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CN-122010163-A - Cesium silver iodine chlorine compound, cesium silver iodine chlorine optical crystal, and preparation method and application thereof

CN122010163ACN 122010163 ACN122010163 ACN 122010163ACN-122010163-A

Abstract

The invention provides a cesium silver iodine chlorine compound, a cesium silver iodine chlorine optical crystal, a preparation method and application thereof. The molecular formula of the cesium silver iodine chlorine compound is Cs 4 Ag 9 I 12 Cl, the molecular formula of the cesium silver iodine chlorine optical crystal is Cs 4 Ag 9 I 12 Cl, the cesium silver iodine chlorine optical crystal belongs to a cubic crystal system, the space group is I-43m, the unit cell parameter is a=b=c= 12.5045 (16) a, alpha=beta=gamma=90°, Z=2, and V= 1955.2 (8) a 3 . The cesium silver iodine chloride compound or the cesium silver iodine chloride optical crystal can be applied to the field of photoluminescent materials or the field of nuclear radiation detection.

Inventors

  • LIN WENWEN
  • CHENG BINGLIANG
  • MA WENJUAN
  • CHAI ZHIFANG

Assignees

  • 宁波杭州湾新材料研究院
  • 中国科学院宁波材料技术与工程研究所

Dates

Publication Date
20260512
Application Date
20260121

Claims (10)

  1. 1. The cesium silver iodized chlorine compound is characterized by having a molecular formula of Cs 4 Ag 9 I 12 Cl.
  2. 2. A method for preparing cesium-silver-iodine-chlorine compound according to claim 1, characterized in that the Cs-containing compound and the Ag-containing compound are mixed according to the mol ratio of Cs to Ag to I to Cl=4 to 9 to 12 to 1, the obtained mixture is heated to 190-220 ℃, the temperature is kept for 5-10h, and then the temperature is reduced to room temperature, so as to obtain the cesium-silver-iodine-chlorine compound, wherein the Cs-containing compound is CsCl and/or CsI, and the Ag-containing compound is AgCl and/or AgI.
  3. 3. The method for producing cesium silver iodate chloride compound according to claim 2, wherein the rate of temperature rise is 10 to 20 ℃ per hour and the rate of temperature decrease is 0.5 to 2 ℃ per hour.
  4. 4. The cesium silver iodine chlorine optical crystal is characterized in that the molecular formula is Cs 4 Ag 9 I 12 Cl, belongs to a cubic crystal system, the space group is I-43m, the unit cell parameter is a=b=c= 12.5045 (16) a, alpha=beta=gamma=90°, Z=2, and V= 1955.2 (8) a 3 .
  5. 5. The method for preparing cesium silver iodine chloride optical crystal of claim 4, comprising the steps of: s1, mixing a Cs-containing compound and an Ag-containing compound according to a molar ratio of Cs to Ag to I to Cl=4 to 9 to 12 to 1, heating the obtained mixture to 190-220 ℃, preserving heat for 5-10 hours, and then cooling to room temperature to obtain a cesium silver iodine chlorine compound, wherein the Cs-containing compound is CsCl and/or CsI, and the Ag-containing compound is AgCl and/or AgI; S2, using cesium silver iodine chlorine compounds as raw materials, and adopting a spontaneous crystallization method or a melt method to grow crystals to obtain cesium silver iodine chlorine optical crystals.
  6. 6. The method for preparing cesium silver iodine chlorine optical crystal according to claim 5, wherein in S1, the temperature rising rate is 10-20 ℃ per hour, and the temperature lowering rate is 0.5-2 ℃ per hour.
  7. 7. The method for preparing cesium-silver-iodine-chlorine optical crystal according to claim 5, wherein in S2, the crystal is grown by spontaneous crystallization, specifically comprising heating cesium-silver-iodine-chlorine compound to 300-400 ℃ at a rate of 10-20 ℃ per hour under air atmosphere, preserving heat for 5-10 hours, and cooling to room temperature at a rate of 0.5-2 ℃ per hour.
  8. 8. The method for preparing cesium-silver-iodine-chlorine optical crystal according to claim 5, wherein in S2, the crystal is grown by a melt method, in particular, the crystal is grown by a crucible descent method, wherein the temperature of a high temperature area of a crystal growing furnace is 300-400 ℃, the temperature rising rate of the high temperature area is 10-20 ℃ per hour, and the cesium-silver-iodine-chlorine compound stays in the high temperature area for 5-10 hours and then descends at a speed of 0.5-2mm per day.
  9. 9. Use of the cesium silver iodine chloride compound of claim 1 or the cesium silver iodine chloride optical crystal of claim 4 in the field of photoluminescent materials.
  10. 10. Use of the cesium silver iodine chloride compound of claim 1 or the cesium silver iodine chloride optical crystal of claim 4 in the field of nuclear radiation detection.

