Production of Ceramic Green Bodies Using a Microwave‐Reactive Organic Binder

Abstract

Because the pyrolysis of organic substances can result in the emission of harmful pollutant gases, a reduction in the use of organic binders is one aim of today's ceramics industry. A novel ceramic‐forming process was developed that requires considerably less organic binder than conventional techniques. The process involves immobilizing reactive molecules on the surfaces of the particles, which on subsequent irradiation with microwaves, form bridges that bind the entire particle assembly together. The chemical forces involved produce strong bonds, resulting in a significant reduction in the amount of organic binder that is required to maintain the shape of the ceramic green body. This method will help to decrease emissions of harmful gases produced from pyrolysis of the binder.

Thermal conductivity enhancement of alumina/polyamide composites via interfacial modification

“…In IR spectral measurements, a diagnostic absorption band from carbodiimide stretching should be found at 2120 cm À 1 [17]. IR diffuse reflectance spectra of as received, 3-APStreated and WDC-grafted alumina particles in the carbodiimide stretching region are shown in Fig.…”

“…WDC used has reactive carbodiimide segments (À NQCQNÀ ) and highly hydrophilic oxyethylene segments (À CH 2 CH 2 OÀ ) in its structure: the molar ratio of carbodiimide to oxyethylene is approximately 1:10. WDC forms covalent bonds with amino-functionalized surfaces [17]. The resultant powdery material was washed with copious amounts of water and subjected to freeze dehydration.…”

Dispersion of Ceramic Particles in Aqueous Media with Surface‐Grafted Dispersant

“…In IR spectral measurements, a diagnostic absorption band from carbodiimide stretching should be found at 2120 cm −1 17 . FTIR diffuse reflectance spectra of as‐received, amino group‐introduced, and WDC‐grafted silica in the carbodiimide stretching region are shown in Fig.…”

Carbon fiber/epoxy composite materials cured thermally and with microwave irradiation

“…Microwave irradiation was carried out in a tunable magnetron multimode microwave furnace (MW-Master, Mino Ceramics Co. Ltd, Japan). [12] The composite specimens were placed in a thermally-insulated box and irradiated with microwaves at 2.45 GHz. When the CFRP composites are irradiated with microwaves, CFs are heated in a time-efficient manner.…”