Abstract: To provide a zirconia mill blank for dental cutting and machining which has excellent machinability in a thin workpiece such as an inlay, an onlay and a veneer, and may impart high strength and high translucency to a zirconia perfect sintered body without a special sintering such as HIP treatment, and a preparing method thereof. The zirconia mill blank for dental cutting and machining has a porosity within a range of 15 to 30%.

Abstract: Process and slip for the production of ceramic shaped parts made of zirconium oxide ceramic by a 3D inkjet printing process. The slip contains zirconium oxide which is suspended in a liquid medium, wherein the slip has a zirconium oxide content of from 68 to 88 wt.-% and contains not more than 5 wt.-% organic components. The process for the production of ceramic components comprises the layered shaping and subsequent sintering of the desired component from the slip.

Abstract: A solid electrolyte includes partially stabilized zirconia in which a stabilizer forms a solid solution in zirconia. The partially stabilized zirconia includes at least monoclinic phase particles and cubic phase particles as crystal particles that configure the partially stabilized zirconia, and an abundance ratio of the monoclinic phase particle is 5 to 25% by volume. The partially stabilized zirconia includes stabilizer low-concentration phase particles of which concentration of the stabilizer at a particle center is equal to or less than 1 mol %, as the crystal particles. The stabilizer low-concentration phase particles have a particle-size distribution of number frequency thereof having a peak at which an average particle size is 0.6 to 1.0 ?m, and a particle size at 10% of a cumulative number is 0.5 ?m or greater, and of the overall low-concentration phase particles, 50% by volume or greater belong to the peak.

Abstract: Thermal barrier coatings consist of a tantala-zirconia mixture that is stabilized with two or more stabilizers. An exemplary thermal barrier coating consists of, by mole percent: about 8% to about 30% YO1.5; about 8% to about 30% YbO1.5 or GdO1.5 or combination thereof; about 8% to about 30% TaO2.5; about 0% to about 10% HfO2; and a balance of ZrO2.

Abstract: Zirconium and yttrium oxide-based composition with a specific surface area of at least 12 m 2/g following calcination at 1000° C. for 10 hours. This composition is obtained via a method wherein a mixture of zirconium and yttrium compounds is precipitated with a base; the resulting precipitate-containing medium is heated; a compound selected from anionic surfactants, non-ionic surfactants, polyethylene glycols, carboxylic acids and the salts thereof and carboxymethylated fatty alcohol ethoxylate-type surfactants is then added to said precipitate, and, finally, the precipitate is calcined. Said composition can be used as a catalyst.

Abstract: A process for providing fluoresence to a dental ceramic body by treating at least a portion of the outer surface of the dental ceramic body or a precursor thereof with a bismuth containing substance, characterized by the steps of placing the dental ceramic body or the precursor thereof into a closeable container, in particular a crucible; generating a bismuth containing atmosphere in the container and exposing at least a portion of the outer surface of the dental ceramic body or of the precursor to the bismuth containing atmosphere at a temperature above 1000° C.

Abstract: A zirconia ceramic material for use in dental applications is provided comprising an yttria-stabilized zirconia material stabilized with 5 mol % yttria to 8 mol % yttria, and methods for making a sintered body from the ceramic material. The zirconia ceramic materials exhibit both enhanced translucency and a flexural strength of at least 300 MPa, or at least 500 MPa, when fully sintered.

Abstract: Various embodiments include a dense abradable coating, a method of reducing rub damage to a turbine engine part by applying the dense abradable coating thereto, and a turbine engine part having the abradable coating thereon. Particular embodiments include a dense abradable coating including a pore-free metallic composite, a high-aluminum containing brittle alloy, and a plurality of hollow abradable particles.

Abstract: A non-aqueous solution-suspension of R2O—SiO2—B2O3 comprises in the dry state a composition of 2 to 30 weight percent R2O, wherein R2O is an alkali metal oxide; between 10 to 74 weight percent SiO2; and between 23 to 79 weight percent B2O3. Non-aqueous solution-suspensions are used to blend to give a liquid paint which, on drying, contains the composition within the range given above in the R2O—SiO2—B2O3 system. Non-aqueous bulk liquid and aerosol based spray paints are provided, with or without Boron Nitride additions, to allow the formation of tough, flexible coatings onto ferrous metals after bake-on.

