论文部分内容阅读
以硫化锌为基质的发光材料是目前最广泛使用的一种发光材料,在阴极射线发光、光致发光、电致发光和X射线发光等领域中,都占有非常重要的位置。作为发光材料基质的硫化锌,在工业上都采用硫化氢法进行大量生产。但这种方法存在以下缺点:工艺复杂,有大量毒气产生;所生成的硫化锌晶体结构不致密,易吸附杂质。气液相间的反应受各种因素影响,气体流量、流速和压力、溶液浓度和pH值以及反应温度的控制都会影响硫化锌的特性,从而对硫化锌发光材料的性能带来影响。采用以硫脲为沉淀剂的均匀沉淀法(下面简称硫脲法)制备硫化锌可克服上述特点,这种方法得到的硫化锌颗粒大,粒度分布均匀,结晶性好,可作成性能更优良的发光材料。另外,利用硫脲法在绿色发光材料粒子的表面上均匀地包复一层硫化锌膜,可以获得一种新的发光材料——电压敏感性多色发光材料。
Zinc sulfide-based luminescent materials are the most widely used luminescent materials at present and occupy a very important position in the fields of cathodoluminescence, photoluminescence, electroluminescence and X-ray emission. Zinc sulfide, which is a matrix of a luminescent material, is industrially produced by mass production using hydrogen sulfide method. However, this method has the following disadvantages: the process is complicated and a large amount of poisonous gas is generated; the crystal structure of the zinc sulfide generated is not dense and impurities are easily adsorbed. The reaction between gas and liquid is influenced by various factors. The control of gas flow rate, flow rate and pressure, solution concentration and pH, and reaction temperature all affect the properties of zinc sulfide and affect the performance of ZnS. The use of thiourea as precipitation agent uniform precipitation (hereinafter referred to as thiourea) preparation of zinc sulfide can overcome the above characteristics, this method to obtain zinc sulfide particles, particle size distribution, good crystallinity, can be made more excellent performance Luminescent material. In addition, by using the thiourea method to uniformly coat a zinc sulfide film on the surface of green luminescent material particles, a new luminescent material, a voltage-sensitive multicolor luminescent material, can be obtained.