Microwave Absorbing Sheets: Principles and Common Frequency Ranges
Absorbing sheets work by absorption, reflection or interference. Sheet types A to G show how thickness and weight relate …
Liquid Silicone Rubber Types: One-Part, Two-Part, Condensation and Addition Cure
Liquid silicone rubber is grouped by packaging (one-part or two-part) and by cure chemistry (condensation or addition), …
Basic Properties of Silicon: Physical Data and Electron Configuration
Silicon is a metalloid with atomic number 14, melting at 1414°C and boiling at 3265°C, with a diamond cubic structure. …
Calculating the Molar Mass of Polydimethylsiloxane
Using the repeating unit C2H6OSi of polydimethylsiloxane, the molar mass is 24 + 6.048 + 16 + 28.09 = 74.138 g/mol. Also …
Dielectric Constant Defined: Relative Permittivity and Polarity
Relative permittivity εr is a material's permittivity εs divided by the vacuum value ε0, so vacuum has εr = 1. Covers …
Electron Shells and Orbitals: Capacity, Energy and Filling Order
Electrons sit in shells and orbitals: the K, L and M shells hold up to 2, 8 and 18 electrons, and each orbital holds …
Heat Calculations: Heating, Thermal Equilibrium and Phase Changes
Q = mcΔT gives heat for temperature change and Q = mL for phase change. Four worked examples give an equilibrium …
HTV and RTV Silicone Rubber: Classification by Cure Method
Silicone rubber is classed by cure method: HTV, a high molecular weight gum molded at about 160°C, and RTV, a liquid …
Mole Fraction: Definition and Calculation
Mole fraction is the moles of one component divided by total moles in a mixture; all fractions sum to 1. Gives the …
Periodic Trends in Atomic Properties: Ionization Energy and Electronegativity
Ionization energy rises in a sawtooth pattern across a period and peaks at the noble gases. Covers the periodicity of …
Peroxide Crosslinking Efficiency E and How It Differs in Silicone Rubber
Crosslinking efficiency E of an organic peroxide is the rubber's network density divided by the radical concentration. …
Rubber Vulcanization and Crosslinking: Three Ways to Cure
Vulcanization turns linear rubber molecules into a three-dimensional network, changing mechanical properties and …