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Heat-resistant ceramics for fuel engine nozzles and preparation method thereof

A fuel engine and nozzle technology, applied in the field of ceramic materials, can solve the problems of inability to meet the use requirements of fuel engine nozzles, short heat resistance time, low heat resistance temperature, etc., achieve excellent heat resistance, increase strength and heat resistance, The effect of excellent high temperature strength

Inactive Publication Date: 2016-02-17
郭晓春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the ceramic materials used for fuel engine nozzles have high requirements on heat resistance. However, the heat-resistant ceramics currently on the market generally have low heat-resistant temperature and short heat-resistant time, which cannot meet the requirements of oil engine nozzles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A heat-resistant ceramic for fuel engine nozzles, made of the following raw materials by weight (kg): boehmite 20, spinel 20, Suzhou soil 26, aluminum oxide 6, lanthanum oxide 1, silicon boride 3, Barium Molybdate 2.5, Niobium Pentoxide 1.5, Magnesium Oxide 4, Hydroxypropyl Methyl Cellulose 1, Sodium Tripolyphosphate 2, Diethylene Glycol 4, Sodium Gluconate 2, Cocoyl Glucoside 3, Dodecyl Alkyl sodium sulfate 1.5, carbon nanofiber 3, appropriate amount of deionized water, and appropriate amount of ethanol.

[0016] A method for preparing heat-resistant ceramics for fuel engine nozzles, comprising the following steps:

[0017] (1) Mix boehmite, spinel, aluminum oxide, magnesia, and silicon boride evenly, pulverize them, pass through a 150-mesh sieve, mix evenly with diethylene glycol and sodium gluconate, mill at 2000 rpm for 1 hour, and dry Dry and pulverize to obtain Granule A;

[0018] (2) Mix Suzhou soil, lanthanum oxide, niobium pentoxide, and barium molybdate even...

Embodiment 2

[0024] A heat-resistant ceramic for fuel engine nozzles, made of the following raw materials by weight (kg): boehmite 25, spinel 25, Suzhou soil 28, aluminum oxide 7, lanthanum oxide 1.5, silicon boride 4, Barium Molybdate 3.5, Niobium Pentoxide 2, Magnesium Oxide 5, Hydroxypropyl Methyl Cellulose 1.5, Sodium Tripolyphosphate 2.5, Diethylene Glycol 5, Sodium Gluconate 3, Cocoyl Glucoside 4, Dodecyl Alkyl sodium sulfate 2, carbon nanofiber 4, appropriate amount of deionized water, and appropriate amount of ethanol.

[0025] A method for preparing heat-resistant ceramics for fuel engine nozzles, comprising the following steps:

[0026] (1) Mix boehmite, spinel, aluminum oxide, magnesium oxide, and silicon boride evenly, crush them, pass through a 200-mesh sieve, mix them evenly with diethylene glycol and sodium gluconate, and mill at a high speed of 2500rpm for 1-2 hours , dried and pulverized to obtain Granule A;

[0027] (2) Mix Suzhou soil, lanthanum oxide, niobium pentoxid...

Embodiment 3

[0033] A heat-resistant ceramic for fuel engine nozzles, made of the following raw materials by weight (kg): boehmite 30, spinel 30, Suzhou soil 34, aluminum oxide 8, lanthanum oxide 2, silicon boride 5, Barium molybdate 4.5, niobium pentoxide 2.5, magnesium oxide 6, hydroxypropyl methylcellulose 2, sodium tripolyphosphate 3, diethylene glycol 7, sodium gluconate 4, cocoyl glucoside 5, twelve Sodium Alkyl Sulfate 2.5, Carbon Nanofiber 5, Deionized Water Appropriate, Ethanol Appropriate.

[0034] A method for preparing heat-resistant ceramics for fuel engine nozzles, comprising the following steps:

[0035] (1) Mix boehmite, spinel, aluminum oxide, magnesia and silicon boride evenly, pulverize them, pass through a 250-mesh sieve, mix them evenly with diethylene glycol and sodium gluconate, mill at 3000 rpm for 1 hour, and dry Dry and pulverize to obtain Granule A;

[0036] (2) Mix Suzhou soil, lanthanum oxide, niobium pentoxide, and barium molybdate evenly, crush them, pass t...

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Abstract

The invention discloses a heat-resisting ceramic for a nozzle of a fuel engine and a preparation method of the heat-resisting ceramic. The heat-resisting ceramic is prepared from the following raw materials in parts by weight: 20-30 parts of boehmite, 20-30 parts of spinel, 26-34 parts of Suzhou soil, 6-8 parts of aluminum oxide, 1-2 parts of lanthanum oxide, 3-5 parts of silicon boride, 2.5-4.5 parts of barium molybdate, 1.5-2.5 parts of niobium pentoxide, 4-6 parts of magnesium oxide, 1-2 parts of hydroxypropyl methyl cellulose, 2-3 parts of sodium tripolyphosphate, 4-7 parts of diethylene glycol, 2-4 parts of sodium gluconate, 3-5 parts of coco-glucoside, 1.5-2.5 parts of lauryl sodium sulfate, 3-5 parts of nanometer fibers, a proper amount of deionized water and a proper amount of ethanol. Due to addition of lanthanum oxide, silicon boride, barium molybdate, niobium pentoxide and nanometer fibers, the ceramic disclosed by the invention is greatly improved in strength and heat resistance, excellent in high-temperature strength, excellent in heat resistance, small in thermal expansion coefficient, applicable to the nozzle of the fuel engine and long in service life.

Description

technical field [0001] The invention relates to a heat-resistant ceramic for a fuel engine nozzle and a preparation method thereof, belonging to the field of ceramic materials. Background technique [0002] Ceramics have a long history of use in our country, and are now widely used all over the world. Ceramics are widely valued by various countries because of their excellent dielectric properties, wear resistance, heat insulation properties, piezoelectric properties, and light transmission properties. Heat-resistant ceramics are one of the important branches. Among them, ceramic materials used for fuel engine nozzles have high requirements on heat resistance. However, heat-resistant ceramics on the existing market generally have low heat-resistant temperatures and short heat-resistant time, which cannot meet the requirements of fuel engine nozzles. Therefore, it is urgently needed to improve it so that it can be used in a wider range and its practicability becomes stronger....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/13
Inventor 倪娟形
Owner 郭晓春