Patents by Inventor João Manuel Calado Da Silva
João Manuel Calado Da Silva has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10202307Abstract: The present application discloses a sintered ceramic material having high fracture toughness and bending strength, which is obtained from an yttria-stabilized Zirconia powder, the powder composition for obtaining said material, sintered ceramic pieces and manufacturing process thereof. One of the solutions of the present invention discloses a sintered ceramic material which is obtained from an yttria-stabilized zirconia powder, comprising between 1.8 and 2.1 mol % yttria, wherein the sintered ceramic material has a percentage of tetragonal phase greater than 90% at room temperature, a grain size between 0.1 to 0.25 ?m, the bending strength is between 1150-2100 MPa, and simultaneously a toughness greater than 10 MPa·m1/2. This material may be applied in different sintered ceramic pieces, including pieces for the automotive sector, for diverse machinery, ornamental applications such as timepieces or pieces for biomedical applications, among others.Type: GrantFiled: March 24, 2015Date of Patent: February 12, 2019Assignee: INNOVNANO—MATERIAIS AVANCADOS, SAInventors: Joao Manuel Calado Da Silva, Nuno Miguel Pinto Neves, Helena Sofia Marques Pinto Soares, Marisa Fernanda Batouxas Rodrigues, Rosa Filomena Duarte Vitoria Calinas
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Publication number: 20160368826Abstract: The present application discloses a sintered ceramic material having high fracture toughness and bending strength, which is obtained from an yttria-stabilized Zirconia powder, the powder composition for obtaining said material, sintered ceramic pieces and manufacturing process thereof. One of the solutions of the present invention discloses a sintered ceramic material which is obtained from an yttria-stabilized zirconia powder, comprising between 1.8 and 2.1 mol % yttria, wherein the sintered ceramic material has a percentage of tetragonal phase greater than 90% at room temperature, a grain size between 0.1 to 0.25 ?m, the bending strength is between 1150-2100 MPa, and simultaneously a toughness greater than 10 MPa·m1/2. This material may be applied in different sintered ceramic pieces, including pieces for the automotive sector, for diverse machinery, ornamental applications such as timepieces or pieces for biomedical applications, among others.Type: ApplicationFiled: March 24, 2015Publication date: December 22, 2016Inventors: Joao Manuel CALADO DA SILVA, Nuno Miguel PINTO NEVES, Helena Sofia MARQUES PINTO SOARES, Marisa Fernanda BATOUXAS RODRIGUES, Rosa Filomena DUARTE VITORIA CALINAS
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Patent number: 9512043Abstract: Ceramic powders are coated with a layer of nanoparticles of multiple crystalline structures. These coatings can be obtained by means of the introduction of precursors in water in oil emulsions, which upon decomposition during its detonation, form the nanoparticles that adhere to the surface of the ceramic powder intended to coat. The later base ceramic powder can be synthesized during the emulsion detonation (W/O) or simply be directly placed in its composition. The properties of the obtained coating, such as thickness, adhesion, porosity and coated surface percentage, can be adjusted.Type: GrantFiled: October 13, 2008Date of Patent: December 6, 2016Assignee: INNOVNANO-MATERIAIS AVANCADOS, S.A.Inventors: João Manuel Calado Da Silva, Elsa Marisa Dos Santos Antunes
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Publication number: 20160145117Abstract: The present invention refers to nanocrystaline spherical ceramic oxides, to the process for the synthesis and use thereof. These oxides, obtained by detonation of a water-in-oil emulsion (W/O), besides having a spherical morphology and nanocrystallinity, show a set of complementary features, namely a particle dimension inferior to 40 ?m, bimodal particle size distribution, high purity, deagglomeration and stable crystalline stages. This set of features makes these powders particularly suitable for several applications such as coating processes, near net shape processes and, when applied in ceramics industry, they provide dense and porous ceramic objects of exceptionally high mechanical resistance.Type: ApplicationFiled: January 7, 2016Publication date: May 26, 2016Inventors: João Manuel Calado Da Silva, Elsa Marisa Dos Santos Antunes
