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Potassium antimonate crystal with cubic structure and preparation method thereof

A technology of cubic structure, potassium antimonate, applied in the direction of crystal growth, chemical instruments and methods, self-solid, etc.

Active Publication Date: 2021-09-14
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far there is still no SbO-based 6 Octahedral KSbO with shared corners 3 Structural Polymorphic Reports

Method used

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  • Potassium antimonate crystal with cubic structure and preparation method thereof
  • Potassium antimonate crystal with cubic structure and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The chemically pure trigonal crystal structure of KSbO 3 The powder is pressed into a small round cake with a thickness of about 20 μm and a diameter of about 100 μm, and put into a metal cavity with a thickness of about 30 μm and a diameter of about 150 μm. The material of the metal cavity is T301 stainless steel or rhenium sheet. A diamond pair with an anvil surface diameter of 400 μm is pressed. By the method of condensing argon with liquid nitrogen, the argon is filled into the KSbO with a three-party structure through a condensing device. 3 Cavity for powder and ruby ​​granules (indentation), solid argon as pressure transmission medium and insulation. Through the built-up laser double-sided heating system, the sample in the diamond pressure chamber is subjected to high-pressure and high-temperature treatment in an environment with a pressure of 35GPa or more, a temperature of 1200°C, and a time of more than 20 minutes, and the product of the present invention is o...

Embodiment 2

[0028] Chemically pure K with a molar ratio of 1:1 2 CO 3 and Sb 2 o 5 The powder is fully mixed, ground, and pressed into a small round cake with a thickness of about 20 μm and a diameter of about 100 μm, and put it into a metal cavity with a thickness of about 30 μm and a diameter of about 150 μm. The material of the metal cavity is T301 stainless steel Or rhenium sheet, which is pressed from a pair of diamond pairs with an anvil surface diameter of 400 μm. In the method of condensing argon with liquid nitrogen, the argon is filled into the cavity filled with mixed powder and ruby ​​particles (compression mark) through the condensing device, and the solid argon is used as the pressure transmission medium and heat insulation material. Through the built-up laser double-sided heating system, the sample in the diamond pressure chamber is subjected to high-pressure and high-temperature treatment in an environment with a pressure of 35GPa or more, a temperature of 1200°C, and a...

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Abstract

The invention discloses a cubic structure potassium antimonate crystal and a preparation method thereof. Wherein the cubic structure potassium antimonate crystal has the following structural parameters: the space group is: Pm-3m, No.221, Z=1, the lattice constant when the pressure is 37.5GPa The present invention obtains SbO by high temperature and high pressure experiments 6 Potassium antimonate crystals with classic perovskite structure connected by octahedron sharing corners.

Description

technical field [0001] The invention relates to the technical field of potassium antimonate crystals. Background technique [0002] Potassium antimonate crystals (KSbO 3 ) through SbO under atmospheric and low pressure conditions 6 The edge-sharing connections of octahedra form a stable trigonal structure (R-3) and a metastable cubic structure (Im-3 and Pn3). Potassium antimonate (KSbO 3 ) of these three structural polytypes are ABO x Structural prototypes for many compounds, including ABO 3 LiSbO 3 , NaSbO 3 , RbSbO 3 , TlSbO 3 , AgSbO 3 、KBiO 3 , AgBiO 3 , BaOsO 3 and KIrO 3 ;ABO 3.5 Type Bi 3 Ge 3 o 10.5 and ABOs 3.667 Type Bi 3 GaSb 2 o 11 、 Bi 3 AlSb 2 o 11 、 Bi 2 NaSb 3 o 11 、 Bi 3 Ru 3 o 11 , La 3 Ru 3 o 11 and Bi 3 mn 3 o 11 Wait. These three structures of potassium antimonate have a common structural feature that is SbO 6 The octahedrons share edges. Functional materials designed and synthesized based on the existing three stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B1/12C30B1/02C30B1/10
CPCC30B1/02C30B1/10C30B1/12C30B29/22
Inventor 谭大勇肖万生周微罗兴丽
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI