what are dielectric materials?
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I cant explain exactly what dielectric is, but a dielectric union is a pipe fitting to be installed were a copper pipe and iron pipe meet. A non-metal barrier keeps the copper form contacting the iron. after time, if copper and iron are in contact, the dielectric chemical reaction will corrode the iron pipe. I hope this helps. im a plumber, but not much of an author.
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nylon\n\nmade from petro chemical
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The medium of a lens is the material which it is made of.
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Copper. Or if you mean electronics (not electrical), it would be silicon (otherwise known as sand).
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Silica; it's what makes glass, and ceramics have insulative properties. Other than that, it would be petroleum products such as plastics, and vinyls. Rubber comes from a plant.
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Heat conductivity? electrical?
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You're not quite right. The dielectric of the solid (ice) is HIGHER than the dielectric of the liquid (water).\n\nAlthough water has a reasonably high dielectric constant (because the water  molecule has a dipole moment and so water can be polarized to virtually eliminate the field's effect), it still can act as a conductor because it always contains ions (OH- and H+ are always there, and also things like Cl- and Na+ are usually present) which are highly mobile.\n\nBeing conducting means that there is a current present whenever you apply an electric field, and the current means you have charge "leaking".  Yes, the reason water conducts well is because it is liquid, so ice is not a good conductor (though ice with a layer of liquid water on the outside would still probably allow quite a bit of current to flow).\n\nIn ice the water molecules have all lined themselves up in a fixed structure where the hydrogen bonds can be maximally satisfied. This means the dielectric relaxation time is higher, and the molecules can't realign themselves to a changing electric field easily. This corresponds to a higher observed dielectric constant.
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An insulator is a material containing no electrical charges. When a voltage is sent across an insulator, no charges flow, so there is no electrical voltage\n\nGenerally,all non metals materials are good insulators.Such as plastic,glass,rubber(frying pot handle)
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It's been said that any sufficiently advanced science is indistinguishable from magic.  Let's try a few of the older but lesser known ones:\n\nAbout 15/20 years ago material science came up with two new materials which are rather interesting.  The first is Aerogel, a solid which is lighter than air - it will float at room temperature.  The second is called Seagel which is about as heavy as plastic but is as strong as steel, it can be either transparent or opaque and your choice of electrially conductive or not.\n\nHow's that for a start?
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styrofoam because it is a better insulator of heat than the other materials mentioned\n\nyou do not have to be a physician to know that
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Polysulfone is a thermoplastic polycondensate is used in electric connectors. This expensive material is electroplatable, and has high strength, good toughness, good dielectric strength, and dimensional stability. The trade name of this particular thermoplastic is Ultrason, I show below some variations on its formulation, versus its dielectric strength.
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good conductors are material with very tight atomic structure. Remember you are talking about electron flow here. they flow best and easies through material with very tight atomic make up like lead gold copper aluminum silver so forth. Most good conductors are non ferrous metals. This means If you heat them up to melting point they will not get red hot first, you will see very little color change in them from solid to liquid state.
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Solid state physics, the largest branch of condensed matter physics, is the study of rigid matter, or solids. The bulk of solid state physics theory and research is focused on crystals, largely because the periodicity of atoms in a crystal — its defining characteristic —facilitates mathematical modeling, and also because crystalline materials often have electrical, magnetic, optical, or mechanical properties that can be exploited for engineering purposes
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copper and aluminum are best electricity conductors. I would say lead, since it's one of the densiest material out there. Heat is caused by vibrating atoms, denser material means the atoms are closer, and it's melting point is low too. As soon as you touch it with a hot soldering iron, the heat transfers right away and melts it.
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A thermoplastic is a material that is plastic or deformable, melts to a liquid when heated and freezes to a brittle, glassy state when cooled sufficiently.\n\nThermosetting plastics are polymer materials that cure, through the addition of energy, to a stronger form. The energy may be in the form of heat (generally above 200 degrees Celsius), through a chemical reaction (two-part epoxy, for example), or irradiation.\nThermoset materials are usually liquid, powder, or malleable prior to curing, and designed to be moulded into their final form, or used as adhesives.
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Chemicals... mostly some kinda acid. And some have nickle in it, but I donno if it'll be a solid (metal) or a liquid form. Bust one open and ya'll find out whats really in one.\n\nAnd also that's why they tell ya not to leave patteries in electonics for long periods of time with no use, cause the battery would start to leak the acid and it could fry the system.
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Polyethersulfone (PESU)\nPolyphenylene Sulfide (PPS)\nPolyvinylidinefluoride (PVDF)\n\nMany Properties of these and hundreds of materials can be found at matweb.com