221 |
Apparatus for compacting powders |
US13815312 |
2013-02-20 |
US08641980B2 |
2014-02-04 |
William H. Wiggins, Sr. |
Fluffy powders, such as calcined kaolin clays or air floated clays, can be compacted using a process which comprises applying increasing amounts of pressure to a powder moving through a confinement area. The compacted product has an improved bulk density and improved wet out and slurry incorporation times as compared to the non-compacted starting material feed. |
222 |
Light Weight Proppant With Improved Strength And Methods Of Making Same |
US13846136 |
2013-03-18 |
US20130206408A1 |
2013-08-15 |
Dilip Chatterjee; Jody Pham; Shanghua Wu; Yuming Xie; Christopher E. Coker |
Methods are described to make strong, tough, and/or lightweight glass-ceramic composites having a crystalline phase and an amorphous phase generated by viscous reaction sintering of a complex mixture of oxides and other materials. The present invention further relates to strong, tough, and lightweight glass-ceramic composites that can be used as proppants and for other uses. |
223 |
Process for compacting powders |
US13815312 |
2013-02-20 |
US20130168883A1 |
2013-07-04 |
William H. Wiggins, JR. |
Fluffy powders, such as calcined kaolin clays or air floated clays, can be compacted using a process which comprises applying increasing amounts of pressure to a powder moving through a confinement area. The compacted product has an improved bulk density and improved wet out and slurry incorporation times as compared to the non-compacted starting material feed. |
224 |
Process for compacting powders |
US12150617 |
2008-04-30 |
US08382859B2 |
2013-02-26 |
William H. Wiggins, Sr. |
Fluffy powders, such as calcined kaolin clays or air floated clays, can be compacted using a process which comprises applying increasing amounts of pressure to a powder moving through a confinement area. The compacted product has an improved bulk density and improved wet out and slurry incorporation times as compared to the non-compacted starting material feed. |
225 |
MANUFACTURE OF ARTICLES FROM FLY ASH |
US13012293 |
2011-01-24 |
US20110132233A1 |
2011-06-09 |
Obada Kayali; Karl John Shaw |
Methods of forming a shaped article having a matrix that contains sintered fly ash are disclosed that include forming a fly ash dough that includes fly ash and water. In one form a superplasticiser is added in the dough. A green article is formed in a desired shape from the fly ash dough that is subsequently fired so that the shaped article is hardened by sintering its fly ash matrix. In one form, the green article is cured under conditions of moderate heating and high humidity. A building element having a matrix of sintered fly ash is also disclosed. |
226 |
Manufacture of articles from fly ash |
US11847111 |
2007-08-29 |
US07892479B2 |
2011-02-22 |
Obada Kayali; Karl John Shaw |
Methods of forming a shaped article having a matrix that contains sintered fly ash are disclosed that include forming a fly ash dough that includes fly ash and water. In one form a superplasticiser is added in the dough. A green article is formed in a desired shape from the fly ash dough that is subsequently fired so that the shaped article is hardened by sintering its fly ash matrix. In one form, the green article is cured under conditions of moderate heating and high humidity. A building element having a matrix of sintered fly ash is also disclosed. |
227 |
Porous Ceramic Paving Material |
US12578591 |
2009-10-14 |
US20100034585A1 |
2010-02-11 |
Raymond Wu |
The disclosure is directed to a method of constructing a porous, ceramic pavement that is permeable to aqueous fluids and more resistant to acidic rainwater than concrete. The method includes selecting a porous, ceramic paving material having a compressive strength sufficient for a particular use of a surface to be paved. A base material can be selected to serve as a support for the paving material, wherein the base material is permeable to aqueous fluids. The base material is applied to the surface to be paved, and the paving material is positioned on top of the base material to provide a porous, ceramic pavement. |
228 |
Method for waste stabilisation and products obtained therefrom |
US11547746 |
2005-04-07 |
US07645095B2 |
2010-01-12 |
Tsen Meng Tang; Hsing Loong Tan; Danmei Wang |
A method is provided for heavy metal stabilisation comprising: mixing waste, comprising heavy metals, with molecular sieve with the proviso that carbon-based molecular sieve is excluded, and clay; and vitrifying the mixture. In particular, a method comprising the steps of: preparing a pre-stabilised mixture by mixing waste, comprising heavy metals, with the molecular sieve, and optionally other chemicals; mixing the pre-stabilised mixture with clay; and vitrifying the obtained mixture is provided. It also provides a product comprising heavy metals that have been stabilised into the structure of the clay-based ceramic matrix, wherein the product is a vitrified product of a mixture of at least waste, comprising heavy metals, molecular sieve (with the proviso that carbon-based molecular sieve is excluded) and clay. |
