▎ 摘　　要

NOVELTY - Preparing high-sensitivity temperature sensor based on graphene-barium strontium titanate heterojunction involves preparing, polishing barium strontium titanate ceramic with specific stoichiometric ratio of BaxSr1-xTiO3 by solid-phase sintering, cutting the graphene loaded on the copper sheet, spin-coating a layer of polymethyl methacrylate on the graphene to obtain the spin-coated graphene, putting the spin-coated graphene into the copper etching solution, taking the graphene from the copper etching solution, washing the graphene in deionized water to obtain clean graphene, using the wet transfer method to transfer the cleaned graphene to the polished surface of the barium strontium titanate ceramic, and putting the barium strontium titanate ceramic into an oven for drying to obtain the dried barium strontium titanate ceramic. USE - Method for preparing high-sensitivity temperature sensor based on graphene-barium strontium titanate heterojunction. ADVANTAGE - The method enables to prepare graphene-barium strontium titanate heterojunction high-sensitivity temperature sensor with high current change rate and high detection sensitivity. DETAILED DESCRIPTION - Preparing high-sensitivity temperature sensor based on graphene-barium strontium titanate heterojunction involves preparing, polishing barium strontium titanate ceramic with specific stoichiometric ratio of BaxSr1-xTiO3 by solid-phase sintering, cutting the graphene loaded on the copper sheet, spin-coating a layer of polymethyl methacrylate on the graphene to obtain the spin-coated graphene, putting the spin-coated graphene into the copper etching solution, taking the graphene from the copper etching solution, washing the graphene in deionized water to obtain clean graphene, using the wet transfer method to transfer the cleaned graphene to the polished surface of the barium strontium titanate ceramic, putting the barium strontium titanate ceramic into an oven for drying to obtain the dried barium strontium titanate ceramic, putting the dried barium strontium titanate ceramic into acetone to dissolve the polymethyl methacrylate on the surface of the graphene, putting into deionized water for cleaning to obtain a graphene-barium strontium titanate heterojunction, and putting the obtained graphene-barium strontium titanate heterojunction into an oven for drying to obtain a high-sensitivity temperature sensor based on the graphene/barium strontium titanate heterojunction.