Thicker films need multiple coatings. After coating, the substrates were loaded carefully into an electrically heated furnace, where they were heated in circulating air to the desired temperature at a rate greater than 10 °C min-l.
Thicker films need multiplecoatings. After coating, the substrates were loaded carefullyinto an electrically heated furnace, where theywere heated in circulating air to the desired temperatureat a rate greater than 10 °C min-l.