A zirconia sintered body that includes a transparent zirconia portion and an opaque zirconia portion has a biaxial bending strength of 300 MPa or more. In addition, the opaque zirconia portion is configured by an opaque zirconia sintered body that is any one of a dark-colored zirconia sintered body, a medium-light-colored zirconia sintered body, and a light-colored zirconia sintered body.

A method for producing a heater with a co-sintered multilayer construction for a system for providing an inhalable aerosol, including providing at least one first substrate layer, arranging at least one first insulating layer at least in areas on the first substrate layer, arranging at least one heating element at least in areas on the first insulating layer, arranging at least one second substrate layer and at least one second insulating layer at least in areas on the heating element. The second insulating layer is arranged at least in areas on the second substrate layer, and the second insulating layer is in contact at least in areas with the heating element and/or with the first insulating layer. The method includes pressing the layers and the heating element, and firing the pressed layers in order to co-sinter the layers of the multilayer construction.

A positive electrode active material for a non-aqueous electrolyte secondary battery includes secondary particles of a lithium transition metal complex oxide as a main component. The main component is represented by a formula: Li.sub.t(Ni.sub.1-xCo.sub.x).sub.1-yMn.sub.yB.sub.P.sub.S.sub.O.sub.2, where t, x, y, , , and satisfy inequalities of 0x1, 0.00y0.50, (1x).Math.(1y)y, 0.0000.020, 0.000=0.030, 0.0000.030, and 1+3+3+2t1.30, and satisfy at least one of inequalities of 0.002, 0.006, and 0.004. The secondary particles exhibit a pore distribution, where a pore volume Vp(1) having a pore diameter of not less than 0.01 m and not more than 0.15 m satisfies an inequality of 0.035 cm.sup.3/gVp(1) and where a pore volume Vp(2) having a pore diameter of not less than 0.01 m and not more than 10 m satisfies an inequality of Vp(2)0.450 cm.sup.3/g.

A ceramic composition which can be used as a sintering aid includes 1-2 mol % of magnesium oxide (MgO), 5-15 mol % of aluminum oxide (Al.sub.2O.sub.3), 25-40 mol % of silicon dioxide (SiO.sub.2), 40-55 mol % of calcium oxide (CaO), 0.1-8 mol % of ferric oxide (Fe.sub.2O.sub.3), 0.1-2 mol % of sulfur trioxide (SO.sub.3) and 0.1-2 mol % of titanium oxide (TiO.sub.2). Alternatively, the ceramic composition includes 1-8 mol % of MgO, 5-15 mol % of Al.sub.2O.sub.3, 25-40 mol % of SiO.sub.2, 40-55 mol % of CaO, 0.1-8 mol % of Fe.sub.2O.sub.3, 0.1-2 mol % of SO.sub.3 and 0.9-2 mol % of TiO.sub.2.

A positive electrode active material for a non-aqueous electrolyte secondary battery includes secondary particles of a lithium transition metal complex oxide as a main component. The main component is represented by a formula: Li.sub.t(Ni.sub.1-xCo.sub.x).sub.1-yMn.sub.yB.sub.P.sub.S.sub.O.sub.2, where t, x, y, , , and satisfy inequalities of 0x1, 0.00y0.50, (1x).Math.(1y)y, 0.0000.020, 0.0000.030, 0.0000.030, and 1+3+3+2t1.30, and satisfy at least one of inequalities of 0.002, 0.006, and 0.004. The secondary particles exhibit a pore distribution, where a pore volume Vp(1) having a pore diameter of not less than 0.01 m and not more than 0.15 m satisfies an inequality of 0.035 cm.sup.3/gVp(1) and where a pore volume Vp(2) having a pore diameter of not less than 0.01 m and not more than 10 m satisfies an inequality of Vp(2)0.450 cm.sup.3/g.

A first circumferential wall disposed in a circumference of partition walls has no interface with the outermost circumference partition wall in a circumferential portion constituted by the partition walls whose wall thickness is larger than that of a central portion constituted by the partition walls in a central region. A maximum thickness of a total of the first circumferential wall and a second circumferential wall disposed to surround an outer side of the first circumferential wall is 1.2-3.0 mm, a difference between the maximum thickness and a minimum thickness of the total is 0.2-1.5 mm, and there is satisfied a relation, 0.5(TBTA)SB/SA100(%)9.0 in which TB and TA indicate average thicknesses (m) of the partition walls in the circumferential and central portion respectively, and SB and SA indicate areas (cm.sup.2) of the circumferential portion and the honeycomb structure in the cross section respectively.

The present disclosure provides a glass ceramic composite electrolyte comprising gadolinium doped ceria and glass composite with desired ionic conductivity in the temperature range of 400 to 600 C., suitable for applications in solid oxide fuel cells. Also disclosed is a process for the preparation of the glass ceramic composite electrolyte.

A ferrite sintered body contains Fe, Mn, Zn, Cu, and Ni. Supposing that Fe, Mn, Zn, Cu, and Ni are converted into Fe.sub.2O.sub.3, Mn.sub.2O.sub.3, ZnO, CuO, and NiO, respectively, and the sum of the contents of Fe.sub.2O.sub.3, Mn.sub.2O.sub.3, ZnO, CuO, and NiO is 100 mol %, the sum of the contents of Fe.sub.2O.sub.3 and Mn.sub.2O.sub.3 is 48.47 mol % to 49.93 mol %, the content of Mn.sub.2O.sub.3 is 0.07 mol % to 0.37 mol %, the content of ZnO is 28.95 mol % to 33.50 mol %, and the content of CuO is 2.98 mol % to 6.05 mol %. Furthermore, 102 ppm to 4,010 ppm Zr in terms of ZrO.sub.2 and 10 ppm to 220 ppm Al in terms of Al.sub.2O.sub.3 are contained per 100 parts by weight of the sum of the amounts of contained Fe.sub.2O.sub.3, Mn.sub.2O.sub.3, ZnO, CuO, and NiO.

The present invention relates to a ceramic slate with a colored jade effect and a preparation method comprising: pressing and forming raw materials containing a ceramic base material and colored glass fragments to obtain a ceramic green body; drying and firing the ceramic green body to give a ceramic slate with colored jade effect particles dispersed on the surface of the green body; wherein, the colored glass fragments account for 3 wt % to 5 wt % of the ceramic base material. Since colored glass waste instead of frits and pigments is used to prepare the ceramic slate with the colored jade effect, the ceramic slate does not have the phenomenon of pigment dispersion after high-temperature firing, and the surface of the fired ceramic slate shows a shape of micro-protrusion, so that the polished tile surface is smoother and free from pits, resulting in a better tile surface effect.

A refractory object may include a zircon body that may include at least about 0.1 wt. % and not greater than about 5.5 wt. % of an Al.sub.2O.sub.3 containing component for a total weight of the zircon body. The zircon body may further include at least about 25 wt. % and not greater than about 35 wt. % of a SiO.sub.2 component for a total weight of the zircon body.