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Lightness was measured as described above. Energy can also be saved by forming a multilayer coating film in a single baking based on the three-coat one-bake method.
Aluminum nitride sintered body, metal embedded article, electronic functional material and electrostatic chuck. However, the lightness was suppressed merely to N 6.
A method of producing an aluminum nitride sintered body, when sintering a powder of aluminum nitride containing metal elements of contents of not more than ppm for each metal element except for aluminum to obtain the sintered body, the sintering is effected to obtain a sintered body of a relative density of at least The particle form of the electrically conductive fillers is usually jks, acicular, fibrous or spherical. In addition, the lightness of the multilayer coating film thus produced is not satisfactory.
The Munsell chart N value was determined in the multilayer coating film having the three layers of aqueous white primer coating, clear colored coating and clear coating. In Comparative Examples 1 and 3 shown in Table 1, the raw material powders were shaped under monoaxial pressing to his preliminarily shaped bodies which were then hot press fired.
Multilayer coating films No. Examples of the polymerizable monomers used for graft polymerization include meth acrylic acid alkyl esters, meth acrylic acid alkoxy alkyl esters, glycidyl meth acrylate, 8271 of glycidyl meth acrylate and monocarboxylic acids, hydroxyalkyl meth acrylates, acrylic acid, methacrylic acid, and so on. The hydroxyl-containing monomer is a compound containing a hydroxyl group and a polymerizable unsaturated group; examples thereof include monoesterified compounds of alkylene glycols having 2 to 10 carbon atoms and meth acrylic acid such as hydroxyethyl meth acrylate, hydroxypropyl meth acrylate, hydroxybutyl meth acrylate, etc.
The hydrophilization of the polyisocyanate compound can be carried out, for example, by introducing a hydrophilic group such as a carboxyl group, sulfonic group, tertiary amino group and so on into the compound and neutralizing the compound with a neutralizing agent such as dimethylol propionic acid or like hydroxycarboxylic acid, ammonia, tertiary amine and so on.
As such additives, tungsten, titanium oxide, nickel, palladium and the like are known. However, aluminum nitride sintered bodies per se generally assumes white or gray white color, so that they are inferior in heat radiation property.
It is considered that the lightness of the sintered body was increased for the sake of the development of the crystal grains. A method for forming a coating film on a plastic jie which comprises the steps of:. Apparatus for producing semiconductor using aluminum nitride bodies as substrates. Consequently, the coating film can be electrostatically coated in an easy manner with a thermosetting clear jiss coating composition B and a thermosetting clear coating composition C.
However, this is considered due to a fact that the raw material powder prepared by the direct nitriding method is difficult to sinter without a sintering additive.
Therefore, in case of the powder of aluminum nitride containing yttria, the sintered bodies did not show a change in relative density regardless whether the powder was prepared by direct nitriding method or reduction nitriding method. Country of ref document: Examples of the polymerizable unsaturated dicarboxylic acid or the anhydride thereof are maleic acid or the anhydride thereof, itaconic acid or the anhydride thereof, citraconic acid or the anhydride thereof, and so on.
For example, before a plastic substrate is electrostatically coated, an electrically conductive primer is applied to provide the substrate with electrical conductivity. A coated plastic article obtained by the method for forming a coating film according to the above item 1.
This is considered due to the function of the sintering additive. In order to solve these problems. These amine compounds can be used singly or in combination of two or more. The amount thereof required is large, resulting in an unstable coating composition or involving high cost. Highly crosslinked polymer particles and coating compositions containing the same.
According to the inventors’ study, aluminum nitride is preferably used as the substrate for such ceramic heaters and susceptors. The js colored coating composition B provides high transparency to enable observation of the coating film of aqueous white primer A beneath the clear colored coating film. The coating film had at least one of the defects of sagging, after tack and blistering.
The coating film had considerable defects such as sagging, after tack, blistering and so on. In the same manner as in Comparative Examples 7 – 9, aluminum nitride sintered bodies of Examples 6 – 7 and Comparative Examples 10 – 11 were produced.
Coating of plastic substrates has heretofore been carried out by spray coating methods such as air spraying, airless spraying and the like. The coating film obtained in step 1 was left to stand at room temperature for 10 seconds for setting.
Examples of the meth acrylic acid alkyl ester monomer are monoesters of monoalcohols having 1 to 20 carbon atoms and meth acrylic acid such as methyl meth acrylate, ethyl meth acrylate, propyl meth acrylate, butyl meth acrylate, hexyl meth acrylate, 2-ethylhexyl meth acrylate, lauryl meth acrylate, stearyl meth acrylate, etc.
The same steps as in Comparative Example 1 were followed except for the changes shown in Table 4 below, giving multilayer coating films.