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Patent number: 9327257Abstract: The present invention refers to a continuous process for in secco nanomaterial synthesis from the emulsification and detonation of an emulsion. The said process combines the simultaneous emulsification and detonation operations of the emulsion, thus assuring a production yield superior to 100 kg/h. When guaranteeing that the sensitization of the emulsion occurs mainly upon its feeding into the reactor, it is possible to avoid the accumulation of any class-1 substances along the entire synthesis process, thus turning it into an intrinsically safe process. Afterwards, dry collection of the nanomaterial avoids the production of liquid effluents, which are very difficult to process. Given that there's neither accumulation nor resort to explosive substances along the respective stages, the process of the present invention becomes a safe way of obtaining nanomaterial, thus allowing it to be implemented in areas wherein processes with hazardous substance aid are not allowed.Type: GrantFiled: October 18, 2011Date of Patent: May 3, 2016Assignee: INNOVNANO—MATERIAIS AVANCADOS, S.A.Inventors: Sílvio Manuel Pratas Da Silva, João Manuel Calado Da Silva
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Patent number: 9249020Abstract: The present invention refers to nanocrystalline spherical ceramic oxides, to the process for the synthesis and use thereof. These oxides, obtained by detonation of a water-in-oil emulsion (W/O), besides having a spherical morphology and nanocrystallinity, show a set of complementary features, namely a particle dimension inferior to 40 ?m, bimodal particle size distribution, high purity, deagglomeration and stable crystalline stages. This set of features makes these powders particularly suitable for several applications such as coating processes, near net shape processes and, when applied in ceramics industry, they provide dense and porous ceramic objects of exceptionally high mechanical resistance.Type: GrantFiled: September 26, 2008Date of Patent: February 2, 2016Assignee: CUF-COMPANHIA UNIAO FABRIL, SGPS, S.A.Inventors: João Manuel Calado Da Silva, Elsa Marisa Dos Santos Antunes
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Patent number: 9115001Abstract: The present invention refers to a nanomaterial synthesis process from the decomposition and subsequent reaction among common and economical insoluble precursors, or precursors which hydrolyze in contact with water, which are incorporated in the internal phase of an emulsion. These insoluble precursors are introduced in the internal phase of an emulsion, then being subject to decomposition and subsequent reaction in the solid state, under shockwave effect during the detonation of the emulsion, the nanomaterial with the intended structure being in the end obtained. The process of the present invention therefore allows obtaining a wide range of nanomaterial as composites or binary, ternary structures or higher structures, with small-sized homogenous primary particles, applicable to several technological fields.Type: GrantFiled: October 14, 2011Date of Patent: August 25, 2015Assignee: Innovnano—Materiais A vançados, S.A.Inventors: Elsa Marisa Dos Santos Antunes, João Manuel Calado Da Silva, Ana Lúcia Costa Lagoa
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Patent number: 8557215Abstract: The disclosed subject concerns nanometric-sized ceramic materials in the form of multiple crystalline structures, composites, or solid solutions, the process for their synthesis, and uses thereof. These materials are mainly obtained by detonation of two water-in-oil (W/O) emulsions, one of which is prepared with precursors in order to present a detonation regime with temperature lower than 2000° C., and they present a high chemical and crystalline phase homogeneity, individually for each particle, as well as a set of complementary properties adjustable according to the final applications, such as a homogeneous distribution of the primary particles, very high chemical purity level, crystallite size below 50 nm, surface areas by mass unit between 25 and 500 m2/g, and true particle densities higher than 98% of the theoretical density.Type: GrantFiled: May 26, 2009Date of Patent: October 15, 2013Assignee: Innovnano—Materiais Avançados, S.A.Inventors: João Manuel Calado Da Silva, Elsa Marisa Dos Santos Antunes
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Publication number: 20130251623Abstract: The present invention refers to a continuous process for in secco nanomaterial synthesis from the emulsification and detonation of an emulsion. The said process combines the simultaneous emulsification and detonation operations of the emulsion, thus assuring a production yield superior to 100 kg/h. When guaranteeing that the sensitization of the emulsion occurs mainly upon its feeding into the reactor, it is possible to avoid the accumulation of any class-1 substances along the entire synthesis process, thus turning it into an intrinsically safe process. Afterwards, dry collection of the nanomaterial avoids the production of liquid effluents, which are very difficult to process. Given that there's neither accumulation nor resort to explosive substances along the respective stages, the process of the present invention becomes a safe way of obtaining nanomaterial, thus allowing it to be implemented in areas wherein processes with hazardous substance aid are not allowed.Type: ApplicationFiled: October 18, 2011Publication date: September 26, 2013Applicant: INNOVNANO-MATERIAIS AVANÇADOS, S.A.Inventors: Sílvio Manuel Pratas Da Silva, João Manuel Calado Da Silva
