Abstract:
Provided are methods and systems for forming piezoelectric coatings on power line cables using sol-gel materials. A cable may be fed through a container with a sol-gel material having a piezoelectric material to form an uncured layer on the surface of the cable. The layer is then cured using, for example, infrared, ultraviolet, and/or other types of radiation. The cable may be suspended in a coating system such that the uncured layer does not touch any components of the system until the layer is adequately cured. Piezoelectric characteristics of the cured layer may be tested in the system to provide a control feedback. The cured layer, which may be referred to as a piezoelectric coating, causes resistive heating at the outer surface of the cable during vibration of the cable due transmission of alternating currents and environmental factors.
Abstract:
Provided are methods and systems for distributing coating materials using simultaneous vibration and rotation. Inertial forces generated during vibration and centrifugal forces generated during rotation redistribute the coating materials previously deposited on the surface resulting in uniform and/or conformal layers. The coated surfaces may have various shapes and degrees of roughness and may be referred to as complex surfaces. An initial layer of the coating material may be deposited on a complex surface of the part using dipping, spraying, spin coating, or other like techniques. The coating material is redistributed by simultaneous rotation and vibration of the part using specifically selected process conditions, such as orientation of vibrational and rotational axes relative to the part, rotational speeds, and vibrational frequencies and amplitudes. The redistribution operation may be repeated one or more times using different process conditions to ensure uniform distribution on different portions of the complex surfaces.
Abstract:
Provided are methods and systems for distributing coating materials using simultaneous vibration and rotation. Inertial forces generated during vibration and centrifugal forces generated during rotation redistribute the coating materials previously deposited on the surface resulting in uniform and/or conformal layers. The coated surfaces may have various shapes and degrees of roughness and may be referred to as complex surfaces. An initial layer of the coating material may be deposited on a complex surface of the part using dipping, spraying, spin coating, or other like techniques. The coating material is redistributed by simultaneous rotation and vibration of the part using specifically selected process conditions, such as orientation of vibrational and rotational axes relative to the part, rotational speeds, and vibrational frequencies and amplitudes. In some embodiments, the redistribution operation may be repeated one or more times using different process conditions to ensure uniform distribution on different portions of the complex surfaces.
Abstract:
Provided are modified hybrid sol-gel precursor solutions and coatings formed from such solutions. A modified hybrid sol-gel precursor solution includes an inorganic precursor, cross-linkable inorganic-organic precursor, cross-linkable organic precursor, protic solvent, and aprotic solvent. The inorganic precursor may include a metal or metalloid and two or more hydrolysable groups. The cross-linkable inorganic-organic precursor may include a metal, hydrolysable group, and organic molecule. The cross-linkable organic precursor has another organic molecule with two or more second cross-linking groups. A combination of protic and aprotic solvents in the same solution may be used to control properties of the solutions, thermodynamics, and other processing aspects. The solution may also include nanoparticles. The nanoparticles may include functionalized surface to form covalent bonds with one or more precursors of the solution, such as a plasma treated surface. The nanoparticles may be sized to fit into the sol-gel network without substantially disturbing this network.
Abstract:
Provided are modified hybrid sol-gel precursor solutions and coatings formed from such solutions. A modified hybrid sol-gel precursor solution includes an inorganic precursor, cross-linkable inorganic-organic precursor, cross-linkable organic precursor, protic solvent, and aprotic solvent. The inorganic precursor may include a metal or metalloid and two or more hydrolysable groups. The cross-linkable inorganic-organic precursor may include a metal, hydrolysable group, and organic molecule. The cross-linkable organic precursor has another organic molecule with two or more second cross-linking groups. A combination of protic and aprotic solvents in the same solution may be used to control properties of the solutions, thermodynamics, and other processing aspects. The solution may also include nanoparticles. The nanoparticles may include functionalized surface to form covalent bonds with one or more precursors of the solution, such as a plasma treated surface. The nanoparticles may be sized to fit into the sol-gel network without substantially disturbing this network.
Abstract:
Provided are methods and systems for forming piezoelectric coatings on power line cables using sol-gel materials. A cable may be fed through a container with a sol-gel material having a piezoelectric material to form an uncured layer on the surface of the cable. The layer is then cured using, for example, infrared, ultraviolet, and/or other types of radiation. The cable may be suspended in a coating system such that the uncured layer does not touch any components of the system until the layer is adequately cured. Piezoelectric characteristics of the cured layer may be tested in the system to provide a control feedback. The cured layer, which may be referred to as a piezoelectric coating, causes resistive heating at the outer surface of the cable during vibration of the cable due transmission of alternating currents and environmental factors.
Abstract:
Provided are methods and systems for distributing coating materials using simultaneous vibration and rotation. Inertial forces generated during vibration and centrifugal forces generated during rotation redistribute the coating materials previously deposited on the surface resulting in uniform and/or conformal layers. The coated surfaces may have various shapes and degrees of roughness and may be referred to as complex surfaces. An initial layer of the coating material may be deposited on a complex surface of the part using dipping, spraying, spin coating, or other like techniques. The coating material is redistributed by simultaneous rotation and vibration of the part using specifically selected process conditions, such as orientation of vibrational and rotational axes relative to the part, rotational speeds, and vibrational frequencies and amplitudes. The redistribution operation may be repeated one or more times using different process conditions to ensure uniform distribution on different portions of the complex surfaces.
Abstract:
Provided are methods of forming stacks comprising a substrate and one or more sol-gel layers disposed on the substrate. Also provided are stacks formed by these methods. The sol-gel layers in these stacks, especially outer layers, may have a porosity of less than 1% or even less than 0.5%. In some embodiments, these layers may have a surface roughness (Ra) of less than 1 nanometers. The sol-gel layers may be formed using radiative curing and/or thermal curing at temperatures of between 400° C. and 700° C. or higher. These temperatures allow application of sol-gel layers on new types of substrates. A sol-gel solution, used to form these layers, may have colloidal nanoparticles with a size of less than 20 Angstroms on average. This small size and narrow size distribution is believed to control the porosity of the resulting sol-gel layers.
Abstract:
Provided are methods and systems for forming piezoelectric coatings on power line cables using sol-gel materials. A cable may be fed through a container with a sol-gel material having a piezoelectric material to form an uncured layer on the surface of the cable. The layer is then cured using, for example, infrared, ultraviolet, and/or other types of radiation. The cable may be suspended in a coating system such that the uncured layer does not touch any components of the system until the layer is adequately cured. Piezoelectric characteristics of the cured layer may be tested in the system to provide a control feedback. The cured layer, which may be referred to as a piezoelectric coating, causes resistive heating at the outer surface of the cable during vibration of the cable due transmission of alternating currents and environmental factors.
Abstract:
Provided are methods and systems for forming piezoelectric coatings on power line cables using sol-gel materials. A cable may be fed through a container with a sol-gel material having a piezoelectric material to form an uncured layer on the surface of the cable. The layer is then cured using, for example, infrared, ultraviolet, and/or other types of radiation. The cable may be suspended in a coating system such that the uncured layer does not touch any components of the system until the layer is adequately cured. Piezoelectric characteristics of the cured layer may be tested in the system to provide a control feedback. The cured layer, which may be referred to as a piezoelectric coating, causes resistive heating at the outer surface of the cable during vibration of the cable due transmission of alternating currents and environmental factors.