Description

Cesium silver iodine chlorine compound, cesium silver iodine chlorine optical crystal, and preparation method and application thereof Technical Field The invention relates to the technical field of nuclear radiation detection materials, in particular to a cesium silver iodine chloride compound, a cesium silver iodine chloride optical crystal, a preparation method and application thereof. Background The nuclear radiation detection material can convert high-energy rays or particles into visible light, and is widely applied to the fields of medical treatment, security inspection, high-energy physics and the like. The semiconductor nuclear radiation detection material applied in industrialization at present mainly comprises CdZnTe material, tlBr material and the like. The CdZnTe material and the TlBr material have excellent photoelectric properties, and have higher detection efficiency on X-rays and gamma-rays at room temperature. However, the CdZnTe material has the defects that Te component segregation phenomenon occurs in the single crystal growth process, so that the components are not uniform, and the growth cost is high. The TlBr material has the problems of low material hardness and difficult processing, and the TlBr material has serious ion polarization under the action of a long-term electric field, so that the nuclear radiation detection device cannot work stably for a long time. Therefore, the preparation of the novel semiconductor nuclear radiation detection material with low cost, high performance and high yield, which has better industrialization prospect, has important significance and practical value. Disclosure of Invention In order to solve the problems of the prior art, the invention provides a cesium silver iodine chloride compound, a cesium silver iodine chloride optical crystal, a preparation method and application thereof. The invention is realized by the following technical scheme: In a first aspect, the present invention provides a cesium silver iodate compound having the formula Cs 4Ag9I12 Cl. In a second aspect, the invention provides a preparation method of the cesium-silver-iodine-chlorine compound, which comprises the steps of mixing a compound containing Cs and a compound containing Ag according to a molar ratio of Cs to Ag to I to Cl=4 to 9 to 12 to 1, heating the obtained mixture to 190-220 ℃, preserving heat for 5-10 hours, and then cooling to room temperature to obtain the cesium-silver-iodine-chlorine compound, wherein the compound containing Cs is CsCl and/or CsI, and the compound containing Ag is AgCl and/or AgI. Preferably, the temperature rising rate is 10-20 ℃ per hour, and the temperature reducing rate is 0.5-2 ℃ per hour. In a third aspect, the present invention provides a cesium silver iodine chlorine optical crystal, wherein the molecular formula of the cesium silver iodine chlorine optical crystal is Cs 4Ag9I12 Cl, the cubic crystal system belongs to a space group of I-43m, the unit cell parameter is a=b=c= 12.5045 (16) a, α=β=γ=90°, z=2, and v= 1955.2 (8) a 3. In a fourth aspect, the invention provides a preparation method of the cesium silver iodine chlorine optical crystal, which comprises the following steps: s1, mixing a Cs-containing compound and an Ag-containing compound according to a molar ratio of Cs to Ag to I to Cl=4 to 9 to 12 to 1, heating the obtained mixture to 190-220 ℃, preserving heat for 5-10 hours, and then cooling to room temperature to obtain a cesium silver iodine chlorine compound, wherein the Cs-containing compound is CsCl and/or CsI, and the Ag-containing compound is AgCl and/or AgI; S2, using cesium silver iodine chlorine compounds as raw materials, and adopting a spontaneous crystallization method or a melt method to grow crystals to obtain cesium silver iodine chlorine optical crystals. Preferably, in the preparation method of the cesium silver iodine chlorine optical crystal, in S1, the heating rate is 10-20 ℃ per hour, and the cooling rate is 0.5-2 ℃ per hour. Preferably, in the preparation method of the cesium silver iodine chlorine optical crystal, S2, a spontaneous crystallization method is adopted to grow the crystal, and specifically, the preparation method comprises the steps of heating the cesium silver iodine chlorine compound to 300-400 ℃ at the rate of 10-20 ℃ per hour in an air atmosphere, preserving heat for 5-10 hours, and then cooling to room temperature at the rate of 0.5-2 ℃ per hour. Preferably, in the preparation method of the cesium silver iodine chlorine optical crystal, in S2, a melt method is adopted to grow the crystal, specifically, a crucible descent method is adopted to grow the crystal, wherein the temperature of a high temperature area of a crystal growing furnace is 300-400 ℃, the temperature rising rate of the high temperature area is 10-20 ℃ per hour, and the cesium silver iodine chlorine compound stays in the high temperature area for 5-10 hours and then descends at a speed of 0.5-2mm per day. In a fift