摘要翻译:公开了一种具有等于或低于BAM:Eu的亮度和色度y的硅酸盐蓝色荧光体的制造方法。 具体公开了一种由以下通式表示的硅酸盐蓝色荧光体的制造方法:aAO bEuO(Mg 1-w,Zn x O)O c SiO 2, (其中A表示选自Sr,Ba和Ca中的至少一种,2.970 = a = 3.500,0.006 = b = 0.030,1.900 = c = 2.100,0 = d = 0.05 ,0 = w = 1)。 这种硅酸盐蓝色荧光体的制造方法的特征在于,在氧分压为1×10 -15〜15℃的气氛中进行热处理至1×10 -10 SUP> atm at 1200-1400°C。
摘要:
Provided is a plasma display device having a novel phosphor layer which emits green light and improved initial emission luminance and improved emission luminance maintaining rate. The phosphor layer includes particles of Zn 2 SiO 4 :Mn. The surface of the particles are covered with aluminum oxide. The ratio of Al to Si measured by an X-ray photoelectron spectroscopy (XPS) apparatus on the particle surface is 0.6 or more but not more than 4.0.
摘要:
A broad bandwidth light source including: a solid state light emitting device (102) that generates short wavelength light; and quantum dot material (104) and phosphor material (106) that are each irradiated by some of the short wavelength light. The short wavelength light has a spectrum with a first peak wavelength shorter than about 500nm. The quantum dot material (104) absorbs some of the short wavelength light and reemits it as long wavelength light having a spectrum with a second peak wavelength longer than about 600nm. The phosphor material (106) absorbs some of the short wavelength light and reemits it as mid wavelength light having a spectrum with a peak wavelength between the first and second peak wavelengths. The light source is configured such that some of each light (short, mid, and long wavelength) is emitted coincidently as a light having a chromaticity value near the blackbody locus and a color rendering index greater than 80.
摘要:
The present invention provides a process for producing fine metal oxide particles efficiently and simply. The process for producing fine metal oxide particles of the present invention comprises subjecting a gaseous organometallic compound to combustion in a gas phase in the presence of an oxidizing substance; mixing a gaseous organometallic compound with an oxidizing substance to prepare a mixture and subjecting the mixture to combustion; mixing an organometallic compound solution with an oxidizing substance to prepare a mixture making the mixture into a gaseous state and then subjecting the gaseous mixture to combustion; or mixing an oxidizing substance with a gaseous organometallic compound prepared by vaporizing an organometallic compound solution to prepare a mixture and subjecting the mixture to combustion.
摘要:
The present invention relates to a phosphor for a plasma display panel and a method for producing the same. The phosphor is formed by coating a metallic oxide having a high polarity to a surface of a green phosphor Zn 2 Si0 4 :Mn with a thickness of 10nm to 0.5 μm. The concentration of a metallic oxide is in a range of 1 to 50 weight % with respect to the green phosphor. According to the green phosphor for the plasma display panel of the present invention, which is made with coating a metallic oxide having a positive polarity to a surface of a phosphor can be adjusted, thereby enhancing the discharge characteristics when the panel is driven.
摘要:
This invention relates to a process for preparing a spherical green-emitting phosphor based on zinc orthosilicate and more particularly, to the process for a zinc orthosilicate-based green-emitting phosphor demonstrating an emission spectrum at visible regions, when excited by electron beam, via a new application of 'the homogeneous precipitation method' comprising the following steps such as i) a solution of tetraethylorthosilicate (TEOS) diluted in ethanol is hydrolyzed to obtain a hydrated silica, ii) said hydrated silica is dispersed together with the solution containing zinc and manganese components, iii) a precipitant selected from oxalic acid and oxalates is added to said dispersed solution together with a basic solution, while precipitating zinc and manganese components, iv) said admixture precipitate, so filtered off and dried, is calcined in the air and reheated under the reducing atmosphere to generate a phosphor powder; hence, the above-described phosphor particle is quite effective in a variety of display fields of industry including PDP, since it has a spherical shape with less agglomeration and homogeneous distribution of manganese, an activator, thus proving superior to the conventional phosphor prepared by the solid state reaction method in terms of brightness.