| abstract |
A heat-insulating layer ( 21 ) provided on a surface of a component ( 19 ) facing an engine combustion chamber contains hollow particles ( 23 ) made of an inorganic oxide, a filler material ( 25 ), and a vitreous material ( 27 ) containing silicic acid as a main constituent. The vitreous material ( 27 ) is not in powder form, and surrounds and bonds the hollow particles ( 23 ) and the filler material ( 25 ) together. |