Abstract: A toughened ceramic component having a residual compressive stress and methods of forming the toughened ceramic component is disclosed. The ceramic component may include an internal portion having a first coefficient of thermal expansion (CTE) and an external portion substantially surrounding the internal portion and forming an exterior surface of the ceramic component. The external portion may have a second CTE that is less than the first CTE. Additionally, the external portion may be in compressive stress.

Abstract: The present invention is directed to a porous pre-densified CeO2-stabilized ZrO2 ceramic having a density of 50.0 to 95.0%, relative to the theoretical density of zirconia, and an open porosity of 5 to 50% as well as to a densified CeO2-stabilized ZrO2 ceramic having a density of 97.0 to 100.0%, relative to the theoretical density of zirconia, and wherein the grains of the ceramic have an average grain size of 50 to 1000 nm, methods for the preparation of the pre-densified and densified ceramics and their use for the manufacture of dental restorations.

Abstract: Disclosed are an inorganic nanofiber characterized in that the average fiber diameter is 2 ?m or less, the average fiber length is 200 ?m or less, and the CV value of the fiber length is 0.7 or less; and a method of manufacturing the same. In the manufacturing method, an inorganic nanofiber sheet consisting of inorganic nanofibers having an average fiber diameter of 2 ?m or less is formed by electrospinning, and then, the inorganic nanofiber sheet is pressed using a press machine and crushed so that the average fiber length becomes 200 ?m or less, and the CV value of the fiber length becomes 0.7 or less.

Abstract: A method for producing a catalyst or catalyst precursor is described including: applying a slurry of a particulate catalyst compound in a carrier fluid to an additive layer manufactured support structure to form a slurry-impregnated support, and drying and optionally calcining the slurry-impregnated support to form a catalyst or catalyst precursor. The mean particle size (D50) of the particulate catalyst compound in the slurry is in the range 1-50 ?m and the support structure has a porosity ?0.02 ml/g.

Abstract: To provide a high-zirconia electrocast refractory in which occurrence of cracks in manufacture and occurrence of cracks in use as a furnace material is further reduced while maintaining extremely high corrosion resistance to molten glass. The high-zirconia electrocast refractory contains 96.7 to 98.5 mass % of ZrO2, 0.8 to 2.7 mass % of SiO2, 0 to 0.2 mass % of Na2O, 0.21 to 1 mass % of K2O, 0.1 to 0.4 mass % of Al2O3, and does not substantially contain B2O3, in terms of oxide, as a chemical composition, wherein contents of the Na2O and the K2O satisfy a relation of following Formula (1) 0.15 mass %?CK2O/2+CNa2O?0.6 mass %??(1) where CK2O is the content of K2O and CNa2O is the content of Na2O, and each of the contents is expressed by mass % in the refractory.

Abstract: Provided in one implementation is a method of manufacturing a three-dimensional object. The method can include depositing a substantially uniform layer of raw material onto a substrate. The raw material can include ceramic particles. The method can include selectively fusing particles of the raw material to form a first layer of the object. The method can include clearing non-fused particles of the raw material from the first layer of the object. The method can include repeating the steps of depositing a raw material, selectively fusing particles of the raw material, and clearing non-fused particles of the raw material to form additional layers of the object above the first layer.

Abstract: Metal oxide particles, such as molded particles, as well as methods of making and articles containing the same. The particles can contain at least 70 mol percent ZrO2, and can be made by a molding process.

Abstract: The invention relates to a dental milling block (1) comprising a dental article (2) having an outer surface, the dental article having been produced based on personalized data, wherein the outer surface of the dental article is at least partially covered with a surrounding material. The invention further relates to a process of producing a dental milling block, the process comprising the steps of: ?a) providing a personalized Data Set C containing geometry data of the dental article and colour data related to said geometry data, ?b) generating a layer of hardenable material on a surface, ?c) applying a colour agent to the layer of hardenable material of step b), wherein the colour agent is applied to at least some regions of those areas of the layer of hardenable material which are related to the geometry data of the dental article, ?d) consolidating the result obtained in step c) thereby obtaining an at least partially hardened layer of material.

