E-shaped core 51 but does not cross the center magnetic pole (51b) of the E-shaped core. Accordingly, no voltage due to the external magnetic field is induced in the search coil (52), so that only the magnetic flux caused by the defect portion is detected.

Abstract: An oriented polyester film comprising ethylene terephthalate as the major repeating units, which comprises 0.01 to 1.0% by weight of silica particles and/or titanium dioxide particles having each an average particle size of 0.01 to 0.5.mu. and 0.005 to 1.0% by weight of calcium carbonate having an average particle size of 0.01 to 0.5.mu., which provides an oriented polyester film for the base film of video tape which has a flatness on the surface and has excellent slipperiness, abrasion resistance and running characteristics as well as excellent magnetic transducer characteristics.

Abstract: An oriented polyester film comprising ethylene terephthalate as the major repeating unit, which comprises particles of kaolinite and calcium carbonate uniformly dispersed therein, said kaolinite and said calcium carbonate having each an average particle size of 0.05 to 0.8 micron and being contained in such amounts as satisfying the following equations:70.ltoreq.D.times.A.ltoreq.1000 (I)1000.ltoreq.A+B.ltoreq.10000 (II)0.1.ltoreq.B/A.ltoreq.25 (III)wherein D is an average particle size (micron) of calcium carbonate, A is a content (ppm) of calcium carbonate and B is a content (ppm) of kaolinite, said oriented polyester film being excellent in flatness, slipperiness, abrasion resistance, etc. with a small number of coarse particles.

Abstract: Glass fabrics are treated with a combination of a sulfur-oxygen containing acid or peroxy acid and an inorganic or organic water-soluble salt comprising a normal salt, an acid salt or a complex salt of an inorganic acid or an organic acid with a metal of Group I or Group II of the Periodic Table and/or with an ammonium group and then colored with a basic dye.