The present invention has an object to provide piezoelectric ceramics containing no lead, having a high Curie point, and further, having excellent piezoelectric properties, particularly large Qmax. The piezoelectric ceramics contain, as a main component, a bismuth layer-structured compound having (M.sup.II.sub.1-xLn.sub.x)Bi.sub.4Ti.sub.4O.sub.15 crystals (M.sup.II is an element selected from Sr, Ba, and Ca, Ln is an element selected from lanthanoids, and x is within a range of 0<x.ltoreq.0.5...

This invention relates to a ceramic composite having a ceramic substrate and a ceramic layer disposed on the top surface of the substrate. The layer contains a multiplicity of nano-sized or micron-sized stalagmites, a multiplicity of nano-sized or micron-sized stalactites, a multiplicity of nano-sized or micron-sized columns, or a combination thereof. The invention also relates to a composition for and a method of making the ceramic composite.

The present invention relates to a ceramic material containing yttrium silicate which further contains zirconium, and to the use of said ceramic material as a heat and/or corrosion protection layer, and to a process for preparing coatings with said ceramic material.

Ceramic igniters are provided that comprise at least three zones of differing electrical resistance, preferably in sequence a first conductive zone of relatively low resistance, a power booster or enhancement zone of intermediate resistance, and a further hot or ignition zone of high resistance. Igniters of the invention can provide extremely high speeds (low time-to-temperature).

Ceramic susceptor whose wafer-retaining face has superior isothermal properties, and that is suited to utilization in apparatuses for manufacturing semiconductors and in liquid-crystal manufacturing apparatuses. In plate-shaped sintered ceramic body 1, resistive heating element 2 is formed. Fluctuation in pullback length L between sintered ceramic body outer-peripheral edge 1a and resistive heating element substantive-domain outer-peripheral edge 2a is within .+-.0.8%, while isothermal rating of...

The specification describes improved ceramic "split" tiles, that is to say tiles which are joined together back to back during firing and split apart for use. In accordance with the invention, the tiles of each pair are connected together by connecting zones or necks alternating with raised or convex and sunken or concave surface portions. The raised and sunken surface portions are present on both tiles and each raised surface portion fits in a complementary manner into a sunken portion in the o...

A bonding agent for a ceramic decalcomania comprises a balanced combination of a fast acting solvent and a moderating agent. A thickening agent may also be present. The decalcomania may be applied to the article either before or after a glaze is applied. The use of such a bonding agent for adhering a decalcomania to ceramic ware permits glaze firing without the necessity of first removing the organic material in the decalcomania and fusing the pigment to the ceramic article by prior heat treatme...

Porous, lightweight ceramic bodies having a comparatively high strength per unit of weight may be created by first preparing a mixture of hollow glass spheres, a castable ceramic composition including ceramic particles and a binder for such particles and a lubricant such as water, then casting such a mixture to a desired configuration, then allowing the mixture to set up through the action of the binder so as to form a unitary body, and then removing the lubricant from the body. If the binder us...

Monolithic ceramic capacitors are formed by producing suitered ceramic bodies with voids. The voids are produced during sintering. In the voids are distinct pillars which remain after sintering. The voids are filled with metal to form conductive electrodes.

A ceramic body that can support a required amount of catalyst component, without lowering the characteristics such as strength, manufactured without forming a coating layer and providing a high performance ceramic catalyst body that is excellent in practical utility and durability. This ceramic body is made by substituting at least one of the constituent elements of cordierite that constitutes the substrate ceramic, for example Al, with W that is the element having an empty orbit in d or f orbit...