Abstract
A miniature combustor for converting organic samples into CO2 with application in carbon isotopic measurements has been manufactured and evaluated. The combustor was made of High-Temperature Co-fired Ceramic (HTCC) alumina green tapes. The device has a built-in screen printed heater and a temperature sensor made of platinum, co-sintered with the ceramic. A copper oxide oxygen supply was added to the combustor after sintering by in-situ electroplating of copper on the heater pattern followed by thermal oxidation. Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and Thermal Gravimetric Analysis (TGA) were used to study electroplating, oxidation and the oxide reduction processes. The temperature sensor was calibrated by use of a thermocouple. It demonstrates a temperature coefficient resistance of 4.66×10−3/°C between 32 and 660 °C. The heat characterization was done up to 1000 °C by using IR thermography, and the results were compared with the data from the temperature sensor. Combustion of starch confirmed the feasibility of using copper oxide as the source of oxygen of combustion.
Highlights
Isotope ratio measurements of carbon have multiple applications in a wide range of disciplines, e.g., earth sciences, forensic science, biomedicine, and archeology
This paper presents the fabrication and evaluation of a miniature combustor based on HighTemperature Co-fired Ceramic (HTCC) technology
Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) results The SEM images of the Cu electroplated cross section samples before oxidation as well as after reduction are shown in figure 3
Summary
Isotope ratio measurements of carbon have multiple applications in a wide range of disciplines, e.g., earth sciences, forensic science, biomedicine, and archeology. One way to reduce the analyte amount necessary is to miniaturize the sample analysis and preparation system, and perhaps even integrate the two. Cu and Ni wires were inserted in the reactor after manufacturing, and were thermally oxidized in situ to be used as the source of oxygen during the combustion. Merritt et al [4] made a tubular microvolume reactor (200×5 mm2) with nonporous alumina packed with metal wires oxidized after manufacturing (CuO/NiO) to be used for on-line combustion of gases. This paper presents the fabrication and evaluation of a miniature combustor based on HighTemperature Co-fired Ceramic (HTCC) technology. The heater is Cu electroplated in situ and thermally oxidized in order to provide for an integrated oxygen storage
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