Six Major Uses of Silver Nitrate Powder

  Rhodium(III) oxide ( Rh₂O₃ ， Rhodium oxide ，   CAS: 12 036-35-0)   is a gray, high-melting-point inorganic compound that is extremely insoluble in water. It possesses excellent thermal stability and chemical inertness, characteristics that determine its outstanding applicability under high temperatures and harsh environments. For example, rhodium hydroxide is insoluble in common solvents, with a melting point of about 1100 °C and a density of approximately 8.2 g/cm³. Due to its strong stability and basic oxide nature, rhodium oxide is often used as a component of high-temperature structural materials, optical ceramics, and high-performance electronic materials. In rhodium oxide thin films, reversible electrochromic properties (visible light changing between yellow ↔ green) as well as photoconductive behavior similar to ITO (indium tin oxide) transparent conductive oxides have been observed. These physicochemical properties lay the foundation for the application of rhodi...

  Introduction In the development and application of next-generation high-performance polyimide (PI) materials , DMCBDA (Dimethyl-cyclobutane-1,2,3,4-tetracarboxylic dianhydride)  has gained increasing attention as a critical dianhydride monomer. With its unique molecular structure, DMCBDA not only enhances the optical transparency of polyimides but also effectively reduces their dielectric constant, thereby meeting the high-performance requirements of flexible electronics, 5G/6G communications, and advanced optical devices . Key Parameters of DMCBDA Parameter Value / Characteristics Chemical Name Dimethyl-cyclobutane-1,2,3,4-tetracarboxylic dianhydride Molecular Formula C₁₀H₈O₆ Molecular Weight 224.17 g/mol Appearance White to off-white solid powder Melting Point ~220–230 °C Purity ≥99% (industrial/electronic grade) Features Methyl substitution enhances transparency, lowers dielectric constant, and reduces water absorption Functions of DMCBDA 1. Enhancing Optical Transparency...

  Introduction In the high-performance polyimide (PI) supply chain, CBDA (Cyclobutane-1,2,3,4-tetracarboxylic dianhydride)  and DMCBDA (Dimethyl-cyclobutane-1,2,3,4-tetracarboxylic dianhydride)  are two widely used dianhydride monomers. Both can endow polyimide materials with unique transparency and low dielectric properties, but they differ significantly in structure, performance, and application scenarios . For procurement managers, understanding these differences is essential for material selection and cost optimization . Structural and Performance Differences Between CBDA and DMCBDA Structural Differences CBDA : The basic cyclobutane tetracarboxylic dianhydride, molecular formula C₈H₄O₆, compact and symmetrical. DMCBDA : With two methyl substituents on the cyclobutane backbone, its molecular volume is larger with increased steric hindrance. This substitution difference directly affects the optical properties, thermal stability, and dielectric constant  of the res...

  What is Cyclobutane-1,2,3,4-tetracarboxylic dianhydride? Cyclobutane-1,2,3,4-tetracarboxylic dianhydride ( CBDA )  is an organic dianhydride compound with the molecular formula C₈H₄O₆ , consisting of a cyclobutane ring and four carboxyl groups. Due to its symmetric dianhydride structure and unique alicyclic backbone, CBDA  plays a significant role in the synthesis of polyimide materials . Key Parameters of Cyclobutane-1,2,3,4-tetracarboxylic dianhydride Chemical Name : Cyclobutane-1,2,3,4-tetracarboxylic dianhydride Abbreviation : CB D A Molecular Formula : C ₈ H ₄ O ₆ Molecular Weight : 196.1 1   g/mol CAS No. : 4415-87-6 Appearance : White to off-white crystalline powder Melting Point : 290 – 300 ° C (decomposes) Solubility : Insoluble in water; soluble in polar organic solvents (e.g., NMP, DMF) These parameters are essential for both research applications  and industrial production , providing a reliable reference for material selection. Functions of Cyclob...