摘要:
Gray-black pigments are prepared by encapsulating iron titanates of formula FeTiO.sub.3 in zirconium silicate crystals. Manufacture is by calcining a mixture of zirconium oxide having a particle size distribution of 6 to 10 .mu.m and a specific surface area of 2 to 5.2 m.sup.2 /g, silicon dioxide and iron and titanium oxides or Fe and Ti compounds forming oxides in the presence of mineralizers under oxidizing conditions at 800 to 1300.degree. C. Finely divided FeTiO.sub.3 can also be used.
摘要:
Inclusion pigments are discolored having zirconium silicate as a casing component and chromium (III) oxide (Cr.sub.2 O.sub.3) as a discrete, included color compound. The included Cr.sub.2 O.sub.3 has a D.sub.50 value in the range of 0.1 to 3.0 .mu.m and a brilliant light green color. Contrary to non-included Cr.sub.2 O.sub.3 of identical value, the pigments of the present invention may be used for the preparation of decorations without problems and difficulties in their application and maintaining sharp lines and contours. The pigments are suitable for direct pressing and high temperature firing processes. They are prepared by fusing a mixture of zirconium dioxide, silicon dioxide, mineralizators and chromium oxide.
摘要翻译:包含颜料变色,其具有硅酸锆作为外壳组分和作为分散的包括彩色化合物的氧化铬(III)(Cr 2 O 3)。 所含的Cr 2 O 3的D 50值为0.1〜3.0μm,亮绿色。 与不含相同值的Cr 2 O 3相反,本发明的颜料可用于制备装饰品而不会出现问题,并且难以应用并保持尖锐的线条和轮廓。 颜料适用于直接压制和高温烧制工艺。 它们通过熔融二氧化锆,二氧化硅,矿化剂和氧化铬的混合物来制备。
摘要:
Coated spinel color pigments with a core of a colored spinel, in particular CoAl.sub.2 O.sub.4, and a coating glassy layer of a silicate are described. The coating layer is essentially silicon dioxide and one or more oxides of the group of alkali metals, alkaline earth metals, and/or earth metals show a high resistance to bleeding in the presence of glass fluxes, as compared to uncoated spinels. The pigments are produced by sintering, for 0.5 to 5 hours, a powder mixture of the spinel, silicon dioxide, and at least one member chosen from the group of alkali metal halides, alkaline earth metal halides, earth metal halides and mixtures thereof as mineralizer at 900.degree. to 1,300.degree. C. The coated spinel color pigments are suitable for the production of ceramic decorations with improved contour sharpness.
摘要翻译:描述了具有着色尖晶石核心的涂覆的尖晶石颜料颜料,特别是CoAl 2 O 4,以及硅酸盐的涂层玻璃层。 与未涂覆的尖晶石相比,涂层基本上是二氧化硅,并且一组碱金属,碱土金属和/或土金属的一种或多种氧化物在玻璃熔体存在下显示出高的耐渗出性。 颜料通过将尖晶石,二氧化硅和选自碱金属卤化物,碱土金属卤化物,土金属卤化物及其混合物中的至少一种的粉末混合物烧结0.5至5小时来生产,作为矿化剂 在900至1300℃。涂覆的尖晶石颜料适用于生产具有改进的轮廓清晰度的陶瓷装饰。
摘要:
Inclusion pigments are disclosed based on zirconium silicate as a casing component and cobalt-free spinels as discrete, included colored compounds. The inclusion pigments are prepared by fusing a mixture of a zirconium dioxide source, a silicon dioxide source, one or more mineralizer and cobalt-free oxides in a ratio suitable for spinel-formation. The inclusion pigments have high enamel-fastness and high color-fastness. Further, the pigments are drain-resistant under usual decoration firing conditions.
摘要:
Gray-black inclusion pigments are made using zirconium silicate as the encasing substance and carbon black particles as the inclusion phase by annealing a mixture of zirconium dioxide, a source for silicon dioxide, carbon black and mineralizers under reducing conditions at 900.degree.-1400.degree. C. The process uses zeolites with an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of more than 4, preferably more than 10, as the SiO.sub.2 source. The depth of the color can be increased by also using an adhesion agent, especially silicon oil. The use of the zeolites facilities the employment of different zirconium dioxide qualities and permits the production of pigments with higher carbon black inclusion rates.
