Ferrite Core-Shell Particles for Catalyst Support

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Solution Overview

Problem

Ferrite particles with small apparent density and controllable properties that can fill a specified volume with a small weight are not effectively achieved in existing technologies, limiting their use as a catalyst supporting medium.

Innovation Solution

Ferrite particles with an outer shell structure containing titanium oxide, which reduces apparent density while maintaining controllable properties, allowing for suitable dispersion of catalytically active components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of stationary object

If ferrite particles with outer shell structure containing Ti oxide are used, then apparent density is reduced and volume filling efficiency is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvevolume filling efficiencyVSAvoidmanufacturing complexity

Core Design Contradiction:

Volume of stationary objectVSDevice complexity

Solution Approach 1:

The patent applies the nested doll principle by creating a core-shell structure where Ti oxide shell is formed around the ferrite core particles. This nested structure reduces apparent density while maintaining controllable properties, achieving efficient volume filling with reduced weight without excessive manufacturing complexity

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent uses composite materials by combining ferrite core with Ti oxide shell to create a multi-component particle system. This composite structure achieves the desired balance between reduced apparent density, controllable properties, and acceptable manufacturing complexity through the synergistic combination of different materials

Inventive Principle:

Principle #40Composite materials

2Volume of stationary object

If ferrite particles with outer shell structure containing Ti oxide are used, then apparent density is reduced, but manufacturing precision requirements increase

Engineering Contradiction:

Improveapparent densityVSAvoidshell structure control

Core Design Contradiction:

Volume of stationary objectVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by controlling the Ti oxide content (0.1-10 wt%) and shell thickness parameters to achieve the desired apparent density reduction while maintaining manufacturing precision. The specific parameter ranges provided guide the formation of the outer shell structure with controlled properties

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements local quality by creating an outer shell structure with specific Ti oxide concentration and thickness that differs from the core region. This localized modification of particle properties achieves reduced apparent density while maintaining overall manufacturing precision through controlled spatial distribution of materials

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3252016B1Ferrite particles for catalyst carrier which have outer shell structure

Publication Date: 2023.03.01 POWDERTECH CO LTD

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AI summary

An object of the present invention is to provide ferrite particles for supporting a catalyst having a small apparent density, various properties are maintained in a controllable state and a specified volume is filled with a small weight, and a catalyst using the ferrite particles for supporting a catalyst. To achieve the object, ferrite particles for supporting a catalyst provided with an outer shell structure containing Ti oxide, a catalyst using the ferrite particles for supporting a catalyst are employed.