Abstract: An article comprises a body and at least one final plasma resistant coating layer on at least one surface of the body. The at least one final plasma resistant coating layer is a mixture of a ScF3 and an initial plasma resistant coating material selected from the group consisting of YF3, Y2O3, a compound of Y4Al2O9, a solid-solution of Y2O3—ZrO2, CaF2, MgF2, SrF2, AlF3, ErF3, LaF3, NdF3, ScF3, CeF4, ZrF4, and combinations thereof. The at least one final plasma resistant coating layer has a thermal expansion coefficient that is within about 20% of the thermal expansion coefficient of the body.

Abstract: Zirconia dental ceramics exhibiting opalescence and having a grain size in the range of 10 nm to 300 nm, a density of at least 99.5% of theoretical density, a visible light transmittance at or higher than 45% at 560 nm, and a strength of at least 800 MPa.

Abstract: A sintered material includes a first material and a second material, the first material being partially stabilized ZrO2 having a crystal grain boundary or crystal grain in which 5 to 90 volume % of Al2O3 is dispersed with respect to a whole of the first material, the second material including at least one of SiAlON, silicon nitride and titanium nitride, the sintered material including 1 to 50 volume % of the first material.

Abstract: A dental block for producing a dental prosthesis comprises a green body including zirconia and having a chemical composition comprising between 6.0 wt % to 20 wt % of yttria (Y2O3). The green body is subsequently sinterable, with regular sintering in air and with no post HIP processing, to product a translucent sintered body with a total light transmittance of at least 36% to light with a wavelength of 400 nm at a thickness of 0.6 mm.

Abstract: A refractory object may include a Cr2O3 content of at least about 80 wt. % of a total weight of the refractory object, an Al2O3 content of at least about 0.7 wt. % and not greater than about 10.0 wt. % of the total weight of the refractory object, a SiO2 content of at least about 0.3 wt. % and not greater than about 5.0 wt. % of the total weight of the refractory object and a TiO2 content of at least about 1.0 wt. % and not greater than about 5.6 wt. % TiO2 of the total weight of the refractory object. The refractory object may further include an MOR of at least about 37 MPa as measured at 1200° C.

Abstract: The present invention is directed to a porous pre-densified CeO2 stabilized ZrO2 ceramic having a density of 50.0 to 95.0%, relative to the theoretical density of zirconia, and an open porosity of 5 to 50% as well as to ceramic having a density of 97.0 to 100.0%, relative to the theoretical density of zirconia, and wherein the grains of the ceramic have an average grain size of 50 to 1000 nm, methods for the preparation of the pre-densified and densified ceramics and their use for the manufacture of dental restorations.

Abstract: Provided is a zirconia sintered body having both high translucency and high strength. The zirconia sintered body includes crystal grains that include a cubic domain and a tetragonal domain, wherein a stabilizer and lanthanum is dissolved as a solid solution therein. The sintered body can be obtained by a manufacturing method including: a mixing step of obtaining a mixed powder by mixing a zirconia source, a stabilizer source, and a lanthanum source; a molding step of obtaining a green body by molding the obtained mixed powder; a sintering step of obtaining a sintered body by sintering the obtained green body at a sintering temperature of 1650° C. or higher; and a temperature lowering step of lowering the temperature from the sintering temperature to 1000° C. at a temperature lowering rate exceeding 1° C./min.

Abstract: A method for producing a thermal spray powder includes: a preparing step of preparing a powder mixture containing a first particle made from zirconia-based ceramic containing a first additive agent and a second particle made from zirconia-based ceramic containing a second additive agent, the powder mixture having a 10% cumulative particle diameter of more than 0 ?m and not more than 10 ?m; and a secondary-particle producing step of producing a plurality of secondary particles each of which includes the first particle and the second particle sintered with each other.

Abstract: A cordierite-based sintered body comprises cordierite as a primary crystal phase and LaMgAl11O19 as a secondary crystal phase, wherein a ratio ILMA (114)/IMAS (004) is in the range of 0.01 to 0.8, where the ILMA (114) denotes a peak intensity of a (114) plane of LaMgAl11O19 as measured by powder X-ray diffractometry, and the IMAS (004) denotes a peak intensity of a (004) plane of cordierite as measured by powder X-ray diffractometry. The disclosure is intended to enhance mechanical property and improve complex and fine processability for a cordierite-based sintered body without compromising low thermal expansibility, high dimensional long-term stability, high stiffness (high elastic modulus) and precision polishing characteristic.

Abstract: A process is described, for producing zirconia-based multi-phasic ceramic composite materials, comprising the steps of: providing at least one ceramic suspension by dispersing at least one ceramic zirconia powder in at least one aqueous medium to obtain at least one matrix for such composite material; providing at least one aqueous solution containing one or more inorganic precursors and adding such aqueous solution to such ceramic suspension to surface modify such ceramic zirconia powder and obtain at least one additived suspension; quickly drying such additived suspension to obtain at least one additived powder; heat treating such additived powder to obtain at least one zirconia powder coated on its surface by second phases; and forming such zirconia powder coated on its surface by second phases.

Abstract: A process for the production of a grey zirconia-based article wherein a first mixture includes a zirconia powder forming the base constituent, 4% to 15% by weight of at least one stabilizer selected from among the group of oxides including yttrium oxide, magnesium oxide and calcium oxide alone or in combination, 0.1% to 1% by weight of a vanadium oxide powder (V2O5), 0.1% to 1% by weight of a chromium oxide powder (Cr2O3) and 0.1% to 1% by weight of a silicon oxide powder (SiO2); making a second mixture including the first mixture and a binder; making a granulated mixture by conducting a granulation of the second mixture; forming a blank by giving this second granulated mixture the shape of the desired article; sintering the blank in air for at least thirty minutes at a temperature in the range of between 1250° and 1550° C.

Abstract: Zirconium oxide material and a sintered molded body produced from the material. The zirconium oxide is present in the tetragonal phase in an amount of 70 to 99.9 vol.-%. The tetragonal phase is chemically stabilized with rare-earth oxides. The sintered moldings can be used, e.g., in the medical field as implants or as dental prostheses.

Abstract: An illumination system comprising a radiation source and a monolithic ceramic luminescence converter comprising a composite material of at least one luminescent compound, and at least one non-luminescent compound, wherein the material of the non-luminescent compound comprises silicon and nitrogen, is advantageously used, when the luminescent compound comprises an rare-earth metal-activated host compound also comprising silicon and nitrogen. Shared chemical characteristics of the luminescent compound and the non-luminescent material improve phase assemblage, thermal and optical behavior. The invention relates also to a composite monolithic ceramic luminescence converter.

Abstract: An abrasive article includes a polycrystalline material comprising abrasive grains and a filler material selected from the group of materials consisting of tungstate, molybdate, vanadate, and a combination thereof. Earth-boring tools comprise a bit body and a cutting element carried by the bit body. The cutting element comprises a polycrystalline material comprising abrasive grains, a catalyst material, and a filler material selected from the group of materials consisting of tungstate, molybdate, vanadate, and a combination thereof.

Abstract: Zirconia-based particles, sols containing the zirconia-based particles, methods of making the sols and the zirconia-based particles, composites containing the zirconia-based particles in an organic matrix, and sintered bodies prepared from the zirconia-based particles are described. The zirconia-based particles are crystalline, have a primary particles size no greater than 100 nanometers, and are doped with a lanthanide element or with both a lanthanide element and yttrium.

Abstract: A ZrO2—Al2O3-based ceramic sintered compact containing tetragonal ZrO2 particles having a crystallite size of from 5 to 20 nm as a main component and having an ?-Al2O3 crystallite size of not greater than 75 nm and a relative density of not less than 99% can be produced by preparing a Y2O3 partially stabilized ZrO2—Al2O3-based powder having a molar ratio (mol %) of zirconia (ZrO2) and yttria (Y2O3) of from 96.5:3.5 to 97.5:2.5 and a mass ratio (mass %) of ZrO2 containing Y2O3 and alumina (Al2O3) of from 85:15 to 75:25, molding this powder by cold isostatic pressing, and then performing sintering to a high density by microwave sintering for 45 to 90 min in an inert gas atmosphere at 1200 to 1400° C. When performing microwave sintering, a heating rate is preferably from 5 to 20° C./min up to 600° C. and from 50 to 150° C./min at 600° C. or higher.

Abstract: Electrode materials such as LixMnO2 where 0.2<x?2 compounds for use with rechargeable lithium ion batteries can be formed by mixing LiMn2O4 compounds or manganese dioxide compounds with lithium metal or stabilized and non-stabilized lithium metal powders.