摘要翻译:灰黑色夹杂物颜料是通过在900-114℃的还原条件下退火二氧化锆,二氧化硅源,炭黑和矿化剂的混合物,使用硅酸锆作为包裹物质和炭黑颗粒作为夹杂相来制备的。 该方法使用SiO 2 / Al 2 O 3摩尔比大于4,优选大于10的SiO 2源的沸石。 也可以通过使用粘合剂,特别是硅油来增加颜色的深度。 使用沸石设备使用不同的二氧化锆质量,并允许生产具有较高碳黑夹杂率的颜料。
摘要:
The invention relates to new brown to gray inclusion pigments, based on zirconium silicate as casing substance, which are characterized in that they contain mixed crystals of the type (Fe.sub.1-x Mn.sub.x).sub.2 O.sub.3, in which x stands for a number in the range from 0.05 to 0.60, as colored compounds. The production takes place by means of annealing a mixture of SiO.sub.2 and ZrO.sub.2, or of precursors, in the presence of iron compounds and manganese compounds, in an Fe/Mn atomic ratio of 90:10 to 20:80, and mineralizers at 750.degree. to 1200.degree. C. The brown pigments are formed especially at temperatures of 850.degree. to 1000.degree. C. and if x is between 0.05 and 0.20. The gray pigments are formed especially at 1050.degree. to 1200.degree. C. and if x is 0.30 to 0.60.
摘要:
The preparation of gray-green unitary pigment bodies based on zirconium silicate-vanadium oxide wherein a mixture of zirconium oxide and silicon oxide in the presence of a vanadium and lithium compound is calcined above 600.degree. C. and wherein the amount of V.sub.2 O.sub.5 is more than 17 percent by weight and the amount of lithium compound added is such that the atom ratio Li/Li+V is from 0.1 to 0.5.
摘要翻译:制备基于硅酸锆 - 氧化钒的灰绿色整体色素体,其中在钒和锂化合物的存在下,氧化锆和氧化硅的混合物在600℃以上煅烧,其中V 2 O 5的量大于 17重量%,添加的锂化合物的量使得Li / Li + V的原子比为0.1〜0.5。
摘要:
The grayish-black encapsulated pigments contain carbon black particles with specific surface areas of 10 to 1000 m.sup.2 /g (BET) encapsulated in colorless crystals of zirconium silicate. In order to produce the pigments, mixtures of zirconium oxide with a particle size distribution (D50 values) between 7 and 10 .mu.m and a spec. surface between 2 and 4 m.sup.2 /g, silicon oxide, carbon black and mineralizers are heated under reducing conditions to 900.degree. to 1400.degree. C. and calcined for 0.5 to 8 hours and recalcined under oxidizing conditions to remove the non-included carbon black. The encapsulated pigments of the invention are suitable for the pigmented coloration of glazes.
摘要:
Beige-brown encapsulated pigments are obtained by means of the encapsulation of iron titanates of the formula Fe.sub.2 TiO.sub.5 in zirconium silicate crystals. The production takes place by calcining a mixture of zirconium oxide with a particle size distribution of .ltoreq.5 .mu.m and specific surfaces of .gtoreq.4 m.sup.2 /g, silicon dioxide and iron oxides and titanium oxides or oxide-forming Fe compounds and Ti compounds in the presence of mineralizers under oxidizing conditions at 800.degree. to 1300.degree. C.
摘要:
Brown spinel pigments based on zinc chromite which are iron-free and exhibit an atomic ratio of chromium to zinc in a range of 1 to greater than 0.5 up to 2 are disclosed. Preferred pigments additionally contain manganese, in which instance the atomic ratio of Mn to Cr is a maximum of 0.2. The production of the pigments involves a firing process of a powder mixture consisting of the oxides the metals, or precursors thereof, contained in the pigment. Instead of previously known grayish-brown unattractive products, attractive brown pigments are obtained by means of the selected molar ratio and a baking temperature above 1200.degree. C. The novel pigments can be used in the presence of glass frits even at firing temperatures above 1200.degree. C. to 1500.degree. C. and are suitable for a common firing of ceramic carrier and decoration.