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Method for preparing calcium silicate nanowires in batches at low cost

A calcium silicate and nanowire technology, applied in the direction of silicate, alkaline earth metal silicate, etc., to achieve the effects of abundant raw material sources, low-cost batch preparation, and low cost

Inactive Publication Date: 2010-08-11
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese invention patent "A Preparation Method of Calcium Metasilicate Nanomaterial" (Patent No.: 200310123479.x) relates to the preparation method of calcium metasilicate nanomaterial, and the described method produces calcium silicate nanopowder, and Calcium silicate nanowire is a one-dimensional nanowire material, so there is no patent on low-cost mass production of calcium silicate nanowire

Method used

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  • Method for preparing calcium silicate nanowires in batches at low cost
  • Method for preparing calcium silicate nanowires in batches at low cost
  • Method for preparing calcium silicate nanowires in batches at low cost

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: the mixture of calcium oxide and silicon dioxide accounting for 20% of the water solvent quality is mixed with water and then placed in a closed container and sealed, wherein the filling degree of calcium oxide, silicon dioxide mixture and solvent total amount in the container is 50%, stir evenly, keep warm at a temperature of 150°C and a pressure of 1 MPa for 24 hours, and stir with a magnetic stirrer. After the end of the heat preservation, the aqueous solution containing the white loose substance was collected after natural cooling, and the flocculent and loose white powder was collected after drying in an oven at 100°C. Calcined at 800°C for 1 hour in a muffle furnace, and collected flocculent and loose calcium silicate nanowires after natural cooling.

Embodiment 2

[0030] Embodiment 2: the mixture of calcium oxide and silicon dioxide accounting for 20% of the water solvent quality is mixed with water and then placed in a closed container and sealed, wherein the filling degree of calcium oxide, silicon dioxide mixture and solvent total amount in the container is 30%, uniformly stirred, kept at a temperature of 200°C and a pressure of 2 MPa for 36 hours, and stirred with a magnetic stirrer. After the end of the heat preservation, the aqueous solution containing the white loose substance was collected after natural cooling, and the flocculent and loose white powder was collected after drying in an oven at 100°C. Calcined at 800°C for 1 hour in a muffle furnace, and collected flocculent and loose calcium silicate nanowires after natural cooling.

Embodiment 3

[0031] Embodiment 3: the mixture of calcium oxide and silicon dioxide accounting for 10% of the water solvent quality is mixed with water and then placed in an airtight container and sealed, wherein the filling degree of calcium oxide, silicon dioxide mixture and solvent total amount in the container is 30%, uniformly stirred, kept at a temperature of 250° C. and a pressure of 4 MPa for 12 hours, and stirred with a magnetic stirrer. After the end of the heat preservation, the aqueous solution containing the white loose substance was collected after natural cooling, and the flocculent and loose white powder was collected after drying in an oven at 100°C. Calcined at 800°C for 1 hour in a muffle furnace, and collected flocculent and loose calcium silicate nanowires after natural cooling.

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Abstract

The invention provides a method for preparing calcium silicate nanowires in batches at low cost, belonging to the technical field of nano material preparation. The calcium silicate nanowires are composed of nanowires with diameter of 10-150nm, mean diameter being less than 100nm and length of 50mu m. The preparation method is characterized by mixing the mixture of calcium oxide and silica with water and then placing the mixture into a closed container to be uniformly stirred, preserving heat for 0-48h under the temperature of 150-300 DEG C and pressure of 1-10MPa, collecting aqueous solution with loose white substances after heat preservation and natural cooling, collecting flocculent loose white powder after drying the aqueous solution in an oven under the temperature of 100 DEG C, calcining the white powder in a muffle furnace for 1h under the temperature of 800 DEG C and collecting the flocculent loose white powder after natural cooling, namely the calcium silicate nanowires. In the method, the raw materials have rich sources and the products dispense with subsequent processing, therefore, the obtained calcium silicate nanowires have low cost and can be prepared in batches.

Description

Technical field: [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing calcium silicate nanowires in batches at low cost. Background technique: [0002] Calcium silicate is a white powder with a melting point of 1540°C, hardly soluble in water and alkaline solution, and decomposed in acid. The structural unit of calcium silicate is silicon-oxygen tetrahedron, which has a chain structure and has a low thermal conductivity. It can be widely used in heat preservation and heat insulation technologies for industrial furnaces and high-temperature devices. [0003] One-dimensional nanomaterials have good application prospects in the field of thermal insulation due to their small size and large surface area. Calcium silicate is prepared into a one-dimensional calcium silicate nanowire structure, which can produce nano-effects such as "zero convection" and "infinite long path" when made into thermal insul...

Claims

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Application Information

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IPC IPC(8): C01B33/24
Inventor 裴立宅樊传刚杨连金杨永
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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