Abstract: The invention relates to kit of parts comprising a solution, a porous zirconia article, optionally application equipment, the solution comprising cation(s) of non-coloring agent(s) selected from ions of Y, Gd, La, Yb, Tm, Mg, Ca and mixtures thereof, solvent(s) for the ion(s), optionally complexing agent(s), optionally thickening agent(s), optionally organic marker substance(s), optionally additive(s), the porous zirconia article showing a N2 adsorption and/or desorption of isotherm type IV according to IUPAC classification. The invention also relates to a method for enhancing the translucency of a zirconia article comprising the steps of providing a porous zirconia article and a solution, applying the solution to at least a part of the outer surface of the porous zirconia article, optionally drying the porous zirconia article of the preceding step, sintering the porous zirconia article to obtain a zirconia ceramic article.

Abstract: A multilayer interface coating for composite material fibers includes a first coating layer deposited onto a fiber and a second coating layer deposited onto the first coating layer.

Abstract: An abrasive article, comprising a polycrystalline material comprising abrasive grains and a filler material having an average negative coefficient of thermal expansion (CTE) within a range of temperatures between about 70 K to about 1500 K. A method of forming an abrasive article, comprising preparing an abrasive material, preparing a filler material having an average negative coefficient of thermal expansion (CTE) within a range of temperatures between about 150 K to about 1500 K, and forming a polycrystalline material comprising grains of the abrasive material and the filler material.

Abstract: The disclosure provides a refractory brick system comprising a chromia refractory brick for operation in the slagging environment of an air-cooled gasifier. The chromia refractory brick comprises a ceramically-bonded porous chromia refractory having a porosity greater than 9% and having carbon deposits residing within the pores. The brick may be further comprised of Al2O3. The air-cooled gasifier generates a liquefied slag in contact with the refractory brick and generally operates at temperatures between 1250° C. and 1575° C. and pressures between 300 psi to 1000 psi, with oxygen partial pressures generally between 10?4 and 10?10 atm. The refractory brick performs without substantial chromium carbide or chromium metal formation in the low oxygen partial pressure environment. The inclusion of carbon without chromium carbide formation provides for significant mitigation of slag penetration and significantly reduced refractory wear.

Abstract: The invention relates to a dental mill blank comprising a pre-sintered porous zirconia material, the porous pre-sintered zirconia material showing a N2 adsorption of isotherm type IV according to IUPAC classification, the porous pre-sintered zirconia material having a Vickers hardness from about 25 to about 150, the dental mill blank comprising means for reversible attaching it to a machining device. The invention also relates to a process of producing a zirconia dental article comprising the steps of providing a dental mill blank comprising a porous pre-sintered zirconia material, placing the dental mill blank in a machining device, machining the porous zirconia material and to a dental article obtained by such a process.

Abstract: Ceramic shaped abrasive particles have four major sides joined by six common edges. Each one of the four major sides contacts three other of the four major sides. The six common edges have substantially the same length. Methods of making the ceramic shaped particle are disclosed. The ceramic shaped abrasive particles are useful for abrading a surface of a workpiece. An abrasive article includes the ceramic shaped abrasive particles retained in a binder.

Abstract: Provided is a machinable zirconia having high translucency as a sintered body which is formed to include a tetragonal zirconia composite powder containing 79.8 to 92 mol % ZrO2, 4.5 to 10.2 mol % Y2O3, 3.5 to 7.5 mol % Nb2O5 or 5.5 to 10.0 mol % Ta2O5, and a TiO2 nano powder which is added with a weight ratio of more than 0 wt % and up to 2.5 wt % to the composite powder, wherein a density of the sintered body is 99% or more, an average grain size of the sintered body is 2 ?m or larger, hardness of the sintered body is in a range of 4 to 10 GPa, fracture toughness of the sintered body is in a range of 9 to 14 MPa·m1/2, a strength of the sintered body is in a range of 400 to 1000 MPa.

Abstract: Shape memory and pseudoelastic martensitic behavior is enabled by a structure in which there is provided a crystalline ceramic material that is capable of undergoing a reversible martensitic transformation and forming martensitic domains, during such martensitic transformation, that have an average elongated domain length. The ceramic material is configured as an oligocrystalline ceramic material structure having a total structural surface area that is greater than a total grain boundary area in the oligocrystalline ceramic material structure. The oligocrystalline ceramic material structure includes an oligocrystalline ceramic structural feature which has an extent that is less than the average elongated domain length of the crystalline ceramic material.