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Publication number: 20130224488Abstract: The present invention refers to a nanomaterial synthesis process from the decomposition and subsequent reaction among common and economical insoluble precursors, or precursors which hydrolyze in contact with water, which are incorporated in the internal phase of an emulsion. These insoluble precursors are introduced in the internal phase of an emulsion, then being subject to decomposition and subsequent reaction in the solid state, under shockwave effect during the detonation of the emulsion, the nanomaterial with the intended structure being in the end obtained. The process of the present invention therefore allows obtaining a wide range of nanomaterial as composites or binary, ternary structures or higher structures, with small-sized homogenous primary particles, applicable to several technological fields.Type: ApplicationFiled: October 14, 2011Publication date: August 29, 2013Applicant: INNOVNANO - MATERIAIS AVANCADOS, S.A.Inventors: Elsa Marisa Dos Santos Antunes, João Manuel Calado Da Silva, Ana Lúcia Costa Lagoa
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Publication number: 20110183833Abstract: The disclosed subject matter relates to ceramic powders coated with a layer of nanoparticles of multiple crystalline structures and processes for obtaining the same. These coatings can be obtained by means of the introduction of precursors in water in oil emulsions, which upon decomposition during its detonation, form the nanoparticles that adhere to the surface of the ceramic powder intended to coat. The later base ceramic powder can be synthesized during the emulsion detonation (W/O) or simply be directly placed in its composition. The properties of the obtained coating, such as thickness, adhesion, porosity and coated surface percentage, can be adjusted according to the application desired. The ceramic powders coated can applicable to several types of areas of nanotechnology, such as electronics, biomedicine, chemistry, ceramics, energy industries, and the like.Type: ApplicationFiled: October 13, 2008Publication date: July 28, 2011Inventors: João Manuel Calado Da Silva, Elsa Marisa Dos Santos Antunes
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Publication number: 20110129670Abstract: The disclosed subject concerns nanometric-sized ceramic materials in the form of multiple crystalline structures, composites, or solid solutions, the process for their synthesis, and uses thereof. These materials are mainly obtained by detonation of two water-in-oil (W/O) emulsions, one of which is prepared with precursors in order to present a detonation regime with temperature lower than 2000° C., and they present a high chemical and crystalline phase homogeneity, individually for each particle, as well as a set of complementary properties adjustable according to the final applications, such as a homogeneous distribution of the primary particles, very high chemical purity level, crystallite size below 50 nm, surface areas by mass unit between 25 and 500 m2/g, and true particle densities higher than 98% of the theoretical density.Type: ApplicationFiled: May 26, 2009Publication date: June 2, 2011Inventors: João Manuel Calado Da Silva, Elsa Marisa Dos Santos Antunes
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Publication number: 20110039103Abstract: The present invention refers to nanocrystalline spherical ceramic oxides, to the process for the synthesis and use thereof. These oxides, obtained by detonation of a water-in-oil emulsion (W/O), besides having a spherical morphology and nanocrystallinity, show a set of complementary features, namely a particle dimension inferior to 40 ?m, bimodal particle size distribution, high purity, deagglomeration and stable crystalline stages. This set of features makes these powders particularly suitable for several applications such as coating processes, near net shape processes and, when applied in ceramics industry, they provide dense and porous ceramic objects of exceptionally high mechanical resistance.Type: ApplicationFiled: September 26, 2008Publication date: February 17, 2011Inventor: Joao Manuel CALADO DA SILVA