| abstract |
A conversion element ( 3 ) comprising a ceramic material ( 31 ) with a multiplicity of pores ( 32 ) provided for at least the partial absorption of at least one primary radiation ( 52 ) and for transforming the primary radiation ( 52 ) into at least one secondary radiation ( 53 ), wherein the conversion element ( 3 ) has a density greater than or equal to 97% of the theoretical solid-state density of the ceramic material ( 31 ), and the pores ( 32 ) in the conversion element ( 3 ) have a diameter substantially between 200 nm and 5000 nm. |