Abstract: The present invention relates to a powder of molten grains of yttria-stabilized zirconia, said grains having the following chemical analysis, in weight percent on the basis of the oxides: ZrO2+HfO2: remainder up to 100%; 11.8%?Y2O3?18.6%; 0.07%?Al2O3?1.8%; TiO2?0.6%, provided that 0.5<Al2O3 0.3%?TiO2 if 0.6%<Al2O3; and other oxides: ?2.0%.

Abstract: A rare earth oxide-containing sprayed plate is prepared by thermally spraying a rare earth oxide on a support to a thickness of up to 5 mm and peeling the sprayed coating from the support. Thin plates of rare earth oxide ceramics can be prepared without molding, firing and sintering steps.

Abstract: This invention relates to high purity yttria or ytterbia stabilized zirconia powders comprising from about 0 to about 0.15 weight percent impurity oxides, from about 0 to about 2 weight percent hafnium oxide (hafnia), from about 6 to about 25 weight percent yttrium oxide (yttria) or from about 10 to about 36 weight percent ytterbium oxide (ytterbia), and the balance zirconium oxide (zirconia). Thermal barrier coatings for protecting a component such as blades, vanes and seal surfaces of gas turbine engines, made from the high purity yttria or ytterbia stabilized zirconia powders, have a density greater than 88% of the theoretical density with a plurality of verticalzA macrocracks homogeneously dispersed throughout the coating to improve its thermal fatigue resistance.

Abstract: An object of the present invention is to provide a colored translucent zirconia sintered body having red color and high translucency. The present invention relates to a zirconia sintered body, characterized by containing 6 to 30 mo % of yttria and 0.1 to 5 mol % of cerium oxide in terms of CeO2, the cerium oxide containing an oxide of trivalent cerium. The zirconia sintered body of the present invention has, in addition of high hardness, diamond luster based on high refractive index inherent in zirconia, deep red color and transparency.

Abstract: To provide a high zirconia fused cast refractory having high durability, which hardly has cracks at the time of production of the refractory, during the heating, by temperature changes during use and during the cooling at the time of suspension of operation. A high zirconia fused cast refractory which has a chemical composition comprising from 88 to 96.5 mass % of ZrO2, from 2.5 to 9.0 mass % of SiO2, from 0.4 to 1.5 mass % of Al2O3, from 0.07 to 0.26 mass % of Na2O, from 0.3 to 1.3 mass % of K2O, from 0 to 0.3 mass % by outer percentage of Li2O, at most 0.08 mass % by outer percentage of B2O3, and at most 0.08 mass % by outer percentage of P2O5, and contains B2O3+P2O5 in a content of at most 0.1 mass % by outer percentage.

Abstract: A solid solution-comprising ceramic article useful in semiconductor processing, which is resistant to erosion by halogen-containing plasmas. The solid solution-comprising ceramic article is formed from a combination of yttrium oxide, zirconium oxide, and aluminum oxide. In a first embodiment, the solid solution-comprising ceramic article is a solid, sintered body of the solid solution ceramic material. In a second embodiment, the solid solution-comprising article comprises a substrate underlying a solid solution-comprising coating.

Abstract: A solid sintered ceramic article may include a solid solution comprising Y2O3 at a concentration of approximately 30 molar % to approximately 60 molar %, Er2O3 at a concentration of approximately 20 molar % to approximately 60 molar %, and at least one of ZrO2, Gd2O3 or SiO2 at a concentration of approximately 0 molar % to approximately 30 molar %. Alternatively, the solid sintered ceramic article a solid solution comprising 40-100 mol % of Y2O3, 0-50 mol % of ZrO2, and 0-40 mol % of Al2O3.

Abstract: The invention is directed to a pulverulent compound of the formula NiaM1bM2cOx(OH)y where M1 is at least one element selected from the group consisting of Fe, Co, Zn, Cu and mixtures thereof, M2 is at least one element selected from the group consisting of Mn, Al, Cr, B, Mg, Ca, Sr, Ba, Si and mixtures thereof, 0.3?a?0.83, 0.1?b?0.5, 0.01?c?0.5, 0.01?x?0.99 and 1.01?y?1.99, wherein the ratio of tapped density measured in accordance with ASTM B 527 to the D50 of the particle size distribution measured in accordance with ASTM B 822 is at least 0.2 g/cm3·?m. The invention is also directed to a method for the production of the pulverulent compound and the use as a precursor material for producing lithium compounds for use in lithium secondary batteries.