The invention discloses a preparation method for purple archaistic ceramic pigment. The preparation method comprises the following steps: with Na2SiO3.9H2O (sodium metasilicate nonahydrate) as a silicon source and Cu(NO3)2 (cupric nitrate) and Ba(NO3)2 (barium nitrate) as a copper source and a barium source respectively, carrying out batching according to the chemical structural formula of Chinese purple and preparing a barium copper silicate performed polymer under magnetic stirring at a constant temperature; after dehydration and drying, carrying out a hydrothermal autoclave reaction at 160 to 180 DEG C so as to prepare a barium copper silicate pre-crystal; and carrying out crystallization sintering at a low temperature of 650 to 750 DEG C so as to obtain the Chinese purple archaistic ceramic pigment with a brilliant color and high purity and in good crystallization state.

Preparation method for purple archaistic ceramic pigment

The invention discloses a preparation method for archaistic blue pigments. The preparation method comprises the following steps: with quick-dissolving soluble glass as a silicon source and Ca(NO3)2 (calcium nitrate), Cu(NO3)2 (cupric nitrate) and Ba(NO3)2 (barium nitrate) as a calcium source, a copper source and a barium source respectively, preparing a barium-calcium-copper silicate precursor under magnetic stirring at a constant temperature; then carrying out a hydrothermal reaction at 160 to 180 DEG C for 16 to 20 h so as to prepare calcium copper silicate and barium copper silicate pre-crystals; and carrying out crystallization sintering at a low temperature of 550 to 700 DEG C for 4 to 6 h so as to obtain two archaistic blue pigments with high purity and in good crystallization state, i.e., Chinese blue and Egyptian blue.

Preparation method for archaistic blue pigments

The invention discloses a method for preparing an archaistic ceramic pigment Chinese dark blue. The method comprises the steps: with instant water glass as a silicon source, with copper nitrate Cu(NO3)2 and barium nitrate Ba(NO3)2 respectively as a copper source and a barium source, firstly, under constant-temperature ultrasonic stirring, successively adding copper nitrate and barium nitrate into an instant water glass solution, and adjusting the pH value to 10-11, to obtain a barium copper silicate copolymer; then carrying out a hydrothermal reaction at the temperature of 160 to 180 DEG C, to obtain barium copper silicate crystals; and finally, carrying out crystallization sintering at relatively low temperature of 500 to 650 DEG C, and thus obtaining the Chinese dark blue archaistic ceramic pigment having the advantages of bright color, high purity and good crystallized status.

Method for preparing archaistic ceramic pigment Chinese dark blue

The invention relates to an organosilicon packaging adhesive and a preparation method thereof. The organosilicon packaging adhesive adopts vinyl-terminated polydimethylsiloxane and polymethylhydrosiloxane as the main reaction parts of the material, wherein the molar ratio of vinyl to silicon hydrogen group is 1:(1-1.5). The filler part is obtained by coupling reaction of hydroxylation modified nano-boron nitride and vinyl trimethoxysilane, and the mass fraction is 0.01wt%-0.15wt%. Finally, a chloroplatinic acid catalyst is utilized for hydrosilylation curing of the above components, thus obtaining a high thermal conductivity and transparent LED organosilicon packaging adhesive. The prepared organosilicon packaging adhesive has light transmittance of 90% or above at 500nm, a refractive index of 1.4103 at 25DEG C and a thermal conductivity coefficient of 0.243 W/(m K).

Organosilicon packaging adhesive and preparation method thereof

The invention discloses a microporous film applicable to medium-high-temperature solar selectivity. The film comprises a CoO-CoAl2O4 absorption layer, wherein the CoO-CoAl2O4 absorption layer is prepared from CoO-CoAl2O4 sol; the CoO-CoAl2O4 sol is prepared from aluminium isopropoxide and cobalt nitrate as precursors. CoO-CoAl2O4 has micropores, and the CoO-CoAl2O4 micropores are of a microporousstructure which is formed by controlling escape rate of moisture in a solidifying stage in the preparation process. The invention further discloses a preparation method of the microporous film applicable to medium-high-temperature solar selectivity. The absorption film applicable to medium-high-temperature solar selectivity has the advantages that thermal stress concentration in a thermal treatment process of the film is relieved, crack propagation on film surface is terminated, and solar optical selectivity of the film is improved effectively by the slightly uneven surface due to the micropores.

