Cosmetics have been used for thousands of years. In ancient times, people used cinnabar as cosmetics, but it is very easy to cause mercury poisoning after being decomposed by heat, and heavy metal elements such as arsenic, antimony and lead contained in cinnabar can also cause harm to… Read More »Application of bismuth oxychloride in cosmetics
Yttrium aluminate, also known as yttrium aluminum oxide, YAG for short, also known as yttrium aluminum garnet. The chemical formula is Al5H5O12Y3, the molecular weight is 598.65800, and the CAS number is 12005-21-9. Except for the compound of yttrium, all other chemicals are reagent-grade. Yttrium acetate and yttrium… Read More »How is yttrium aluminate produced?
First, the shortcomings of barium zirconate ceramicsBarium zirconate ceramics is a kind of ceramic material with high strength, high toughness and high environmental stability, which is widely used, but it still has some shortcomings in some aspects: Second, the improvement methodIn order to overcome the shortcomings of barium… Read More »Shortcomings and improvement methods of barium zirconate ceramics
Calcium copper titanate-cacu3ti4o12 compound (CCTO for short) is a perovskite cubic structure. It has been widely used in a series of high-tech fields, such as high-density energy storage, thin film devices (such as MEMS, GB-DRAM) and high-dielectric capacitors. Such as: (1)CaCu3Ti4O12 has good comprehensive performance, which makes it… Read More »Better application of copper calcium titanate
The chemical formula of cesium tungsten bronze powder is generally CsxWO3, where the value of X is usually less than 0.33. This compound is composed of cesium, tungsten and oxygen, with non-stoichiometric ratio and special oxygen octahedral structure. This structure endows cesium tungsten bronze powder with a series… Read More »A New Conductive Insulating Material — cesium tungsten bronze Powder
The phenomenon that a substance or a system changes color obviously under the action of an external excitation source is called photochromism. Photochromism means that when compound A is irradiated by light with a certain wavelength, a photochemical reaction takes place to obtain product B with different chemical… Read More »About Photochromic polymer
The tolerance of temperature-sensitive color-changing pigments to different solvents is different. Soaking in some solvents for 6 months will not affect their color-changing performance, but other solvents can erode the surface layer of microcapsules and penetrate into them within several hours to weeks, so that the color-changing performance… Read More »Effect of Solvent on Pigment Discoloration Performance
As a new information storage material, photochromic compounds have the characteristics of high resolution and large storage capacity, which can be widely used in frontier fields such as optical information storage, optical conversion devices and optical switches, and have aroused widespread interest. The countries that study photochromic materials… Read More »Application of photochromic polymers
Many studies have proved that the photochromic mechanism of Schiff base proposed by Cohen, namely the excited state proton transfer reaction mechanism, is reasonable. However, the structure of photochromic and thermochromic products has been a topic of debate. Cohen et al. believed that thermochromic products have a (cis-Keto)… Read More »Structure of photochromic and thermochromic products
Under the action of light, polymers that can reversibly change color are called photochromic polymers, which belong to polymer materials. According to Krongauz’s definition of a photochromic polymer, a photochromic polymer means that the photochromic pigment molecules are chemically bonded to large molecules. In the strict sense, photochromic… Read More »Definition of photochromic polymers