37results about "Cellulose substances" patented technology

A composition for preparing a porous interlayer dielectric thin film which includes a saccharide or saccharide derivative, a thermo-stable organic or inorganic matrix precursor, and a solvent for dissolving the two solid components. Also provided is a dielectric thin film having evenly distributed nano-pores with a diameter of less than 50 Å, which is required for semiconductor devices.

This invention is related to a reactive nanoparticular cyclodextrin derivative useful as a porogen and a low dielectric matrix, with excellent mechanical properties and uniformly distributed nanopores, manufactured by sol-gel reaction of the above reactive cyclodextrin. Furthermore, this invention also is related to an ultralow dielectric film, with uniformly distributed nanopores, a relatively high porosity of 51%, and a relatively low dielectric constant of 1.6, manufactured by thin-filming of the conventional organic or inorganic silicate precursor by using the above reactive nanoparticular cyclodextrin derivative as a porogen.

The present invention provides a nonporous highly dielectric film which can improve withstanding voltage, insulating property and dielectric constant, especially can decrease a dielectric loss at high temperatures and can be made thin, and a coating composition for forming the highly dielectric film comprising (A) a vinylidene fluoride resin, (B) a cellulose resin and (C) a solvent.

This invention provides a dielectric composition comprising a dielectric which is fireable in air at a temperature in the range of about 450° C. to about 550° C. and a conductive oxide selected from the group consisting of antimony-doped tin oxide, tin-doped indium oxide, a transition metal oxide which has mixed valence states or will form mixed valence states after firing in a nitrogen atmosphere at a temperature in the range of about 450° C. to about 550° C. and normally conducting precious metal oxides such as ruthenium dioxide, wherein the amount of conductive oxide present is from about 0.25 wt % to about 25 wt % of the total weight of dielectric and conductive oxide. This dielectric composition has reduced electrical resistance and is useful in electron field emission devices to eliminate charging of the dielectric in the vicinity of the electron emitter and the effect of static charge induced field emission.

The invention discloses a medium slurry with high acid resistance. The glass powder used in the medium slurry is obtained by tempering Bi-Si-B series glass powder at 500-600 DEG C for 20-24 hours; , β-cellulose, etc. to prepare organic carriers; chromium trioxide, cadmium trioxide, titanium dioxide, etc. are added as oxide additives to further enhance the stability of the slurry. The binder phase glass powder used in the medium slurry of the invention adds high temperature tempering on the basis of the traditional water quenching process, which can eliminate the internal stress generated in the process of smelting and ball milling, and further improve the compactness; at the same time, it is used in the preparation process of the organic carrier. Butyraldehyde oxime replaces terpineol, the prepared slurry not only has extremely high acid resistance, but also can ensure stable breakdown voltage and low encapsulation change rate, which can adapt to harsher use environments and prolong its use. It has obvious economic benefits at the same time of life.

The present invention is directed to a multilayer structure comprising: (a) a first layer containing polyester and cellulose wherein (i) the polyester is present in an amount of 0 to 50 weight percent floc and 50 to 100 weight percent fibrid, (ii) the cellulose is present in the form of cellulosic pulp fiber and; (iii) the polyester is present in an amount of 0.5 to 75 weight percent and the cellulose is present in an amount of 25 to 99 weight percent, said percentages on the basis of the polyester and cellulose and; (b) a second layer containing cellulosic pulp fiber with the proviso that the second layer does not contain polyester. The first layer may further comprise an aramid. The multilayer structure is particularly useful in a transformer.

The invention provides an anti-electromagnetic interference anti-breakage data line, belonging to the technical field of data lines. In the anti-electromagnetic interference anti-breakage data line, acarbon nanotube is a good electromagnetic shielding material, which has superior physicochemical and mechanical properties, and the excellent electromagnetic properties enable the material to exhibitgood electromagnetic shielding performance when the carbon nanotube is added into the composite material; Aramid fiber has high strength and toughness, and the carbon nanotube / aramid fiber conductivepaper has high strength, high toughness and a shielding effect, is an ideal data line coating layer material. The data of the data line provided by the embodiment shows that the anti-electromagneticinterference anti-breakage data line manufactured by the invention has electromagnetic shielding effectiveness of 39-46 dB in the frequency band of 175-1600 MHz, and can withstand bending tests for 5000-10000 times without obvious cracks.