Abstract: A low temperature co-fired ceramic material includes a SiO2—BaO—Al2O3-based primary component, and, as secondary components, 0.044 to 0.077 parts by weight of iron in terms of Fe2O3 and 0.30 to 0.55 parts by weight of zirconium in terms of ZrO2 relative to 100 parts by weight of the SiO2—BaO—Al2O3-based primary component. The SiO2—BaO—Al2O3-based primary component preferably includes 47% to 60% by weight of SiO2, 20% to 42% by weight of BaO, and 5% to 30% by weight of Al2O3.

Abstract: A low temperature co-fired ceramic material includes a SiO2—BaO—Al2O3-based primary component, and, as secondary components, 0.044 to 0.077 parts by weight of iron in terms of Fe2O3 and 0.30 to 0.55 parts by weight of zirconium in terms of ZrO2 relative to 100 parts by weight of the SiO2—BaO—Al2O3-based primary component. The SiO2—BaO—Al2O3-based primary component preferably includes 47% to 60% by weight of SiO2, 20% to 42% by weight of BaO, and 5% to 30% by weight of Al2O3.

Abstract: An oxide porcelain composition includes at least one metal element selected from Al, Si, Ba, B and Cr. The oxide porcelain composition contains about 11.5 weight percent to 60.0 weight percent of Al, in the form of Al2O3; about 4.0 weight percent to 70.0 weight percent of Si, in the form of SiO2; about 4.0 weight percent to 40.0 weight percent of Ba, in the form of BaO; about 1.0 weight percent to 30.0 weight percent of B, in the form of B2O3; and about 0.3 weight percent to 3.0 weight percent of Cr, in the form of Cr2O3.

Abstract: An oxide porcelain composition includes at least one metal element selected from Al, Si, Ba, B and Cr. The oxide porcelain composition contains about 11.5 weight percent to 60.0 weight percent of Al, in the form of Al2O3; about 4.0 weight percent to 70.0 weight percent of Si, in the form of SiO2; about 4.0 weight percent to 40.0 weight percent of Ba, in the form of BaO; about 1.0 weight percent to 30.0 weight percent of B, in the form of B2O3; and about 0.3 weight percent to 3.0 weight percent of Cr, in the form of Cr2O3.

Abstract: A method and device for forming a warp beam of uniform diameter by feedback control of winding tension, in which a signal obtained from local winding tensions, each corresponding to a tension of a yarn at a certain widthwise position, are utilized for adjusting the position and width of a reed so that distribution of the warp on the beam is improved and an intra-beam diameter difference is compensated. One of the signals obtained from the local winding tensions is utilized for adjusting the rotational speed of rollers so that an inter-beam diameter difference is compensated. Thus, a warp beam without intra- or inter-beam diameter difference can always be produced.