Microporous film applicable to medium-high-temperature solar selectivity and preparation method of microporous film

The invention relates to a preparation method of an anti-counterfeiting cobalt blue pigment with an infrared reflectance function and a fluorescence emission function. A molecular formula of a blue material is CoAl2O4; and the structural composition is CoO.Al2O3. According to the method, a soluble raw material firstly reacts in a solution, is mixed evenly at a molecular level, and is burnt to obtain a product; meanwhile, a redox assistant is added to reduce the burning temperature and reduce energy consumption; and finally, the cobalt blue pigment with non-infrared absorption characteristic and fluorescence emission is finally synthesized. Compared with the prior art, the anti-counterfeiting cobalt blue pigment has the advantages that the anti-counterfeiting cobalt blue pigment is simple in preparation technology and low in burning temperature; and the pigment has no absorption in a near infrared region, has fluorescence emission in an ultraviolet region, and also has application value as an anti-counterfeiting pigment.

Preparation method of anti-counterfeiting cobalt blue pigment with infrared reflectance function and fluorescence emission function

The invention relates to macrocyclic oligomeric silsesquioxane, a modified organosilicon packaging adhesive thereof and a preparation method thereof. According to the invention, the macrocyclic oligomeric silsesquioxane (MOSS) (component A) and hydroxyl-terminated vinyl polysiloxane (component B) are synthesized, then the components A and B are mixed according to a mass ratio of 1:(1-5), and then a chloroplatinic acid catalyst is used for carrying out hydrosilylation curing for preparing the MOSS modified organosilicon packaging adhesive for LED packaging. The preparation method has a simple process and high synthetic yield; and the packaging adhesive has good heat stability, higher refractive index and good light transmittance and can be cured at lower temperature. The light transmittance of the prepared MOSS modified organosilicon packaging adhesive at a wavelength of 500nm is over 90%, the refractive index at a temperature below 25 DEG C is 1.535, the thermal decomposition temperature of the packaging adhesive is 416 DEG C proven by thermogravimetric analysis, the residual rate at 700 DEG C is 57%, a better heat-resistant property is exhibited, the tensile strength and breaking elongation of the packaging adhesive are respectively 1.88MPa and 157%, and the Shore A hardness is 36.

Macrocyclic oligomeric silsesquioxane, modified organosilicon packaging adhesive thereof and preparation method thereof

The invention relates to a fluorene-containing main chain nonconjugated-polymer blue light material and a preparation method thereof. The structural formula of the blue light material is a host/guest integrated structure in which the polystyrene host clamps the fluorenyl guest, which is disclosed in the specification. The obtained polymer has the advantages of favorable processability, and can form a film by solution spin coating. The polymer has excellent heat stability. The polymer has the functions of both the host and guest, and is applicable to single-layer luminescent layer devices. The material has the visible violent blue-fluorescence phenomenon under the excitation of 365nm ultraviolet light. Under the excitation of 325nm wavelength, the maximum absorption peak position of the solid film in the visible light region is 410-430nm, which is the deep blue region. The material has higher quantum efficiency, and the photoluminescent external quantum efficiency of the solid powder is 8.79% when being determined by an integrating sphere mode. After the polymer material is characterized by gel permeation chromatography (GPC), the number-average molecular weight is 80000 or so, and the molecular weight distribution is 1.1 or so. The polymer has favorable solubility, and is convenient for film formation.

Fluorene-containing main chain nonconjugated-polymer blue light material and preparation method thereof

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Papers

Preparation method of anti-counterfeiting cobalt blue pigment with infrared reflectance function and fluorescence emission function

Macrocyclic oligomeric silsesquioxane, modified organosilicon packaging adhesive thereof and preparation method thereof

Fluorene-containing main chain nonconjugated-polymer blue light material and preparation method thereof