Abstract:
A sintered ceramic particle made from a ceramic material having a true density greater than 3.5 g/cc and a composition having no more than 30 weight percent silicon oxide and at least 15 weight percent iron oxide, based on the combined weight of the oxides of aluminum, iron and silicon, is disclosed. A process that utilizes an externally applied compressive force to make a ceramic particle is also disclosed.
Abstract:
Se divulga una población de partículas cerámicas que incluye diversas partículas individuales que fluyen libremente. La diversidad tiene una distribución del peso total y del tamaño de las partículas. El ancho efectivo de la distribución es la diferencia entre los tamaños de partículas d95 y d5 de la distribución. El ancho efectivo de la distribución excede los 100 micrones e incluye tres regiones contiguas y no superpues.tas que incluyen una primera región, una segunda región y una tercera región. La primera región colinda con la segunda región y la segunda región colinda con la tercera región. El ancho de la segunda región es al menos un 25% del ancho efectivo. El peso de las partículas en la segunda región no excede el 15% del peso total de las diversas partículas. El peso de las partículas en la primera región y en la tercera región excede cada una el peso de las partículas en la segunda región. También se divulgan métodos para fabricar las poblaciones de partículas cerámicas.
Abstract:
A ceramic particle with at least two microstructural phases comprising an amorphous phase, representing between 30 volume percent and 70 volume percent of the particle, and a first substantially crystalline phase comprising a S plurality of predominately crystalline regions distributed through the amorphous phase is disclosed. A process for making the ceramic particle is also disclosed.
Abstract:
Disclosed is a process for producing ceramic particles, such as proppants, that have at least 10 percent total porosity. The process includes forming a particle precursor that includes 5 percent to 30 percent of a first ceramic material and at least 40 percent of a second ceramic material, The sintering temperature of the first ceramic material may be lower than the sintering temperature of a second ceramic material. Heating the precursor to a maximum temperature above the sintering temperature of the first material and below the smntering temperature of the second material. Also disclosed is a ceramic article that has a particular combination of chemistry and alumina crystalline phase. BA. J iV14 B
Abstract:
Disclosed is a population of ceramic particles that includes a plurality of individual, free flowing particles. The plurality has a total weight and particle size distribution. The effective width of the distribution is the difference between the distribution's d95 and d5 particle sizes. The distribution's effective width exceeds 100 microns and includes three abutting and non-overlapping regions that include a first region, a second region, and a third region. The first region abuts the second region and the second region abuts the third region. The width of the second region is at least 25% of the effective width. The weight of particles in the second region does not exceed 15% of the plurality of particle's total weight. The weight of particles in the first region and the third region each exceed the weight of particles in the second region. Methods of making the populations of ceramic particles are also disclosed.
Abstract:
A sintered ceramic particle made from a ceramic material having a true density greater than 3.5 g/cc and a composition having no more than 30 weight percent silicon oxide and at least 15 weight percent iron oxide, based on the combined weight of the oxides of aluminum, iron and silicon, is disclosed. A proces that utilizes an externally applied compressive force to make a ceramic particle is also disclosed.
Abstract:
One embodiment of the present invention relates to spherical ceramic elem ents, such as proppants, for maintaining permeability in subterranean format ions to facilitate extraction of oil and gas therefrom. The strength of the ceramic element may be enhanced by combining materials having different coef ficients of thermal expansion. Methods of making the ceramic elements are al so disclosed.