ɔːltˈɜːnətˌɪvli, ɐ sˈɑːlɪdfˈeɪz sˈɪnθəsˌɪs ʌv stɹˈɔntiəm bˈoːɹaɪd kæn biː kˈæɹid ˈaʊt baɪ ɹɪˈæktɪŋ tˈuː mˈoʊlz ʌv stɹˈɔntiəm kˈɑːɹbənˌeɪt wɪð θɹˈiː mˈoʊlz ʌv bˈoːɹɑːn kˈɑːɹbaɪd ænd wˈʌn mˈoʊl ʌv kˈɑːɹbən ɪnsˈaɪd ɐ vˈækjuːm fˈɜːnɪs.
Alternatively, a solid-phase synthesis of strontium boride can be carried out by reacting two moles of strontium carbonate with three moles of boron carbide and one mole of carbon inside a vacuum furnace.