Burnout of the organic vehicle in an electrically conductive thick-film paste

Abstract

The burnout of the organic vehicle in a silver-particle, glass-free, electrically conductive, thick-film paste during firing in air was studied. For a vehicle consisting of ethyl cellulose dissolved in ether, burnout primarily involves the thermal decomposition of ethyl cellulose. The presence of ether with dissolved ethyl cellulose facilitates the burnout of ethyl cellulose. Excessive ethyl cellulose hinders the burnout. A high heating rate results in more residue after burnout. By interrupting the heating at 160°C for 15 min, the residue after subsequent burnout is diminished probably because of reduced temporal overlap of the processes of organic burnout and silver particle necking. By interrupting the heating at either 300°C or 385°C for 30 min, the temperature required for complete burnout is reduced. The addition of silver particles facilitates drying at room temperature and burnout upon heating.

Influence of sintering temperature on screen printed Cu2ZnSnS4 (CZTS) films

“…These values of resistivity are similar to the resistivity of 2 Â 10 2 X cm for CZTS prepared by Nakayama and Ito [6], and larger than 0.02-0.47 X cm for CZTS obtained by both Pamplin and Feigelson [27] and Seol et al [28]. Liu and Chung [29] reported that the burnout of ethyl cellulose by itself 80% complete upon heating to 320°C and 98% complete upon heating to 475°C at a heating rate of 15°C/min. This indicated that the CZTS film sample after sintering at 400°C still contained residue ethyl cellulose, which led to its poor conductivity.…”

Effects of Palladium Loading on the Response of Thick Film Flame-made ZnO Gas Sensor for Detection of Ethanol Vapor

“…We believe that the tape plays an important role in creating a thick film layer by providing a template for film formation. The resulting substrates were heated in an oven at 400°C for 2h with a heating rate of 2°C/min for binder removal [ 82 - 87 ] and cooled down to 20°C with the heating rate of 5°C/min prior to the sensing test. Finally, the Au bonding was fabricated using pure Au wires (Alfa Aesar, 0.2 mm (0.008in) dia, 99.9% (metal basis)) that were put through the tiny holes of gold electrodes by soldering.…”

Spray Drying as a Fast and Simple Technique for the Preparation of Extended Release Dipyridamole (DYP) Microparticles in a Fixed Dose Combination (FDC) Product with Aspirin

“…Ethyl cellulose is thermoplastic, with a softening point of 140 °-170 °C and a melting point of 160 °-210 °C; it decomposes at temperatures above 200 °C [ 20 ] . The large exothermic peak exhibited in the thermograms of ethylcellulose and the physical mixture is attributed to ethyl cellulose decomposition [ 21 ] . The absence of an endothermic peak related to DYP melting in both the spray dried formulation and the physical mixture ( • ▶ Fig.…”