Effect of pressure on thermal behavior of KDP crystals is investigated by using the in-situ infrared reflective spectra.Compared with that under normal atmosphere,the onset temperature of decomposition under pressure ...Effect of pressure on thermal behavior of KDP crystals is investigated by using the in-situ infrared reflective spectra.Compared with that under normal atmosphere,the onset temperature of decomposition under pressure of 1 MPa is improved to from 210℃to 213℃,suggesting that the thermal stability of KDP is enhanced.Under pressure of 2 MPa,the thermal stability is deteriorated and KDP begins to decompose at 183℃.Under normal atmosphere KDP decomposes in route of translating to K_(4)P_(2)O_(7)firstly,and then to KPO_(3).Under pressures of 1 MPa and 2MPa,KDP translates to KPO_(3)directly without any other polymeric intermediates.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 50721002 and 50990061.
文摘Effect of pressure on thermal behavior of KDP crystals is investigated by using the in-situ infrared reflective spectra.Compared with that under normal atmosphere,the onset temperature of decomposition under pressure of 1 MPa is improved to from 210℃to 213℃,suggesting that the thermal stability of KDP is enhanced.Under pressure of 2 MPa,the thermal stability is deteriorated and KDP begins to decompose at 183℃.Under normal atmosphere KDP decomposes in route of translating to K_(4)P_(2)O_(7)firstly,and then to KPO_(3).Under pressures of 1 MPa and 2MPa,KDP translates to KPO_(3)directly without any other polymeric intermediates.
