The proposed experiment involves identification of the phase boundaries and determination of the crystal structures of PbZrO3-BiFeO3 (PZ-BF) ceramics as a function of temperature and pressure. Such materials have potential for use in explosive shock sensors, since the change of pressure induces a transformation from the ferroelectric rhombohedral phase to the antiferroelectric orthorhombic or tetragonal phase. Four different types of PZ-BF ceramics will be prepared in Manchester and subsequently investigated on the Pearl beam line. Neutron diffraction patterns for each composition will be recorded at room temperature over a range of pressures, from atmospheric to 2 GPa. In addition, one composition will be chosen for further experiments involving the variation of pressure at a series of different temperatures between 50 and 200 °C.