229 |
Production of ceramic, glass ceramic and other mineral materials and composite materials |
US10513307 |
2003-05-05 |
US07384470B2 |
2008-06-10 |
Olaf Binkle; Ralph Nonninger |
An inorganic binder for the production of ceramic, glass ceramic and other mineral materials and composite materials comprises at least one inorganic compound having a mean particle size of <100 nm and at least one solvent. The inorganic compounds are preferably compounds selected from the group consisting of the chalcogenides, the carbides and/or the nitrides. Further preference is given to the mean particle size being <50 nm, in particular <25 nm. The solvent is, in particular, a polar solvent, especially water. |
230 |
Method for Waste Stabilisation and Products Obtained Therefrom |
US11547746 |
2005-04-07 |
US20080108495A1 |
2008-05-08 |
Tsen Meng Tang; Hsing Loong Tan; Danmei Wang |
A method is provided for heavy metal stabilisation comprising: mixing waste, comprising heavy metals, with molecular sieve with the proviso that carbon-based molecular sieve is excluded, and clay; and vitrifying the mixture. In particular, a method comprising the steps of: preparing a pre-stabilised mixture by mixing waste, comprising heavy metals, with the molecular sieve, and optionally other chemicals; mixing the pre-stabilised mixture with clay; and vitrifying the obtained mixture is provided. It also provides a product comprising heavy metals that have been stabilised into the structure of the clay-based ceramic matrix, wherein the product is a vitrified product of a mixture of at least waste, comprising heavy metals, molecular sieve (with the proviso that carbon-based molecular sieve is excluded) and clay. |
231 |
Low temperature process for making radiopac materials utilizing industrial/agricultural waste as raw material |
US11026115 |
2005-01-03 |
US20060066013A1 |
2006-03-30 |
Sudhir Amritphale; Navin Chandra; Narayanrao Ramakrishnan |
A novel process is for making ceramic based radiopac materials useful for X-ray radiation attenuation. The process is lead as well as rare earth free and thus obviates (i) the use of conventionally used lead metal and its compounds—which are toxic in nature and are heavy weight as the density of lead is 11.34 gm/cm-2. Further the low melting points of lead (325° C.) prohibits its use in high temperature shielding structures and (ii) the use of Rare earth is restricted because they are very costly and scarcely available. The novel process of the present invention utilizes different varieties of waste as raw materials such as fly ash (from thermal power plants), Red mud (from aluminum production), Rice husk silica (an agro waste) and pyrophyllite (an underutilized clay mineral). These waste materials contain various necessary constituents required for making radiopac materials namely silicon, titanium, iron and aluminum. The presence of different mineralizers in the raw materials used and use of phosphatic binders significantly helps in obtaining the radiopac materials, at relatively low temperature of 920° C. itself and thus leads to saving of considerable heat energy. Further as the waste are generated in powder form, the use of these waste also helps in saving on the account of grinding energy. The radiopac materials obtained by the novel process of present invention are capable of withstanding ambient to high temperature and thus finds wide applications in making aprons, gloves and ceramic tiles, bricks for attenuation of X-ray radiations. The radiopac materials are useful as materials for construction of partition wall of X-ray room in hospitals, research institutes and industries. Apart from this radiopac materials an also be used and in making high temperature X-ray attenuation structures. |
232 |
Use of precipitated calcium carbonate (pcc) originating from sugar as a raw material in the ceramic industry |
US10503558 |
2002-01-31 |
US20050218546A1 |
2005-10-06 |
Anselmo Echeverria; Manuel Holst |
Due to its physicochemical and mineralogical properties, precipitated calcium carbonate (PCC) of sugar origin can be used as a raw material in the ceramic industry, particularly in the manufacture of porous ceramics. |
233 |
Process and products of chinese kaolin |
US10777328 |
2004-02-12 |
US20050178293A1 |
2005-08-18 |
Saad Nemeh; Danny Williams; Francis Yin; Randall Brown; Ernie Finch |
Disclosed are methods of processing Chinese kaolin involving providing Chinese kaolin having a desired powder size, delaminating the Chinese kaolin, pulverizing the delaminated Chinese kaolin at least two times, and heating the at least twice pulverized Chinese kaolin. Also disclosed are systems for automated processing of Chinese kaolin containing a pulverizer for pulverizing Chinese kaolin, a tester for testing and generating data of at least one parameter of the Chinese kaolin or at least one parameter of the pulverizer, a controller, operatively coupled to the pulverizer and the tester, for controlling operation of the pulverizer based on data received from the tester. |
234 |
Production of ceramic, glass ceramic and other mineral materials and composite materials |
US10513307 |
2003-05-05 |
US20050126438A1 |
2005-06-16 |
Olaf Binkle; Ralph Nonninger |
An inorganic binder for the production of ceramic, glass ceramic and other mineral materials and composite materials comprises at least one inorganic compound having a mean particle size of <100 nm and at least one solvent. The inorganic compounds are preferably compounds selected from the group consisting of the chalcogenides, the carbides and/or the nitrides. Further preference is given to the mean particle size being <50 nm, in particular <25 nm. The solvent is, in particular, a polar solvent, especially water. |
235 |
Polycrystalline translucent alumina-based ceramic material, uses, and methods |
US10034642 |
2001-12-28 |
US06878456B2 |
2005-04-12 |
Darren T. Castro; Richard P. Rusin |
A polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7. The material can be in the form of a dental mill blank, dental prosthesis or other dental article or non-dental article. |
236 |
Method for manufacturing sintered piece |
US10290160 |
2002-11-08 |
US06815384B2 |
2004-11-09 |
Tsuyoshi Ishikawa |
The method for manufacturing a sintered piece comprises preparing a molded piece of a composite including calcium phosphate compound such as hydroxyapatite, and baking the molded piece in an oxygen atmosphere to obtain the sintered piece. The oxygen concentration of the oxygen atmosphere is controlled to be not less than 25 vol %, and the relative humidity of the oxygen atmosphere is controlled to be below 30% RH. The baking is performed for 30 minutes to 8 hours at a temperature not less than 1000° C. and below a temperature at which thermal decomposition of the calcium phosphate occurs. |
237 |
Composite silica proppant material |
US10035960 |
2001-11-09 |
US06753299B2 |
2004-06-22 |
Eugene P. Lunghofer; Larry A. Wolfe |
An improved lightweight and highly permeable proppant composition for use in increasing the productivity of a gas or oil well. The proppant composition includes equal amounts by weight of uncalcined bauxite, uncalcined shale and quartz, held together with a binder formed of wollastonite and talc in an amount of less than 10% by weight of the composition. The proppant composition has an alumina content of less than 25% by weight of the composition and a silica content of over 45% by weight of the composition. |
238 |
Aluminum nitride sintered body, method for producing aluminum nitride sintered body, ceramic substrate and method for producing ceramic substrate |
US10181724 |
2002-09-27 |
US20040097359A1 |
2004-05-20 |
Yasuji
Hiramatsu; Yasutaka
Ito |
The purpose of the present invention is to provide a method for manufacturing a ceramic substrate hardly causing cracks and damages and the like attributed to pushing pressure and the like since the strength of the above-mentioned ceramic substrate is higher than that of a conventional one even in the case of manufacturing a large size ceramic substrate capable of placing a semiconductor wafer with a large diameter and the like. The present invention is to provide a method for manufacturing a ceramic substrate having a conductor formed on the surface thereof or internally thereof, including the steps of: firing a formed body containing a ceramic powder to produce a primary sintered body; and performing an annealing process to the primary sintered body at a temperature of 1400null C. to 1800null C., after the preceding step. |
239 |
High temperature amorphous composition based on aluminum phosphate |
US10362869 |
2003-07-15 |
US20040011245A1 |
2004-01-22 |
Sankar
Sambasivan; Kimberly
A.
Steiner |
A composition providing thermal, corrosion, and oxidation protection at high temperatures is based on a synthetic aluminum phosphate, in which the molar content of aluminum is greater than phosphorus. The composition is annealed and is metastable at temperatures up to 1400null C. |
240 |
Method for manufacturing sintered piece |
US10290160 |
2002-11-08 |
US20030176268A1 |
2003-09-18 |
Tsuyoshi
Ishikawa |
The method for manufacturing a sintered piece comprises preparing a molded piece of a composite including calcium phosphate compound such as hydroxyapatite, and baking the molded piece in an oxygen atmosphere to obtain the sintered piece. The oxygen concentration of the oxygen atmosphere is controlled to be not less than 25 vol %, and the relative humidity of the oxygen atmosphere is controlled to be below 30%RH. The baking is performed for 30 minutes to 8 hours at a temperature not less than 1000null C. and below a temperature at which thermal decomposition of the calcium phosphate occurs. |